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2 years agoMerge branch 'ptp-ocp-new-firmware-support'
David S. Miller [Fri, 11 Mar 2022 11:54:45 +0000 (11:54 +0000)]
Merge branch 'ptp-ocp-new-firmware-support'

Jonathan Lemon says:

====================
ptp: ocp: support for new firmware

This series contains support for new firmware features for
the timecard.

v1 -> v2: roundup() is not 32-bit safe, use DIV_ROUND_UP_ULL
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodocs: ABI: Document new timecard sysfs nodes.
Jonathan Lemon [Thu, 10 Mar 2022 20:19:12 +0000 (12:19 -0800)]
docs: ABI: Document new timecard sysfs nodes.

Add sysfs nodes for the frequency generator and signal counters.

Update SMA selector lists for these, and also add the new
'None', 'VCC' 'GND' selectors.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add 2 more timestampers
Jonathan Lemon [Thu, 10 Mar 2022 20:19:11 +0000 (12:19 -0800)]
ptp: ocp: Add 2 more timestampers

The timecard now has 4 general purpose timestampers.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add 4 frequency counters
Jonathan Lemon [Thu, 10 Mar 2022 20:19:10 +0000 (12:19 -0800)]
ptp: ocp: Add 4 frequency counters

Input signals can be steered to any of the frequency counters.
The counter measures the frequency over a number of seconds:

  echo 0 > freq1/seconds  = turns off measurement
  echo 1 > freq1/seconds  = sets period & turns on measurment.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Program the signal generators via PTP_CLK_REQ_PEROUT
Jonathan Lemon [Thu, 10 Mar 2022 20:19:09 +0000 (12:19 -0800)]
ptp: ocp: Program the signal generators via PTP_CLK_REQ_PEROUT

The signal generators can be programmed either via the sysfs
file or through a PTP_CLK_REQ_PEROUT ioctl request.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add signal generators and update sysfs nodes
Jonathan Lemon [Thu, 10 Mar 2022 20:19:08 +0000 (12:19 -0800)]
ptp: ocp: Add signal generators and update sysfs nodes

Newer firmware provides 4 programmable signal generators, add
support for those here.  The signal generators provide the
ability to set the period, duty cycle, phase offset, and polarity,
with new values defaulting to prior values.

The period and phase offset are specified in nanoseconds.

E.g:    period [duty [phase [polarity]]]

  echo 500000000 > signal # 1/2 second period
  echo 1000000 40 100 > signal # 1ms period, 40% on, offset 100ns
  echo 0 > signal # turn off generator

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add firmware capability bits for feature gating
Jonathan Lemon [Thu, 10 Mar 2022 20:19:07 +0000 (12:19 -0800)]
ptp: ocp: Add firmware capability bits for feature gating

Add the ability to group sysfs nodes behind a firmware feature
check.  This way non-present sysfs attributes are omitted on
older firmware, which does not have newer features.

This will be used in the upcoming patches which adds more
features to the timecard.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add GND and VCC output selectors
Jonathan Lemon [Thu, 10 Mar 2022 20:19:06 +0000 (12:19 -0800)]
ptp: ocp: Add GND and VCC output selectors

These will provide constant outputs.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Rename output selector 'GNSS' to 'GNSS1'
Jonathan Lemon [Thu, 10 Mar 2022 20:19:05 +0000 (12:19 -0800)]
ptp: ocp: Rename output selector 'GNSS' to 'GNSS1'

As there are may be 2 GNSS outputs, rename the first one for clarity.
This also works around a parsing issue when specifying selectors.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add ability to disable input selectors.
Jonathan Lemon [Thu, 10 Mar 2022 20:19:04 +0000 (12:19 -0800)]
ptp: ocp: Add ability to disable input selectors.

This adds support for the "IN: None" selector, which disables
the input on a sma pin.  This should be compatible with old firmware
(the firmware will ignore it if not supported).

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: ocp: Add support for selectable SMA directions.
Jonathan Lemon [Thu, 10 Mar 2022 20:19:03 +0000 (12:19 -0800)]
ptp: ocp: Add support for selectable SMA directions.

Assuming the firmware allows it, the direction of each SMA connector
is no longer fixed.  Handle remapping directions for each pin.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: Improve the CPU TX bitrate.
Horatiu Vultur [Thu, 10 Mar 2022 08:40:05 +0000 (09:40 +0100)]
net: lan966x: Improve the CPU TX bitrate.

When doing manual injection of the frame, it is required to check if the
TX FIFO is ready to accept the next word of the frame. For this we are
using 'readx_poll_timeout_atomic', the only problem is that before it
actually checks the status, is determining the time when to finish polling
the status. Which seems to be an expensive operation.
Therefore check the status of the TX FIFO before calling
'readx_poll_timeout_atomic'.
Doing this will improve the TX bitrate by ~70%. Because 99% the FIFO is
ready by that time. The measurements were done using iperf3.

Before:
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.03  sec  55.2 MBytes  46.2 Mbits/sec    0 sender
[  5]   0.00-10.04  sec  53.8 MBytes  45.0 Mbits/sec      receiver

After:
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.10  sec  95.0 MBytes  78.9 Mbits/sec    0 sender
[  5]   0.00-10.11  sec  95.0 MBytes  78.8 Mbits/sec      receiver

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ethernet: ezchip: fix platform_get_irq.cocci warning
Yihao Han [Thu, 10 Mar 2022 08:12:19 +0000 (00:12 -0800)]
net: ethernet: ezchip: fix platform_get_irq.cocci warning

Remove dev_err() messages after platform_get_irq*() failures.
platform_get_irq() already prints an error.

Generated by: scripts/coccinelle/api/platform_get_irq.cocci

Signed-off-by: Yihao Han <hanyihao@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoflow_dissector: Add support for HSRv0
Kurt Kanzenbach [Thu, 10 Mar 2022 07:35:05 +0000 (08:35 +0100)]
flow_dissector: Add support for HSRv0

Commit bf08824a0f47 ("flow_dissector: Add support for HSR") added support for
HSR within the flow dissector. However, it only works for HSR in version
1. Version 0 uses a different Ether Type. Add support for it.

Reported-by: Anthony Harivel <anthony.harivel@linutronix.de>
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: mv643xx_eth: use platform_get_irq() instead of platform_get_resource()
Minghao Chi [Thu, 10 Mar 2022 06:20:35 +0000 (06:20 +0000)]
net: mv643xx_eth: use platform_get_irq() instead of platform_get_resource()

It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
for requesting IRQ's resources any more, as they can be not ready yet in
case of DT-booting.

platform_get_irq() instead is a recommended way for getting IRQ even if
it was not retrieved earlier.

It also makes code simpler because we're getting "int" value right away
and no conversion from resource to int is required.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ethernet: ti: davinci_emac: Use platform_get_irq() to get the interrupt
Lad Prabhakar [Thu, 10 Mar 2022 01:26:06 +0000 (01:26 +0000)]
net: ethernet: ti: davinci_emac: Use platform_get_irq() to get the interrupt

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq() for DT users only.

While at it propagate error code in emac_dev_stop() in case
platform_get_irq_optional() fails.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ethernet: ti: am65-cpsw: Convert to PHYLINK
Siddharth Vadapalli [Wed, 9 Mar 2022 07:59:44 +0000 (13:29 +0530)]
net: ethernet: ti: am65-cpsw: Convert to PHYLINK

Convert am65-cpsw driver and am65-cpsw ethtool to use Phylink APIs
as described at Documentation/networking/sfp-phylink.rst. All calls
to Phy APIs are replaced with their equivalent Phylink APIs.

No functional change intended. Use Phylink instead of conventional
Phylib, in preparation to add support for SGMII/QSGMII modes.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agopowerpc/net: Implement powerpc specific csum_shift() to remove branch
Christophe Leroy [Tue, 8 Mar 2022 16:12:10 +0000 (17:12 +0100)]
powerpc/net: Implement powerpc specific csum_shift() to remove branch

Today's implementation of csum_shift() leads to branching based on
parity of 'offset'

000002f8 <csum_block_add>:
     2f8: 70 a5 00 01  andi.   r5,r5,1
     2fc: 41 a2 00 08  beq     304 <csum_block_add+0xc>
     300: 54 84 c0 3e  rotlwi  r4,r4,24
     304: 7c 63 20 14  addc    r3,r3,r4
     308: 7c 63 01 94  addze   r3,r3
     30c: 4e 80 00 20  blr

Use first bit of 'offset' directly as input of the rotation instead of
branching.

000002f8 <csum_block_add>:
     2f8: 54 a5 1f 38  rlwinm  r5,r5,3,28,28
     2fc: 20 a5 00 20  subfic  r5,r5,32
     300: 5c 84 28 3e  rotlw   r4,r4,r5
     304: 7c 63 20 14  addc    r3,r3,r4
     308: 7c 63 01 94  addze   r3,r3
     30c: 4e 80 00 20  blr

And change to left shift instead of right shift to skip one more
instruction. This has no impact on the final sum.

000002f8 <csum_block_add>:
     2f8: 54 a5 1f 38  rlwinm  r5,r5,3,28,28
     2fc: 5c 84 28 3e  rotlw   r4,r4,r5
     300: 7c 63 20 14  addc    r3,r3,r4
     304: 7c 63 01 94  addze   r3,r3
     308: 4e 80 00 20  blr

Seems like only powerpc benefits from a branchless implementation.
Other main architectures like ARM or X86 get better code with
the generic implementation and its branch.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge tag 'mlx5-updates-2022-03-10' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Fri, 11 Mar 2022 10:53:32 +0000 (10:53 +0000)]
Merge tag 'mlx5-updates-2022-03-10' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2022-03-10

1) Leon removes useless includes from both mlx5 and mlx4
2) Tariq adds node awareness to some object allocations
3) Gal Cleanups and improvements to EEPROM query
4) Paul adds Software steering to Connection Tracking, to speed up
   CT Rules insertion.

Paul Blakey Says:
=================
To improve insertion rate, this series allows for using software
steering API directly instead of going through the fs_core layer.
This can be done for CT because it doesn't need fs_core layer extra
facilities, such as autogroups, FTE IDs and modifications (which require
a copy of the flow key/mask). Skipping fs_core layer also allows to
create the software steering objects (dr_* objects) ahead of time and
re-use them for multiple rules, whereas software steering under fs_core
creates them on the fly and discards them. This in turn increased insertion
rate.

The series first introduces a lightweight CT flow steering provider
with the first implementations using fs_core layer, and moves CT to use it.
The next patches implement a provider using software steering directly,
bypassing fs_core, and uses it if software steering is available.

=================

====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/mlx5e: Remove overzealous validations in netlink EEPROM query
Gal Pressman [Wed, 26 Jan 2022 14:28:23 +0000 (16:28 +0200)]
net/mlx5e: Remove overzealous validations in netlink EEPROM query

Unlike the legacy EEPROM callbacks, when using the netlink EEPROM query
(get_module_eeprom_by_page) the driver should not try to validate the
query parameters, but just perform the read requested by the userspace.

Recent discussion in the mailing list:
https://lore.kernel.org/netdev/20220120093051.70845141@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net/

Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Parse module mapping using mlx5_ifc
Gal Pressman [Mon, 17 Jan 2022 13:53:06 +0000 (15:53 +0200)]
net/mlx5: Parse module mapping using mlx5_ifc

The assumption that the first byte in the module mapping dword is the
module number shouldn't be hard-coded in the driver, but come from
mlx5_ifc structs.

While at it, fix the incorrect width for the 'rx_lane' and 'tx_lane'
fields.

Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Query the maximum MCIA register read size from firmware
Gal Pressman [Mon, 17 Jan 2022 13:14:44 +0000 (15:14 +0200)]
net/mlx5: Query the maximum MCIA register read size from firmware

The MCIA register supports either 12 or 32 dwords, use the correct value
by querying the capability from the MCAM register.

Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: CT: Create smfs dr matchers dynamically
Paul Blakey [Sun, 5 Sep 2021 07:47:56 +0000 (10:47 +0300)]
net/mlx5: CT: Create smfs dr matchers dynamically

SMFS dr matchers are processed sequentially in hardware according to
their priorities, and not skipped if empty.

Currently, smfs ct fs creates four predefined dr matchers per ct
table (ct/ct nat) with hardcoded priority. Compared to dmfs ct fs
using autogroups, this might cause additional hops in fastpath for
traffic patterns that match later priorties, even if previous
priorites are empty, e.g user only using ipv6 UDP traffic will
have additional 3 hops.

Create the matchers dynamically, using the highest priority available,
on first rule usage, and remove them on last usage.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: CT: Add software steering ct flow steering provider
Paul Blakey [Wed, 29 Sep 2021 10:56:56 +0000 (13:56 +0300)]
net/mlx5: CT: Add software steering ct flow steering provider

fs_core layer adds extra book keeping that is either unneeded for CT, or
unused by the underlying software steering, such as allocating FTEs and
FTE ids, saving the match key and mask, and autogroups management.
On top of that, direct steering has a translation layer (fs_dr) from PRM
commands to direct steering objects, for example, creating temporary
dr_action objects. This has a performance impact when dealing
with CT high insertion rate.

To use direct steering (smfs) directly for ct, add a tc ct fs smfs
implementation. Instead of dmfs autogroups, smfs ct fs uses one of 4
predefined dr matchers in CT and CT-NAT tables, for each combination
of tuple ethertype (ipv4/ipv6), and tuple ip_proto (udp/tcp) that
is currently used by nf flow table flow offload.

At rule insertions, validate the flow rule fits one of the predfined
matcher, and insert to it.

To fill the dr_actions of the rule efficiently, create the fwd to post_ct
tbl dr_action at fs init, the count dr_action at counter creation,
and re-use the already pre-allocated modify header dr_action.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Add smfs lib to export direct steering API to CT
Paul Blakey [Thu, 30 Sep 2021 09:06:35 +0000 (12:06 +0300)]
net/mlx5: Add smfs lib to export direct steering API to CT

Add a thin layer that exports selected direct steering (dr) API
which will be used by a ct fs implementation in a following
patch.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: DR, Add helper to get backing dr table from a mlx5 flow table
Paul Blakey [Tue, 13 Jul 2021 08:19:24 +0000 (11:19 +0300)]
net/mlx5: DR, Add helper to get backing dr table from a mlx5 flow table

If sw steering was used to create the table, dr steeering fs creates
a backing dr table for the mlx5 flow table.

Add helper to return this table so it can be used to create matchers and
add rules on it directly instead of passing via eswitch_offloads/fs_core
insertion.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: CT: Introduce a platform for multiple flow steering providers
Paul Blakey [Tue, 23 Nov 2021 12:41:18 +0000 (14:41 +0200)]
net/mlx5: CT: Introduce a platform for multiple flow steering providers

Currently, fs_core layer provides flow steering services to the driver
including: autogroups, allocating FTEs (flow table entries) and FTE ids,
and support of fte action modification. If then software steering is
configured, rule insertion will go through a translation layer from
firmware buffers to software steering objects (see fs_dr.c).

The connection tracking table is a system table that is not directly
controlled by the user and is a very high scale table. These fs_core
services introduces an overhead that may be optimized by using software
steering API directly.

Introduce ct flow steering interface to allow multiple flow steering
providers. Use the new interface to implement the current dmfs (device
managed flow steering) provider which uses fs_core insertion.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Node-aware allocation for the doorbell pgdir
Tariq Toukan [Wed, 30 Dec 2020 09:45:34 +0000 (11:45 +0200)]
net/mlx5: Node-aware allocation for the doorbell pgdir

The function is node-aware and gets the node as an argument.
Use a node-aware allocation for the doorbell pgdir structure.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Node-aware allocation for UAR
Tariq Toukan [Wed, 30 Dec 2020 09:42:46 +0000 (11:42 +0200)]
net/mlx5: Node-aware allocation for UAR

Prefer the aware allocation, use the device NUMA node.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Node-aware allocation for the EQs
Tariq Toukan [Wed, 30 Dec 2020 09:55:30 +0000 (11:55 +0200)]
net/mlx5: Node-aware allocation for the EQs

Prefer the aware allocation, use the device NUMA node.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Node-aware allocation for the EQ table
Tariq Toukan [Wed, 30 Dec 2020 09:53:14 +0000 (11:53 +0200)]
net/mlx5: Node-aware allocation for the EQ table

Prefer the aware allocation, use the device NUMA node.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Node-aware allocation for the IRQ table
Tariq Toukan [Wed, 30 Dec 2020 09:59:55 +0000 (11:59 +0200)]
net/mlx5: Node-aware allocation for the IRQ table

Prefer the aware allocation, use the device NUMA node.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx5: Delete useless module.h include
Leon Romanovsky [Tue, 11 Jan 2022 08:37:52 +0000 (10:37 +0200)]
net/mlx5: Delete useless module.h include

There is no need in include of module.h in the following files.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agonet/mlx4: Delete useless moduleparam include
Leon Romanovsky [Mon, 10 Jan 2022 12:34:19 +0000 (14:34 +0200)]
net/mlx4: Delete useless moduleparam include

Remove inclusion of not used moduleparam.h.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2 years agoMerge branch 'net-ipa-use-bulk-interconnect-interfaces'
Jakub Kicinski [Fri, 11 Mar 2022 05:20:07 +0000 (21:20 -0800)]
Merge branch 'net-ipa-use-bulk-interconnect-interfaces'

Alex Elder says:

====================
net: ipa: use bulk interconnect interfaces

The IPA code currently enables and disables interconnects by setting
the bandwidth of each to a non-zero value, or to zero.  The
interconnect API now supports enable/disable functions, so we can
use those instead.  In addition, the interconnect API provides bulk
interfaces that allow all interconnects to be operated on at once.

This series converts the IPA driver to use the bulk enable and
disable interfaces.  In the process it uses some existing data
structures rather than defining new ones.
====================

Link: https://lore.kernel.org/r/20220309192037.667879-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: use IPA power device pointer
Alex Elder [Wed, 9 Mar 2022 19:20:37 +0000 (13:20 -0600)]
net: ipa: use IPA power device pointer

The ipa_power structure contains a copy of the IPA device pointer,
so there's no need to pass it to ipa_interconnect_init().  We can
also use that pointer for an error message in ipa_power_enable().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: embed interconnect array in the power structure
Alex Elder [Wed, 9 Mar 2022 19:20:36 +0000 (13:20 -0600)]
net: ipa: embed interconnect array in the power structure

Rather than allocating the interconnect array dynamically, represent
the interconnects with a variable-length array at the end of the
ipa_power structure.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: use bulk interconnect initialization
Alex Elder [Wed, 9 Mar 2022 19:20:35 +0000 (13:20 -0600)]
net: ipa: use bulk interconnect initialization

The previous patch used bulk interconnect operations to initialize
IPA interconnects one at a time.  This rearranges things to use the
bulk interfaces as intended--on all interconnects together.  As a
result ipa_interconnect_init_one() and ipa_interconnect_exit_one()
are no longer needed.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: use bulk operations to set up interconnects
Alex Elder [Wed, 9 Mar 2022 19:20:34 +0000 (13:20 -0600)]
net: ipa: use bulk operations to set up interconnects

Use of_icc_bulk_get() and icc_bulk_put(), icc_bulk_set_bw(), and
icc_bulk_enable() and icc_bulk_disable() to initialize individual
IPA interconnects.  Those functions already log messages in the
event of error so we don't need to.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: use interconnect bulk enable/disable operations
Alex Elder [Wed, 9 Mar 2022 19:20:33 +0000 (13:20 -0600)]
net: ipa: use interconnect bulk enable/disable operations

The power interconnect array is now an array of icc_bulk_data
structures, which is what the interconnect bulk enable and disable
functions require.

Get rid of ipa_interconnect_enable() and ipa_interconnect_disable(),
and just call icc_bulk_enable() and icc_bulk_disable() instead.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: use icc_enable() and icc_disable()
Alex Elder [Wed, 9 Mar 2022 19:20:32 +0000 (13:20 -0600)]
net: ipa: use icc_enable() and icc_disable()

The interconnect framework now provides the ability to enable and
disable interconnects without having to change their recorded
"enabled" bandwidth value.  Use this mechanism, rather than setting
the bandwidth values to zero and non-zero respectively to disable
and enable the IPA interconnects.

Disable each interconnect before setting its "enabled" average and
peak bandwidth values.  Thereafter, enable and disable interconnects
when required rather than setting their bandwidths.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: kill struct ipa_interconnect
Alex Elder [Wed, 9 Mar 2022 19:20:31 +0000 (13:20 -0600)]
net: ipa: kill struct ipa_interconnect

The ipa_interconnect structure contains an icc_path pointer, plus an
average and peak bandwidth value.  Other than the interconnect name,
this matches the icc_bulk_data structure exactly.

Use the icc_bulk_data structure in place of the ipa_interconnect
structure, and add an initialization of its name field.  Then get
rid of the now unnecessary ipa_interconnect structure definition.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoptp: ocp: add UPF_NO_THRE_TEST flag for serial ports
Jonathan Lemon [Wed, 9 Mar 2022 22:34:27 +0000 (14:34 -0800)]
ptp: ocp: add UPF_NO_THRE_TEST flag for serial ports

The serial port driver attempts to test for correct THRE behavior
on startup.  However, it does this by disabling interrupts, and
then intentionally trying to trigger an interrupt in order to see
if the IIR bit is set in the UART.

However, in this FPGA design, the UART interrupt is generated
through the MSI vector, so when interrupts are re-enabled after
the test, the DMAR-IR reports an unhandled IRTE entry, since
no irq handler is installed at this point - it is installed
after the test.

This only happens on the /second/ open of the UART, since on the
first open, the x86_vector has installed and activated by the
driver probe, and is correctly handled.  When the serial port is
closed for the first time, this vector is deactivated and removed,
leading to this error.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/r/20220309223427.34745-1-jonathan.lemon@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonfp: xsk: fix a warning when allocating rx rings
Yinjun Zhang [Wed, 9 Mar 2022 13:55:33 +0000 (14:55 +0100)]
nfp: xsk: fix a warning when allocating rx rings

Previous commits introduced AF_XDP zero-copy support, in which
we need register different mem model for xdp_rxq when AF_XDP
zero-copy is enabled or not. And this should be done after xdp_rxq
info is registered, which is not needed for ctrl port, otherwise
there complaints warnings: "Missing register, driver bug".

Fix this by not registering mem model for ctrl port, just like we
don't register xdp_rxq info for ctrl port.

Fixes: 6402528b7a0b ("nfp: xsk: add AF_XDP zero-copy Rx and Tx support")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20220309135533.10162-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next...
Jakub Kicinski [Fri, 11 Mar 2022 04:20:12 +0000 (20:20 -0800)]
Merge branch '100GbE' of git://git./linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
100GbE Intel Wired LAN Driver Updates 2022-03-09

This series contains updates to ice driver only.

Martyna implements switchdev filtering on inner EtherType field for
tunnels.

Marcin adds reporting of slowpath statistics for port representors.

Jonathan Toppins changes a non-fatal link error message from warning to
debug.

Maciej removes unnecessary checks in ice_clean_tx_irq().

Amritha adds support for ADQ to match outer destination MAC for tunnels.

* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  ice: Add support for outer dest MAC for ADQ tunnels
  ice: avoid XDP checks in ice_clean_tx_irq()
  ice: change "can't set link" message to dbg level
  ice: Add slow path offload stats on port representor in switchdev
  ice: Add support for inner etype in switchdev
====================

Link: https://lore.kernel.org/r/20220309190315.1380414-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'net-control-the-length-of-the-altname-list'
Jakub Kicinski [Fri, 11 Mar 2022 04:15:29 +0000 (20:15 -0800)]
Merge branch 'net-control-the-length-of-the-altname-list'

Jakub Kicinski says:

====================
net: control the length of the altname list

Count the memory used for altnames and don't let user
overflow the property nlattr. This was reported by George:
https://lore.kernel.org/all/3e564baf-a1dd-122e-2882-ff143f7eb578@gmail.com/
====================

Link: https://lore.kernel.org/r/20220309182914.423834-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: limit altnames to 64k total
Jakub Kicinski [Wed, 9 Mar 2022 18:29:14 +0000 (10:29 -0800)]
net: limit altnames to 64k total

Property list (altname is a link "property") is wrapped
in a nlattr. nlattrs length is 16bit so practically
speaking the list of properties can't be longer than
that, otherwise user space would have to interpret
broken netlink messages.

Prevent the problem from occurring by checking the length
of the property list before adding new entries.

Reported-by: George Shuklin <george.shuklin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: account alternate interface name memory
Jakub Kicinski [Wed, 9 Mar 2022 18:29:13 +0000 (10:29 -0800)]
net: account alternate interface name memory

George reports that altnames can eat up kernel memory.
We should charge that memory appropriately.

Reported-by: George Shuklin <george.shuklin@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: openvswitch: fix uAPI incompatibility with existing user space
Ilya Maximets [Wed, 9 Mar 2022 22:20:33 +0000 (23:20 +0100)]
net: openvswitch: fix uAPI incompatibility with existing user space

Few years ago OVS user space made a strange choice in the commit [1]
to define types only valid for the user space inside the copy of a
kernel uAPI header.  '#ifndef __KERNEL__' and another attribute was
added later.

This leads to the inevitable clash between user space and kernel types
when the kernel uAPI is extended.  The issue was unveiled with the
addition of a new type for IPv6 extension header in kernel uAPI.

When kernel provides the OVS_KEY_ATTR_IPV6_EXTHDRS attribute to the
older user space application, application tries to parse it as
OVS_KEY_ATTR_PACKET_TYPE and discards the whole netlink message as
malformed.  Since OVS_KEY_ATTR_IPV6_EXTHDRS is supplied along with
every IPv6 packet that goes to the user space, IPv6 support is fully
broken.

Fixing that by bringing these user space attributes to the kernel
uAPI to avoid the clash.  Strictly speaking this is not the problem
of the kernel uAPI, but changing it is the only way to avoid breakage
of the older user space applications at this point.

These 2 types are explicitly rejected now since they should not be
passed to the kernel.  Additionally, OVS_KEY_ATTR_TUNNEL_INFO moved
out from the '#ifdef __KERNEL__' as there is no good reason to hide
it from the userspace.  And it's also explicitly rejected now, because
it's for in-kernel use only.

Comments with warnings were added to avoid the problem coming back.

(1 << type) converted to (1ULL << type) to avoid integer overflow on
OVS_KEY_ATTR_IPV6_EXTHDRS, since it equals 32 now.

 [1] beb75a40fdc2 ("userspace: Switching of L3 packets in L2 pipeline")

Fixes: 28a3f0601727 ("net: openvswitch: IPv6: Add IPv6 extension header support")
Link: https://lore.kernel.org/netdev/3adf00c7-fe65-3ef4-b6d7-6d8a0cad8a5f@nvidia.com
Link: https://github.com/openvswitch/ovs/commit/beb75a40fdc295bfd6521b0068b4cd12f6de507c
Reported-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Link: https://lore.kernel.org/r/20220309222033.3018976-1-i.maximets@ovn.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: dsa: lantiq_gswip: enable jumbo frames on GSWIP
Aleksander Jan Bajkowski [Tue, 8 Mar 2022 23:04:57 +0000 (00:04 +0100)]
net: dsa: lantiq_gswip: enable jumbo frames on GSWIP

This enables non-standard MTUs on a per-port basis, with the overall
frame size set based on the CPU port.

When the MTU is not changed, this should have no effect.

Long packets crash the switch with MTUs of greater than 2526, so the
maximum is limited for now. Medium packets are sometimes dropped (e.g.
TCP over 2477, UDP over 2516-2519, ICMP over 2526), Hence an MTU value
of 2400 seems safe.

Signed-off-by: Thomas Nixon <tom@tomn.co.uk>
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Link: https://lore.kernel.org/r/20220308230457.1599237-1-olek2@wp.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'linux-can-next-for-5.18-20220310' of git://git.kernel.org/pub/scm/linux...
Jakub Kicinski [Fri, 11 Mar 2022 04:09:26 +0000 (20:09 -0800)]
Merge tag 'linux-can-next-for-5.18-20220310' of git://git./linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2022-03-10

The first 3 patches are by Oliver Hartkopp, target the CAN ISOTP
protocol and update the CAN frame sending behavior, and increases the
max PDU size to 64 kByte.

The next 2 patches are also by Oliver Hartkopp and update the virtual
VXCAN driver so that CAN frames send into the peer name space show up
as RX'ed CAN frames.

Vincent Mailhol contributes a patch for the etas_es58x driver to fix a
false positive dereference uninitialized variable warning.

2 patches by Ulrich Hecht add r8a779a0 SoC support to the rcar_canfd
driver.

The remaining 21 patches target the gs_usb driver and are by Peter
Fink, Ben Evans, Eric Evenchick and me. This series cleans up the
gs-usb driver, documents some bits of the USB ABI used by the widely
used open source firmware candleLight, adds support for up to 3 CAN
interfaces per USB device, adds CAN-FD support, adds quirks for some
hardware and software workarounds and finally adds support for 2 new
devices.

* tag 'linux-can-next-for-5.18-20220310' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (29 commits)
  can: gs_usb: add VID/PID for ABE CAN Debugger devices
  can: gs_usb: add VID/PID for CES CANext FD devices
  can: gs_usb: add extended bt_const feature
  can: gs_usb: activate quirks for CANtact Pro unconditionally
  can: gs_usb: add quirk for CANtact Pro overlapping GS_USB_BREQ value
  can: gs_usb: add usb quirk for NXP LPC546xx controllers
  can: gs_usb: add CAN-FD support
  can: gs_usb: use union and FLEX_ARRAY for data in struct gs_host_frame
  can: gs_usb: support up to 3 channels per device
  can: gs_usb: gs_usb_probe(): introduce udev and make use of it
  can: gs_usb: document the PAD_PKTS_TO_MAX_PKT_SIZE feature
  can: gs_usb: document the USER_ID feature
  can: gs_usb: update GS_CAN_FEATURE_IDENTIFY documentation
  can: gs_usb: add HW timestamp mode bit
  can: gs_usb: gs_make_candev(): call SET_NETDEV_DEV() after handling all bt_const->feature
  can: gs_usb: rewrap usb_control_msg() and usb_fill_bulk_urb()
  can: gs_usb: rewrap error messages
  can: gs_usb: GS_CAN_FLAG_OVERFLOW: make use of BIT()
  can: gs_usb: sort include files alphabetically
  can: gs_usb: fix checkpatch warning
  ...
====================

Link: https://lore.kernel.org/r/20220310142903.341658-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Jakub Kicinski [Fri, 11 Mar 2022 01:16:56 +0000 (17:16 -0800)]
Merge git://git./linux/kernel/git/netdev/net

net/dsa/dsa2.c
  commit afb3cc1a397d ("net: dsa: unlock the rtnl_mutex when dsa_master_setup() fails")
  commit e83d56537859 ("net: dsa: replay master state events in dsa_tree_{setup,teardown}_master")
https://lore.kernel.org/all/20220307101436.7ae87da0@canb.auug.org.au/

drivers/net/ethernet/intel/ice/ice.h
  commit 97b0129146b1 ("ice: Fix error with handling of bonding MTU")
  commit 43113ff73453 ("ice: add TTY for GNSS module for E810T device")
https://lore.kernel.org/all/20220310112843.3233bcf1@canb.auug.org.au/

drivers/staging/gdm724x/gdm_lte.c
  commit fc7f750dc9d1 ("staging: gdm724x: fix use after free in gdm_lte_rx()")
  commit 4bcc4249b4cf ("staging: Use netif_rx().")
https://lore.kernel.org/all/20220308111043.1018a59d@canb.auug.org.au/

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'net-5.17-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Fri, 11 Mar 2022 00:47:58 +0000 (16:47 -0800)]
Merge tag 'net-5.17-rc8' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bluetooth, and ipsec.

  Current release - regressions:

   - Bluetooth: fix unbalanced unlock in set_device_flags()

   - Bluetooth: fix not processing all entries on cmd_sync_work, make
     connect with qualcomm and intel adapters reliable

   - Revert "xfrm: state and policy should fail if XFRMA_IF_ID 0"

   - xdp: xdp_mem_allocator can be NULL in trace_mem_connect()

   - eth: ice: fix race condition and deadlock during interface enslave

  Current release - new code bugs:

   - tipc: fix incorrect order of state message data sanity check

  Previous releases - regressions:

   - esp: fix possible buffer overflow in ESP transformation

   - dsa: unlock the rtnl_mutex when dsa_master_setup() fails

   - phy: meson-gxl: fix interrupt handling in forced mode

   - smsc95xx: ignore -ENODEV errors when device is unplugged

  Previous releases - always broken:

   - xfrm: fix tunnel mode fragmentation behavior

   - esp: fix inter address family tunneling on GSO

   - tipc: fix null-deref due to race when enabling bearer

   - sctp: fix kernel-infoleak for SCTP sockets

   - eth: macb: fix lost RX packet wakeup race in NAPI receive

   - eth: intel stop disabling VFs due to PF error responses

   - eth: bcmgenet: don't claim WOL when its not available"

* tag 'net-5.17-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (50 commits)
  xdp: xdp_mem_allocator can be NULL in trace_mem_connect().
  ice: Fix race condition during interface enslave
  net: phy: meson-gxl: improve link-up behavior
  net: bcmgenet: Don't claim WOL when its not available
  net: arc_emac: Fix use after free in arc_mdio_probe()
  sctp: fix kernel-infoleak for SCTP sockets
  net: phy: correct spelling error of media in documentation
  net: phy: DP83822: clear MISR2 register to disable interrupts
  gianfar: ethtool: Fix refcount leak in gfar_get_ts_info
  selftests: pmtu.sh: Kill nettest processes launched in subshell.
  selftests: pmtu.sh: Kill tcpdump processes launched by subshell.
  NFC: port100: fix use-after-free in port100_send_complete
  net/mlx5e: SHAMPO, reduce TIR indication
  net/mlx5e: Lag, Only handle events from highest priority multipath entry
  net/mlx5: Fix offloading with ESWITCH_IPV4_TTL_MODIFY_ENABLE
  net/mlx5: Fix a race on command flush flow
  net/mlx5: Fix size field in bufferx_reg struct
  ax25: Fix NULL pointer dereference in ax25_kill_by_device
  net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr
  net: ethernet: lpc_eth: Handle error for clk_enable
  ...

2 years agoxdp: xdp_mem_allocator can be NULL in trace_mem_connect().
Sebastian Andrzej Siewior [Wed, 9 Mar 2022 22:13:45 +0000 (23:13 +0100)]
xdp: xdp_mem_allocator can be NULL in trace_mem_connect().

Since the commit mentioned below __xdp_reg_mem_model() can return a NULL
pointer. This pointer is dereferenced in trace_mem_connect() which leads
to segfault.

The trace points (mem_connect + mem_disconnect) were put in place to
pair connect/disconnect using the IDs. The ID is only assigned if
__xdp_reg_mem_model() does not return NULL. That connect trace point is
of no use if there is no ID.

Skip that connect trace point if xdp_alloc is NULL.

[ Toke Høiland-Jørgensen delivered the reasoning for skipping the trace
  point ]

Fixes: 4a48ef70b93b8 ("xdp: Allow registering memory model without rxq reference")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/YikmmXsffE+QajTB@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoice: Fix race condition during interface enslave
Ivan Vecera [Thu, 10 Mar 2022 17:16:41 +0000 (18:16 +0100)]
ice: Fix race condition during interface enslave

Commit 5dbbbd01cbba83 ("ice: Avoid RTNL lock when re-creating
auxiliary device") changes a process of re-creation of aux device
so ice_plug_aux_dev() is called from ice_service_task() context.
This unfortunately opens a race window that can result in dead-lock
when interface has left LAG and immediately enters LAG again.

Reproducer:
```
#!/bin/sh

ip link add lag0 type bond mode 1 miimon 100
ip link set lag0

for n in {1..10}; do
        echo Cycle: $n
        ip link set ens7f0 master lag0
        sleep 1
        ip link set ens7f0 nomaster
done
```

This results in:
[20976.208697] Workqueue: ice ice_service_task [ice]
[20976.213422] Call Trace:
[20976.215871]  __schedule+0x2d1/0x830
[20976.219364]  schedule+0x35/0xa0
[20976.222510]  schedule_preempt_disabled+0xa/0x10
[20976.227043]  __mutex_lock.isra.7+0x310/0x420
[20976.235071]  enum_all_gids_of_dev_cb+0x1c/0x100 [ib_core]
[20976.251215]  ib_enum_roce_netdev+0xa4/0xe0 [ib_core]
[20976.256192]  ib_cache_setup_one+0x33/0xa0 [ib_core]
[20976.261079]  ib_register_device+0x40d/0x580 [ib_core]
[20976.266139]  irdma_ib_register_device+0x129/0x250 [irdma]
[20976.281409]  irdma_probe+0x2c1/0x360 [irdma]
[20976.285691]  auxiliary_bus_probe+0x45/0x70
[20976.289790]  really_probe+0x1f2/0x480
[20976.298509]  driver_probe_device+0x49/0xc0
[20976.302609]  bus_for_each_drv+0x79/0xc0
[20976.306448]  __device_attach+0xdc/0x160
[20976.310286]  bus_probe_device+0x9d/0xb0
[20976.314128]  device_add+0x43c/0x890
[20976.321287]  __auxiliary_device_add+0x43/0x60
[20976.325644]  ice_plug_aux_dev+0xb2/0x100 [ice]
[20976.330109]  ice_service_task+0xd0c/0xed0 [ice]
[20976.342591]  process_one_work+0x1a7/0x360
[20976.350536]  worker_thread+0x30/0x390
[20976.358128]  kthread+0x10a/0x120
[20976.365547]  ret_from_fork+0x1f/0x40
...
[20976.438030] task:ip              state:D stack:    0 pid:213658 ppid:213627 flags:0x00004084
[20976.446469] Call Trace:
[20976.448921]  __schedule+0x2d1/0x830
[20976.452414]  schedule+0x35/0xa0
[20976.455559]  schedule_preempt_disabled+0xa/0x10
[20976.460090]  __mutex_lock.isra.7+0x310/0x420
[20976.464364]  device_del+0x36/0x3c0
[20976.467772]  ice_unplug_aux_dev+0x1a/0x40 [ice]
[20976.472313]  ice_lag_event_handler+0x2a2/0x520 [ice]
[20976.477288]  notifier_call_chain+0x47/0x70
[20976.481386]  __netdev_upper_dev_link+0x18b/0x280
[20976.489845]  bond_enslave+0xe05/0x1790 [bonding]
[20976.494475]  do_setlink+0x336/0xf50
[20976.502517]  __rtnl_newlink+0x529/0x8b0
[20976.543441]  rtnl_newlink+0x43/0x60
[20976.546934]  rtnetlink_rcv_msg+0x2b1/0x360
[20976.559238]  netlink_rcv_skb+0x4c/0x120
[20976.563079]  netlink_unicast+0x196/0x230
[20976.567005]  netlink_sendmsg+0x204/0x3d0
[20976.570930]  sock_sendmsg+0x4c/0x50
[20976.574423]  ____sys_sendmsg+0x1eb/0x250
[20976.586807]  ___sys_sendmsg+0x7c/0xc0
[20976.606353]  __sys_sendmsg+0x57/0xa0
[20976.609930]  do_syscall_64+0x5b/0x1a0
[20976.613598]  entry_SYSCALL_64_after_hwframe+0x65/0xca

1. Command 'ip link ... set nomaster' causes that ice_plug_aux_dev()
   is called from ice_service_task() context, aux device is created
   and associated device->lock is taken.
2. Command 'ip link ... set master...' calls ice's notifier under
   RTNL lock and that notifier calls ice_unplug_aux_dev(). That
   function tries to take aux device->lock but this is already taken
   by ice_plug_aux_dev() in step 1
3. Later ice_plug_aux_dev() tries to take RTNL lock but this is already
   taken in step 2
4. Dead-lock

The patch fixes this issue by following changes:
- Bit ICE_FLAG_PLUG_AUX_DEV is kept to be set during ice_plug_aux_dev()
  call in ice_service_task()
- The bit is checked in ice_clear_rdma_cap() and only if it is not set
  then ice_unplug_aux_dev() is called. If it is set (in other words
  plugging of aux device was requested and ice_plug_aux_dev() is
  potentially running) then the function only clears the bit
- Once ice_plug_aux_dev() call (in ice_service_task) is finished
  the bit ICE_FLAG_PLUG_AUX_DEV is cleared but it is also checked
  whether it was already cleared by ice_clear_rdma_cap(). If so then
  aux device is unplugged.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Co-developed-by: Petr Oros <poros@redhat.com>
Signed-off-by: Petr Oros <poros@redhat.com>
Reviewed-by: Dave Ertman <david.m.ertman@intel.com>
Link: https://lore.kernel.org/r/20220310171641.3863659-1-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: phy: meson-gxl: improve link-up behavior
Heiner Kallweit [Wed, 9 Mar 2022 21:04:47 +0000 (22:04 +0100)]
net: phy: meson-gxl: improve link-up behavior

Sometimes the link comes up but no data flows. This patch fixes
this behavior. It's not clear what's the root cause of the issue.

According to the tests one other link-up issue remains.
In very rare cases the link isn't even reported as up.

Fixes: 84c8f773d2dc ("net: phy: meson-gxl: remove the use of .ack_callback()")
Tested-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/e3473452-a1f9-efcf-5fdd-02b6f44c3fcd@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: bcmgenet: Don't claim WOL when its not available
Jeremy Linton [Thu, 10 Mar 2022 04:55:35 +0000 (22:55 -0600)]
net: bcmgenet: Don't claim WOL when its not available

Some of the bcmgenet platforms don't correctly support WOL, yet
ethtool returns:

"Supports Wake-on: gsf"

which is false.

Ideally if there isn't a wol_irq, or there is something else that
keeps the device from being able to wakeup it should display:

"Supports Wake-on: d"

This patch checks whether the device can wakup, before using the
hard-coded supported flags. This corrects the ethtool reporting, as
well as the WOL configuration because ethtool verifies that the mode
is supported before attempting it.

Fixes: c51de7f3976b ("net: bcmgenet: add Wake-on-LAN support code")
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220310045535.224450-1-jeremy.linton@arm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: arc_emac: Fix use after free in arc_mdio_probe()
Jianglei Nie [Wed, 9 Mar 2022 12:18:24 +0000 (20:18 +0800)]
net: arc_emac: Fix use after free in arc_mdio_probe()

If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free
the "bus". But bus->name is still used in the next line, which will lead
to a use after free.

We can fix it by putting the name in a local variable and make the
bus->name point to the rodata section "name",then use the name in the
error message without referring to bus to avoid the uaf.

Fixes: 95b5fc03c189 ("net: arc_emac: Make use of the helper function dev_err_probe()")
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Link: https://lore.kernel.org/r/20220309121824.36529-1-niejianglei2021@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agosctp: fix kernel-infoleak for SCTP sockets
Eric Dumazet [Thu, 10 Mar 2022 00:11:45 +0000 (16:11 -0800)]
sctp: fix kernel-infoleak for SCTP sockets

syzbot reported a kernel infoleak [1] of 4 bytes.

After analysis, it turned out r->idiag_expires is not initialized
if inet_sctp_diag_fill() calls inet_diag_msg_common_fill()

Make sure to clear idiag_timer/idiag_retrans/idiag_expires
and let inet_diag_msg_sctpasoc_fill() fill them again if needed.

[1]

BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:154 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668
 instrument_copy_to_user include/linux/instrumented.h:121 [inline]
 copyout lib/iov_iter.c:154 [inline]
 _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668
 copy_to_iter include/linux/uio.h:162 [inline]
 simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519
 __skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425
 skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533
 skb_copy_datagram_msg include/linux/skbuff.h:3696 [inline]
 netlink_recvmsg+0x669/0x1c80 net/netlink/af_netlink.c:1977
 sock_recvmsg_nosec net/socket.c:948 [inline]
 sock_recvmsg net/socket.c:966 [inline]
 __sys_recvfrom+0x795/0xa10 net/socket.c:2097
 __do_sys_recvfrom net/socket.c:2115 [inline]
 __se_sys_recvfrom net/socket.c:2111 [inline]
 __x64_sys_recvfrom+0x19d/0x210 net/socket.c:2111
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3247 [inline]
 __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1158 [inline]
 netlink_dump+0x3e5/0x16c0 net/netlink/af_netlink.c:2248
 __netlink_dump_start+0xcf8/0xe90 net/netlink/af_netlink.c:2373
 netlink_dump_start include/linux/netlink.h:254 [inline]
 inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1341
 sock_diag_rcv_msg+0x24a/0x620
 netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2494
 sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:277
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x1093/0x1360 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0x14d9/0x1720 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 sock_write_iter+0x594/0x690 net/socket.c:1061
 do_iter_readv_writev+0xa7f/0xc70
 do_iter_write+0x52c/0x1500 fs/read_write.c:851
 vfs_writev fs/read_write.c:924 [inline]
 do_writev+0x645/0xe00 fs/read_write.c:967
 __do_sys_writev fs/read_write.c:1040 [inline]
 __se_sys_writev fs/read_write.c:1037 [inline]
 __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Bytes 68-71 of 2508 are uninitialized
Memory access of size 2508 starts at ffff888114f9b000
Data copied to user address 00007f7fe09ff2e0

CPU: 1 PID: 3478 Comm: syz-executor306 Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Fixes: 8f840e47f190 ("sctp: add the sctp_diag.c file")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/20220310001145.297371-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: phy: correct spelling error of media in documentation
Colin Foster [Wed, 9 Mar 2022 06:25:44 +0000 (22:25 -0800)]
net: phy: correct spelling error of media in documentation

The header file incorrectly referenced "median-independant interface"
instead of media. Correct this typo.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Fixes: 4069a572d423 ("net: phy: Document core PHY structures")
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20220309062544.3073-1-colin.foster@in-advantage.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'mlx5-updates-2022-03-09' of git://git.kernel.org/pub/scm/linux/kernel...
Jakub Kicinski [Thu, 10 Mar 2022 22:35:21 +0000 (14:35 -0800)]
Merge tag 'mlx5-updates-2022-03-09' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2022-03-09

1) Remove kernel log prints on FW events regarding FW pages management
   and replace that with debugfs entries to track FW pages management commands
   failures and general stats, we do that for all FW commands in general since
   it's the same effort to do so under the already existing debugfs entry for
   FW commands.

2) Add support for ConnectX-7 Software managed steering, in other words STEv2
   which shares a lot in common with STE V1, the difference is in specific
   offsets in the devices, the logic is almost the same, thus we implement
   STEv1 and STEv2 in the same file.

* tag 'mlx5-updates-2022-03-09' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5: DR, Add support for ConnectX-7 steering
  net/mlx5: DR, Refactor ste_ctx handling for STE v0/1
  net/mlx5: DR, Rename action modify fields to reflect naming in HW spec
  net/mlx5: DR, Fix handling of different actions on the same STE in STEv1
  net/mlx5: DR, Remove unneeded comments
  net/mlx5: DR, Add support for matching on Internet Header Length (IHL)
  net/mlx5: DR, Align mlx5dv_dr API vport action with FW behavior
  net/mlx5: Add debugfs counters for page commands failures
  net/mlx5: Add pages debugfs
  net/mlx5: Move debugfs entries to separate struct
  net/mlx5: Change release_all_pages cap bit location
  net/mlx5: Remove redundant error on reclaim pages
  net/mlx5: Remove redundant error on give pages
  net/mlx5: Remove redundant notify fail on give pages
  net/mlx5: Add command failures data to debugfs
  net/mlx5e: TC, Fix use after free in mlx5e_clone_flow_attr_for_post_act()
====================

Link: https://lore.kernel.org/r/20220309213755.610202-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'mlx5-fixes-2022-03-09' of git://git.kernel.org/pub/scm/linux/kernel/git...
Jakub Kicinski [Thu, 10 Mar 2022 22:32:32 +0000 (14:32 -0800)]
Merge tag 'mlx5-fixes-2022-03-09' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2022-03-09

This series provides bug fixes to mlx5 driver.

* tag 'mlx5-fixes-2022-03-09' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5e: SHAMPO, reduce TIR indication
  net/mlx5e: Lag, Only handle events from highest priority multipath entry
  net/mlx5: Fix offloading with ESWITCH_IPV4_TTL_MODIFY_ENABLE
  net/mlx5: Fix a race on command flush flow
  net/mlx5: Fix size field in bufferx_reg struct
====================

Link: https://lore.kernel.org/r/20220309201517.589132-1-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'block-5.17-2022-03-10' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 10 Mar 2022 20:56:36 +0000 (12:56 -0800)]
Merge tag 'block-5.17-2022-03-10' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Just a single fix for a regression that occured in this merge window"

* tag 'block-5.17-2022-03-10' of git://git.kernel.dk/linux-block:
  block: fix blk_mq_attempt_bio_merge and rq_qos_throttle protection

2 years agoMerge tag 'staging-5.17-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Thu, 10 Mar 2022 20:43:06 +0000 (12:43 -0800)]
Merge tag 'staging-5.17-rc8' of git://git./linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg KH:
 "Here are three small fixes for staging drivers for 5.17-rc8 or -final,
  which ever comes next.

  They resolve some reported problems:

   - rtl8723bs wifi driver deadlock fix for reported problem that is a
     revert of a previous patch. Also a documentation fix is added so
     that the same problem hopefully can not come back again.

   - gdm724x driver use-after-free fix for a reported problem.

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'staging-5.17-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: rtl8723bs: Improve the comment explaining the locking rules
  staging: rtl8723bs: Fix access-point mode deadlock
  staging: gdm724x: fix use after free in gdm_lte_rx()

2 years agoMerge branch 'mptcp-selftests-refactor-join-tests'
Jakub Kicinski [Thu, 10 Mar 2022 20:30:04 +0000 (12:30 -0800)]
Merge branch 'mptcp-selftests-refactor-join-tests'

Mat Martineau says:

====================
mptcp: selftests: Refactor join tests

The mptcp_join.sh selftest is the largest and most complex self test for
MPTCP, and it is frequently used by MPTCP developers to reproduce bugs
and verify fixes. As it grew in size and execution time, it became more
cumbersome to use.

These changes do some much-needed cleanup, and add developer-friendly
features to make it easier to see failures and run a subset of the tests
when verifying fixes.
====================

Link: https://lore.kernel.org/r/20220309191636.258232-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: make it shellcheck compliant
Matthieu Baerts [Wed, 9 Mar 2022 19:16:36 +0000 (11:16 -0800)]
selftests: mptcp: join: make it shellcheck compliant

This fixes a few issues reported by ShellCheck:

- SC2068: Double quote array expansions to avoid re-splitting elements.
- SC2206: Quote to prevent word splitting/globbing, or split robustly
          with mapfile or read -a.
- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
- SC2155: Declare and assign separately to avoid masking return values.
- SC2162: read without -r will mangle backslashes.
- SC2219: Instead of 'let expr', prefer (( expr )) .
- SC2181: Check exit code directly with e.g. 'if mycmd;', not indirectly
          with $?.
- SC2236: Use -n instead of ! -z.
- SC2004: $/${} is unnecessary on arithmetic variables.
- SC2012: Use find instead of ls to better handle non-alphanumeric
          filenames.
- SC2002: Useless cat. Consider 'cmd < file | ..' or 'cmd file | ..'
          instead.

SC2086 (Double quotes to prevent globbing and word splitting) is ignored
because it is controlled for the moment and there are too many to
change.

While at it, also fixed the alignment in one comment.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: avoid backquotes
Matthieu Baerts [Wed, 9 Mar 2022 19:16:35 +0000 (11:16 -0800)]
selftests: mptcp: join: avoid backquotes

As explained on ShellCheck's wiki [1], it is recommended to avoid
backquotes `...` in favour of parenthesis $(...):

> Backtick command substitution `...` is legacy syntax with several
> issues.
>
> - It has a series of undefined behaviors related to quoting in POSIX.
> - It imposes a custom escaping mode with surprising results.
> - It's exceptionally hard to nest.
>
> $(...) command substitution has none of these problems, and is
> therefore strongly encouraged.

[1] https://www.shellcheck.net/wiki/SC2006

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: clarify local/global vars
Matthieu Baerts [Wed, 9 Mar 2022 19:16:34 +0000 (11:16 -0800)]
selftests: mptcp: join: clarify local/global vars

Some vars are redefined in different places. Best to avoid this
classical Bash pitfall where variables are accidentally overridden by
other functions because the proper scope has not been defined.

Most issues are with loops: typically 'i' is used in for-loops but if it
is not global, calling a function from a for-loop also doing a for-loop
with the same non local 'i' variable causes troubles because the first
'i' will be assigned to another value. To prevent such issues, the
iterator variable is now declared as local just before the loop. If it
is always done like this, issues are avoided.

To distinct between local and non local variables, all non local ones
are defined at the beginning of the script. The others are now defined
with the "local" keyword.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: helper to filter TCP
Matthieu Baerts [Wed, 9 Mar 2022 19:16:33 +0000 (11:16 -0800)]
selftests: mptcp: join: helper to filter TCP

This is more readable and reduces duplicated commands.

This might also be useful to add v6 support and switch to nftables.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: list failure at the end
Matthieu Baerts [Wed, 9 Mar 2022 19:16:32 +0000 (11:16 -0800)]
selftests: mptcp: join: list failure at the end

With ~100 tests, it helps to have this summary at the end not to scroll
to find which one has failed.

It is especially interseting when looking at the output produced by the
CI where the kernel logs from the serial are mixed together.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: alt. to exec specific tests
Matthieu Baerts [Wed, 9 Mar 2022 19:16:31 +0000 (11:16 -0800)]
selftests: mptcp: join: alt. to exec specific tests

Running a specific test by giving the ID is often what we want: the CI
reports an issue with the Nth test, it is reproducible with:

  ./mptcp_join.sh N

But this might not work when there is a need to find which commit has
introduced a regression making a test unstable: failing from time to
time. Indeed, a specific test is not attached to one ID: the ID is in
fact a counter. It means the same test can have a different ID if other
tests have been added/removed before this unstable one.

Remembering the current test can also help listing failed tests at the
end.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: option to execute specific tests
Matthieu Baerts [Wed, 9 Mar 2022 19:16:30 +0000 (11:16 -0800)]
selftests: mptcp: join: option to execute specific tests

Often, it is needed to run one specific test.

There are options to run subgroups of tests but when only one fails, no
need to run all the subgroup. So far, the solution was to edit the
script to comment the tests that are not needed but that's not ideal.

Now, it is possible to run one specific test by giving the ID of the
tests that are going to be validated, e.g.

  ./mptcp_join.sh 36 37

This is cleaner and saves time.

Technically, the reset* functions now return 0 if the test can be
executed. This naturally creates sections per test in the code which is
also helpful to understand what a test is exactly doing.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: reset failing links
Matthieu Baerts [Wed, 9 Mar 2022 19:16:29 +0000 (11:16 -0800)]
selftests: mptcp: join: reset failing links

Best to always reset this env var before each test to avoid surprising
behaviour depending on the order tests are running.

Also clearly set it for the last failing links test is also needed when
only this test is executed.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: join: define tests groups once
Matthieu Baerts [Wed, 9 Mar 2022 19:16:28 +0000 (11:16 -0800)]
selftests: mptcp: join: define tests groups once

When adding a new tests group, it has to be defined in multiple places:

- in the all_tests() function
- in the 'usage()' function
- in the getopts: short option + what to do when the option is used

Because it is easy to forget one of them, it is useful to have to define
them only once.

Note: only using an associative array would simplify the code but the
entries are stored in a hashtable and iterating over the different items
doesn't give the same order as the one used in the declaration of this
array. Because we want to run these tests in the same order as before, a
"simple" array is used first.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: drop msg argument of chk_csum_nr
Geliang Tang [Wed, 9 Mar 2022 19:16:27 +0000 (11:16 -0800)]
selftests: mptcp: drop msg argument of chk_csum_nr

This patch dropped the msg argument of chk_csum_nr, to unify chk_csum_nr
with other chk_*_nr functions.

Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: phy: DP83822: clear MISR2 register to disable interrupts
Clément Léger [Wed, 9 Mar 2022 14:22:28 +0000 (15:22 +0100)]
net: phy: DP83822: clear MISR2 register to disable interrupts

MISR1 was cleared twice but the original author intention was probably
to clear MISR1 & MISR2 to completely disable interrupts. Fix it to
clear MISR2.

Fixes: 87461f7a58ab ("net: phy: DP83822 initial driver submission")
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220309142228.761153-1-clement.leger@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agogianfar: ethtool: Fix refcount leak in gfar_get_ts_info
Miaoqian Lin [Thu, 10 Mar 2022 01:53:13 +0000 (01:53 +0000)]
gianfar: ethtool: Fix refcount leak in gfar_get_ts_info

The of_find_compatible_node() function returns a node pointer with
refcount incremented, We should use of_node_put() on it when done
Add the missing of_node_put() to release the refcount.

Fixes: 7349a74ea75c ("net: ethernet: gianfar_ethtool: get phc index through drvdata")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Link: https://lore.kernel.org/r/20220310015313.14938-1-linmq006@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'soc-fixes-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Thu, 10 Mar 2022 19:43:01 +0000 (11:43 -0800)]
Merge tag 'soc-fixes-5.17-3' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Here is a third set of fixes for the soc tree, well within the
  expected set of changes.

  Maintainer list changes:
   - Krzysztof Kozlowski and Jisheng Zhang both have new email addresses
   - Broadcom iProc has a new git tree

  Regressions:
   - Robert Foss sends a revert for a Mediatek DPI bridge patch that
     caused an inadvertent break in the DT binding
   - mstar timers need to be included in Kconfig

  Devicetree fixes for:
   - Aspeed ast2600 spi pinmux
   - Tegra eDP panels on Nyan FHD
   - Tegra display IOMMU
   - Qualcomm sm8350 UFS clocks
   - minor DT changes for Marvell Armada, Qualcomm sdx65, Qualcomm
     sm8450, and Broadcom BCM2711"

* tag 'soc-fixes-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  arm64: dts: marvell: armada-37xx: Remap IO space to bus address 0x0
  MAINTAINERS: Update Jisheng's email address
  Revert "arm64: dts: mt8183: jacuzzi: Fix bus properties in anx's DSI endpoint"
  dt-bindings: drm/bridge: anx7625: Revert DPI support
  ARM: dts: aspeed: Fix AST2600 quad spi group
  MAINTAINERS: update Krzysztof Kozlowski's email
  MAINTAINERS: Update git tree for Broadcom iProc SoCs
  ARM: tegra: Move Nyan FHD panels to AUX bus
  arm64: dts: armada-3720-turris-mox: Add missing ethernet0 alias
  ARM: mstar: Select HAVE_ARM_ARCH_TIMER
  soc: mediatek: mt8192-mmsys: Fix dither to dsi0 path's input sel
  arm64: dts: mt8183: jacuzzi: Fix bus properties in anx's DSI endpoint
  ARM: boot: dts: bcm2711: Fix HVS register range
  arm64: dts: qcom: c630: disable crypto due to serror
  arm64: dts: qcom: sm8450: fix apps_smmu interrupts
  arm64: dts: qcom: sm8450: enable GCC_USB3_0_CLKREF_EN for usb
  arm64: dts: qcom: sm8350: Correct UFS symbol clocks
  arm64: tegra: Disable ISO SMMU for Tegra194
  Revert "dt-bindings: arm: qcom: Document SDX65 platform and boards"

2 years agomm: gup: make fault_in_safe_writeable() use fixup_user_fault()
Linus Torvalds [Tue, 8 Mar 2022 19:55:48 +0000 (11:55 -0800)]
mm: gup: make fault_in_safe_writeable() use fixup_user_fault()

Instead of using GUP, make fault_in_safe_writeable() actually force a
'handle_mm_fault()' using the same fixup_user_fault() machinery that
futexes already use.

Using the GUP machinery meant that fault_in_safe_writeable() did not do
everything that a real fault would do, ranging from not auto-expanding
the stack segment, to not updating accessed or dirty flags in the page
tables (GUP sets those flags on the pages themselves).

The latter causes problems on architectures (like s390) that do accessed
bit handling in software, which meant that fault_in_safe_writeable()
didn't actually do all the fault handling it needed to, and trying to
access the user address afterwards would still cause faults.

Reported-and-tested-by: Andreas Gruenbacher <agruenba@redhat.com>
Fixes: cdd591fc86e3 ("iov_iter: Introduce fault_in_iov_iter_writeable")
Link: https://lore.kernel.org/all/CAHc6FU5nP+nziNGG0JAF1FUx-GV7kKFvM7aZuU_XD2_1v4vnvg@mail.gmail.com/
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge tag 'mvebu-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gclem...
Arnd Bergmann [Thu, 10 Mar 2022 14:25:45 +0000 (15:25 +0100)]
Merge tag 'mvebu-fixes-5.17-2' of git://git./linux/kernel/git/gclement/mvebu into arm/fixes

mvebu fixes for 5.17 (part 2)

Allow using old PCIe card on Armada 37xx

* tag 'mvebu-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu:
  arm64: dts: marvell: armada-37xx: Remap IO space to bus address 0x0

Link: https://lore.kernel.org/r/87bkydj4fn.fsf@BL-laptop
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2 years agoarm64: dts: marvell: armada-37xx: Remap IO space to bus address 0x0
Pali Rohár [Thu, 10 Mar 2022 10:39:23 +0000 (11:39 +0100)]
arm64: dts: marvell: armada-37xx: Remap IO space to bus address 0x0

Legacy and old PCI I/O based cards do not support 32-bit I/O addressing.

Since commit 64f160e19e92 ("PCI: aardvark: Configure PCIe resources from
'ranges' DT property") kernel can set different PCIe address on CPU and
different on the bus for the one A37xx address mapping without any firmware
support in case the bus address does not conflict with other A37xx mapping.

So remap I/O space to the bus address 0x0 to enable support for old legacy
I/O port based cards which have hardcoded I/O ports in low address space.

Note that DDR on A37xx is mapped to bus address 0x0. And mapping of I/O
space can be set to address 0x0 too because MEM space and I/O space are
separate and so do not conflict.

Remapping IO space on Turris Mox to different address is not possible to
due bootloader bug.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 76f6386b25cc ("arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700")
Cc: stable@vger.kernel.org # 64f160e19e92 ("PCI: aardvark: Configure PCIe resources from 'ranges' DT property")
Cc: stable@vger.kernel.org # 514ef1e62d65 ("arm64: dts: marvell: armada-37xx: Extend PCIe MEM space")
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
2 years agoMerge tag 'spi-fix-v5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...
Linus Torvalds [Thu, 10 Mar 2022 12:15:09 +0000 (04:15 -0800)]
Merge tag 'spi-fix-v5.17-rc7' of git://git./linux/kernel/git/broonie/spi

Pull spi fix from Mark Brown:
 "One fix for type conversion issues when working out maximum
  scatter/gather segment sizes.

  It caused problems for some systems where the limits overflow
  due to the type conversion"

* tag 'spi-fix-v5.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: Fix invalid sgs value

2 years agoARM: fix build warning in proc-v7-bugs.c
Russell King (Oracle) [Thu, 10 Mar 2022 10:22:14 +0000 (10:22 +0000)]
ARM: fix build warning in proc-v7-bugs.c

The kernel test robot discovered that building without
HARDEN_BRANCH_PREDICTOR issues a warning due to a missing
argument to pr_info().

Add the missing argument.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 9dd78194a372 ("ARM: report Spectre v2 status through sysfs")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge tag 'gpio-fixes-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 10 Mar 2022 11:55:33 +0000 (03:55 -0800)]
Merge tag 'gpio-fixes-for-v5.17' of git://git./linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix a probe failure for Tegra241 GPIO controller in gpio-tegra186

 - revert changes that caused a regression in the sysfs user-space
   interface

 - correct the debounce time conversion in GPIO ACPI

 - statify a struct in gpio-sim and fix a typo

 - update registers in correct order (hardware quirk) in gpio-ts4900

* tag 'gpio-fixes-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: sim: fix a typo
  gpio: ts4900: Do not set DAT and OE together
  gpio: sim: Declare gpio_sim_hog_config_item_ops static
  gpiolib: acpi: Convert ACPI value of debounce to microseconds
  gpio: Revert regression in sysfs-gpio (gpiolib.c)
  gpio: tegra186: Add IRQ per bank for Tegra241

2 years agogpio: sim: fix a typo
Bartosz Golaszewski [Tue, 8 Mar 2022 08:44:54 +0000 (09:44 +0100)]
gpio: sim: fix a typo

Just noticed this when applying Andy's patch. s/childred/children/

Fixes: cb8c474e79be ("gpio: sim: new testing module")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2 years agogpio: ts4900: Do not set DAT and OE together
Mark Featherston [Thu, 10 Mar 2022 01:16:16 +0000 (17:16 -0800)]
gpio: ts4900: Do not set DAT and OE together

This works around an issue with the hardware where both OE and
DAT are exposed in the same register. If both are updated
simultaneously, the harware makes no guarantees that OE or DAT
will actually change in any given order and may result in a
glitch of a few ns on a GPIO pin when changing direction and value
in a single write.

Setting direction to input now only affects OE bit. Setting
direction to output updates DAT first, then OE.

Fixes: 9c6686322d74 ("gpio: add Technologic I2C-FPGA gpio support")
Signed-off-by: Mark Featherston <mark@embeddedTS.com>
Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2 years agocan: gs_usb: add VID/PID for ABE CAN Debugger devices
Ben Evans [Fri, 3 Dec 2021 05:16:26 +0000 (15:16 +1000)]
can: gs_usb: add VID/PID for ABE CAN Debugger devices

Add support for ABE CAN Debugger devices using the gs_usb driver.

Link: https://lore.kernel.org/all/20220309124132.291861-22-mkl@pengutronix.de
Signed-off-by: Ben Evans <benny.j.evans92@gmail.com>
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add VID/PID for CES CANext FD devices
Peter Fink [Mon, 8 Nov 2021 10:41:57 +0000 (11:41 +0100)]
can: gs_usb: add VID/PID for CES CANext FD devices

Add support for Christ Electronic Systems GmbH
CANext FD devices using the gs_usb driver.

Link: https://lore.kernel.org/all/20220309124132.291861-21-mkl@pengutronix.de
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add extended bt_const feature
Peter Fink [Mon, 8 Nov 2021 16:05:44 +0000 (17:05 +0100)]
can: gs_usb: add extended bt_const feature

For example CANext FD needs to distinguish between bittiming constants
valid for arbitration phase and data phase to reach maximum
performance at higher speeds.

Link: https://lore.kernel.org/all/20220309124132.291861-20-mkl@pengutronix.de
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Christoph Möhring <cmoehring@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: activate quirks for CANtact Pro unconditionally
Peter Fink [Tue, 7 Dec 2021 19:18:23 +0000 (20:18 +0100)]
can: gs_usb: activate quirks for CANtact Pro unconditionally

The CANtact Pro from LinkLayer Labs is based on the LPC54616 µC, which
is affected by the NXP LPC USB transfer erratum. However, the current
firmware (version 2) doesn't set the
GS_CAN_FEATURE_REQ_USB_QUIRK_LPC546XX bit.

This patch sets the feature GS_CAN_FEATURE_REQ_USB_QUIRK_LPC546XX to
workaround this issue.

For the GS_USB_BREQ_DATA_BITTIMING USB control message the CANtact Pro
firmware uses a request value, which is already used by the
candleLight firmware for a different purpose
(GS_USB_BREQ_GET_USER_ID).

This patch set the feature GS_CAN_FEATURE_QUIRK_BREQ_CANTACT_PRO to
workaround this issue.

Link: https://lore.kernel.org/all/20220309124132.291861-19-mkl@pengutronix.de
Cc: Ryan Edwards <ryan.edwards@gmail.com>
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Christoph Möhring <cmoehring@christ-es.de>
[mkl: improve check for CANtact Pro and add GS_CAN_FEATURE_QUIRK_BREQ_CANTACT_PRO quirk]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add quirk for CANtact Pro overlapping GS_USB_BREQ value
Marc Kleine-Budde [Thu, 30 Dec 2021 19:22:07 +0000 (20:22 +0100)]
can: gs_usb: add quirk for CANtact Pro overlapping GS_USB_BREQ value

For the GS_USB_BREQ_DATA_BITTIMING USB control message the CANtact Pro
firmware uses a request value, which is already used by the
candleLight firmware for a different
purpose (GS_USB_BREQ_GET_USER_ID).

This patch adds a quirk to use the CANtact Pro's value for the
GS_USB_BREQ_DATA_BITTIMING USB control message instead of the official
one.

Link: https://lore.kernel.org/all/20220309124132.291861-18-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add usb quirk for NXP LPC546xx controllers
Peter Fink [Tue, 7 Dec 2021 18:43:24 +0000 (19:43 +0100)]
can: gs_usb: add usb quirk for NXP LPC546xx controllers

Introduce a workaround for a NXP chip errata on LPC546xx
controllers (Errata sheet LPC546xx / USB.15).

According to the document corruption can occur when the following
conditions are met:
* A TX (IN) transfer happens after a RX (OUT) transfer.
* The RX (OUT) transfer length is 4 + N * 16 (N >= 0) bytes.

Even though the struct gs_host_frame has a size of 76 bytes for a FD
frame, which does not apply to the above rule, corruption could be
seen.

Adding a dummy byte to break the second condition also on transfer
lengths with 4 + N * 8 bytes reliably circumvents USB transfer data
corruption.

The firmware can now request this quirk by setting
GS_CAN_FEATURE_REQ_USB_QUIRK_LPC546XX.

Link: https://lore.kernel.org/all/20220309124132.291861-17-mkl@pengutronix.de
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Christoph Möhring <cmoehring@christ-es.de>
Signed-off-by: Alexander Schartner <aschartner@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add CAN-FD support
Peter Fink [Tue, 7 Dec 2021 18:35:31 +0000 (19:35 +0100)]
can: gs_usb: add CAN-FD support

CANtact Pro from Linklayer is the first gs_usb compatible device
supporting CAN-FD with a different HW and re-written candlelight FW.

Support for CAN-FD is indicated by the device setting the
GS_CAN_FEATURE_FD flag. CAN-FD support is requested by the driver with
the GS_CAN_MODE_FD flag. The CAN-FD specific data bit timing
parameters are set with the GS_USB_BREQ_DATA_BITTIMING control
message.

This patch is based on the Eric Evenchick's gs_usb_fd driver (which
itself is a fork of gs_usb). The gs_usb_fd code base was reintegrated
into the gs_usb driver, and reworked to not break the existing
classical-CAN only hardware.

Link: https://lore.kernel.org/all/20220309124132.291861-16-mkl@pengutronix.de
Link: https://github.com/linklayer/gs_usb_fd/issues/2
Co-developed-by: Eric Evenchick <eric@evenchick.com>
Signed-off-by: Eric Evenchick <eric@evenchick.com>
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: use union and FLEX_ARRAY for data in struct gs_host_frame
Peter Fink [Tue, 7 Dec 2021 18:22:50 +0000 (19:22 +0100)]
can: gs_usb: use union and FLEX_ARRAY for data in struct gs_host_frame

Modify struct gs_host_frame to make use of a union and
DECLARE_FLEX_ARRAY to be able to store different data (lengths), which
will be added in later commits.

Store the gs_host_frame length in TX direction (host -> device) in
struct gs_can::hf_size_tx and RX direction (device -> host) in struct
gs_usb::hf_size_rx so it must be calculated only once.

Link: https://lore.kernel.org/all/20220309124132.291861-15-mkl@pengutronix.de
Signed-off-by: Peter Fink <pfink@christ-es.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: support up to 3 channels per device
Marc Kleine-Budde [Fri, 4 Feb 2022 14:40:31 +0000 (15:40 +0100)]
can: gs_usb: support up to 3 channels per device

Some STM32G3 chips support up to 3 CAN-FD channels, increase number of
supported channels in this driver to 3 accordingly.

Link: https://lore.kernel.org/all/20220309124132.291861-14-mkl@pengutronix.de
Suggested-by: Ryan Edwards <ryan.edwards@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: gs_usb_probe(): introduce udev and make use of it
Marc Kleine-Budde [Sun, 7 Nov 2021 14:11:55 +0000 (15:11 +0100)]
can: gs_usb: gs_usb_probe(): introduce udev and make use of it

Introduce the variable udev in the gs_usb_probe() function to hold a
pointer to the struct usb_device. This avoids recalculating the value
several times in this function.

Link: https://lore.kernel.org/all/20220309124132.291861-13-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: document the PAD_PKTS_TO_MAX_PKT_SIZE feature
Marc Kleine-Budde [Sun, 7 Nov 2021 13:52:10 +0000 (14:52 +0100)]
can: gs_usb: document the PAD_PKTS_TO_MAX_PKT_SIZE feature

The widely used open source firmware candleLight supports padding the
USB packets to max packet size to improve performance on Windows
systems.

This patch documents the bit.

Link: https://lore.kernel.org/all/20220309124132.291861-12-mkl@pengutronix.de
Link: https://github.com/candle-usb/candleLight_fw/pull/7
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: document the USER_ID feature
Marc Kleine-Budde [Sun, 7 Nov 2021 13:50:11 +0000 (14:50 +0100)]
can: gs_usb: document the USER_ID feature

The widely used open source firmware candleLight has optional support
for reading/writing of an user defined value into the device's flash.

This is indicated by the GS_CAN_FEATURE_USER_ID feature. The
corresponding request are GS_USB_BREQ_GET_USER_ID and
GS_USB_BREQ_SET_USER_ID.

This patch documents these values.

Link: https://lore.kernel.org/all/20220309124132.291861-11-mkl@pengutronix.de
Link: https://github.com/candle-usb/candleLight_fw/commit/1453d70dc9a9d98ac254893ba5114b8e826e0e39
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: update GS_CAN_FEATURE_IDENTIFY documentation
Marc Kleine-Budde [Sun, 7 Nov 2021 13:44:36 +0000 (14:44 +0100)]
can: gs_usb: update GS_CAN_FEATURE_IDENTIFY documentation

In the binary interface a feature bit might have a corresponding mode
bit (of the same value).

The GS_CAN_FEATURE_IDENTIFY feature doesn't come with a mode. Document
this, to avoid gaps when adding more features/modes later.

Link: https://lore.kernel.org/all/20220309124132.291861-10-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2 years agocan: gs_usb: add HW timestamp mode bit
Marc Kleine-Budde [Sun, 7 Nov 2021 13:36:51 +0000 (14:36 +0100)]
can: gs_usb: add HW timestamp mode bit

Newer versions of the widely used open source firmware candleLight
support hardware timestamps. The support is activated by setting the
GS_CAN_MODE_HW_TIMESTAMP in the GS_USB_BREQ_MODE request.

Although timestamp support is not yet supported by this driver, add
the missing bit for documentation purpose.

Link: https://lore.kernel.org/all/20220309124132.291861-9-mkl@pengutronix.de
Link: https://github.com/candle-usb/candleLight_fw/commit/44431f4a4354a878fbd15b273bf04fce1dcdff7e
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>