staging: wfx: le16_to_cpus() takes a reference as parameter

Original code caused an (100% reproducible) invalid memory access on
big-endian targets.

Fixes: b0998f0c040d "staging: wfx: add IRQ handling"
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191008094232.10014-4-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: remove misused call to cpu_to_le16()

Indeed, hif_msg->id is a uint8_t, so use of cpu_to_le16() is a madness.

Fixes: 9bca45f3d692 ("staging: wfx: allow to send 802.11 frames")
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191008094232.10014-3-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: simplify memory allocation in wfx_update_filtering()

Original code did not handle case where kmalloc failed. By the way, it
is more convenient to allocate and build HIF message in
hif_set_beacon_filter_table() instead of to ask to caller function to
build it.

Fixes: 40115bbc40e2 ("staging: wfx: implement the rest of mac80211 API")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191008094232.10014-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wlan-ng: p80211wep.c: use lib/crc32

Use lib/crc32 instead of another implementation.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Link: https://lore.kernel.org/r/20191006140745.9952-1-thomas@m3y3r.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vc04_services: make use of devm_platform_ioremap_resource

fix below issue reported by coccicheck
drivers/staging//vc04_services/interface/vchiq_arm/vchiq_2835_arm.c:139
WARNING: Use devm_platform_ioremap_resource for g_regs

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Link: https://lore.kernel.org/r/1570353394-9991-1-git-send-email-hariprasad.kelam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove set but not used variable 'adapter'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/core/rtw_mlme.c: In function rtw_select_roaming_candidate:
drivers/staging/rtl8723bs/core/rtw_mlme.c:2007:18: warning: variable adapter set but not used [-Wunused-but-set-variable]

It is not used since commit 554c0a3abf21 ("staging:
Add rtl8723bs sdio wifi driver")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1570352999-45790-6-git-send-email-zhengbin13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove set but not used variables 'ppp', 'type', 'data'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/core/rtw_recv.c: In function validate_80211w_mgmt:
drivers/staging/rtl8723bs/core/rtw_recv.c:1415:8: warning: variable ppp set but not used [-Wunused-but-set-variable]
drivers/staging/rtl8723bs/core/rtw_recv.c: In function validate_80211w_mgmt:
drivers/staging/rtl8723bs/core/rtw_recv.c:1403:5: warning: variable type set but not used [-Wunused-but-set-variable]
drivers/staging/rtl8723bs/core/rtw_recv.c: In function recvframe_defrag:
drivers/staging/rtl8723bs/core/rtw_recv.c:1713:6: warning: variable data set but not used [-Wunused-but-set-variable]

They are not used since commit 554c0a3abf21 ("staging:
Add rtl8723bs sdio wifi driver")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1570352999-45790-5-git-send-email-zhengbin13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove set but not used variable 'prwskeylen'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/core/rtw_security.c: In function rtw_tkip_encrypt:
drivers/staging/rtl8723bs/core/rtw_security.c:660:6: warning: variable prwskeylen set but not used [-Wunused-but-set-variable]
drivers/staging/rtl8723bs/core/rtw_security.c: In function rtw_tkip_decrypt:
drivers/staging/rtl8723bs/core/rtw_security.c:768:6: warning: variable prwskeylen set but not used [-Wunused-but-set-variable]
drivers/staging/rtl8723bs/core/rtw_security.c: In function rtw_aes_encrypt:
drivers/staging/rtl8723bs/core/rtw_security.c:1528:6: warning: variable prwskeylen set but not used [-Wunused-but-set-variable]

It is not used since commit 554c0a3abf21 ("staging:
Add rtl8723bs sdio wifi driver")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1570352999-45790-4-git-send-email-zhengbin13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove set but not used variable 'tmp_aid'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/core/rtw_sta_mgt.c: In function rtw_alloc_stainfo:
drivers/staging/rtl8723bs/core/rtw_sta_mgt.c:190:7: warning: variable tmp_aid set but not used [-Wunused-but-set-variable]

It is not used since commit 554c0a3abf21 ("staging:
Add rtl8723bs sdio wifi driver")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1570352999-45790-3-git-send-email-zhengbin13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: align arguments with open parenthesis in file rtl8712_led.c

Cleans up checks of "Alignment should match open parenthesis"

Signed-off-by: Gabriela Bittencourt <gabrielabittencourt00@gmail.com>
Link: https://lore.kernel.org/r/20191007003902.21911-1-gabrielabittencourt00@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Switch constant place in test

Switch constant place as it should be on the right side of the test.
Issue found by checkpatch.

Signed-off-by: Javier F. Arias <jarias.linux@gmail.com>
Link: https://lore.kernel.org/r/20191007033202.45czxuochtylkddf@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vt6656: reorganize characters so the lines are under 80 ch

Cleans up warnings of "line over 80 characters"

Signed-off-by: Gabriela Bittencourt <gabrielabittencourt00@gmail.com>
Link: https://lore.kernel.org/r/20191006194030.8854-1-gabrielabittencourt00@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove unnecessary braces

Remove braces that are not necessary for any arm of this statement.
Issue found by checkpatch.

Signed-off-by: Javier F. Arias <jarias.linux@gmail.com>
Link: https://lore.kernel.org/r/20191006230327.GA4168@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vt6656: remove duplicated blank line

Cleans up checks of "don't use multiple blank line"

Signed-off-by: Gabriela Bittencourt <gabrielabittencourt00@gmail.com>
Reviewed-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Link: https://lore.kernel.org/r/20191006195854.9843-1-gabrielabittencourt00@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: mt7621-pci: add quirks for 'E2' revision using 'soc_device_attribute'

Depending on revision of the chip, reset lines are inverted. Make code
more readable making use of 'soc_device_match' in driver probe function.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20191006181032.19112-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Fix indentation for cleaner code

Fixes indentation for if condition in the file r8190_rtl8256.c for
better readability as suggested by Dan Carpenter.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/20191006105300.10181-1-sylphrenadin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove set but not used variable 'oldcnt'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/hal/sdio_ops.c: In function sdio_read_port:
drivers/staging/rtl8723bs/hal/sdio_ops.c:430:6: warning: variable oldcnt set but not used [-Wunused-but-set-variable]

It is not used since commit dedf215bd1c7 ("staging:
rtl8723bs: remove unused code")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Link: https://lore.kernel.org/r/1570354382-86879-1-git-send-email-zhengbin13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: remove unnecessary asignment and initialization

Variable badworden is asigned in two subsequent lines. So the first
asignment is useless and not needed. Also the initialization to zero
is not needed. Remove the first asignment and the initialization.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191005141852.88712-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: don't use wdev while setting tx power

WILC doesn't support per-vif tx power, and hence, wdev will always be
null in calls to set_tx_power.
Instead, wiphy should be used to execute the operation

Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Link: https://lore.kernel.org/r/20191004214011.7623-1-adham.abozaeid@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Remove unnecessary braces

Remove unnecessary braces for single statement block.
Issue found by checkpatch.

Signed-off-by: Javier F. Arias <jarias.linux@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Link: https://lore.kernel.org/r/20191006133016.GA22297@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Refill empty buffer queues from wq

When operating at mtu 9000, qlge does order-1 allocations for rx buffers in
atomic context. This is especially unreliable when free memory is low or
fragmented. Add an approach similar to commit 3161e453e496 ("virtio: net
refill on out-of-memory") to qlge so that the device doesn't lock up if
there are allocation failures.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-18-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Refill rx buffers up to multiple of 16

Reading the {s,l}bq_prod_idx registers on a running device, it appears that
the adapter will only use buffers up to prod_idx & 0xfff0. The driver
currently uses fixed-size guard zones (16 for sbq, 32 for lbq - don't know
why this difference). After the previous patch, this approach no longer
guarantees prod_idx values aligned on multiples of 16. While it appears
that we can write unaligned values to prod_idx without ill effects on
device operation, it makes more sense to change qlge_refill_bq() to refill
up to a limit that corresponds with the device's behavior.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-17-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Update buffer queue prod index despite oom

Currently, if we repeatedly fail to allocate all of the buffers from the
desired batching budget, we will never update the prod_idx register.
Restructure code to always update prod_idx if new buffers could be
allocated. This eliminates the current two stage process (clean_idx ->
prod_idx) and some associated bookkeeping variables.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-16-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Replace memset with assignment

Instead of clearing the structure wholesale, it is sufficient to initialize
the skb member which is used to manage sbq instances. lbq instances are
managed according to curr_idx and clean_idx.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-15-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove useless memset

This just repeats what the other memset a few lines above did.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-14-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove qlge_bq.len & size

Given the way the driver currently works, these values are always known
at compile time.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-13-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Factor out duplicated expression

Given that (u16) 65536 == 0, that expression can be replaced by a simple
cast.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-12-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove rx_ring.type

This field is redundant, the type can be determined from the index, cq_id.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-11-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Fix dma_sync_single calls

Using the unmap addr elsewhere than unmap calls is a misuse of the dma api.
In prevision of this fix, qlge kept two copies of the dma address around ;)

Fixes: c4e84bde1d59 ("qlge: New Qlogic 10Gb Ethernet Driver.")
Fixes: 7c734359d350 ("qlge: Size RX buffers based on MTU.")
Fixes: 2c9a266afefe ("qlge: Fix receive packets drop.")
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-10-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Deduplicate rx buffer queue management

The qlge driver (and device) uses two kinds of buffers for reception,
so-called "small buffers" and "large buffers". The two are arranged in
rings, the sbq and lbq. These two share similar data structures and code.

Factor out data structures into a common struct qlge_bq, make required
adjustments to code and dedup the most obvious cases of copy/paste.

This patch should not introduce any functional change other than to some of
the printk format strings.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-9-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove useless dma synchronization calls

This is unneeded for two reasons:
1) the cpu does not write data for the device in the mapping
2) calls like ..._sync_..._for_device(..., ..._FROMDEVICE) are
   nonsensical, see commit 3f0fb4e85b38 ("Documentation/DMA-API-HOWTO.txt:
   fix misleading example")

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-8-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove rx_ring.sbq_buf_size

Tx completion rings have sbq_buf_size = 0 but there's no case where the
code actually tests on that value. We can remove sbq_buf_size and use a
constant instead.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20190927101210.23856-7-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove bq_desc.maplen

The size of the mapping is known statically in all cases, there's no need
to save it at runtime. Remove this member.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Acked-by: Manish Chopra <manishc@marvell.com>
Link: https://lore.kernel.org/r/20190927101210.23856-6-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Deduplicate lbq_buf_size

lbq_buf_size is duplicated to every rx_ring structure whereas lbq_buf_order
is present once in the ql_adapter structure. All rings use the same buf
size, keep only one copy of it. Also factor out the calculation of
lbq_buf_size instead of having two copies.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20190927101210.23856-5-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove page_chunk.last_flag

As already done in ql_get_curr_lchunk(), this member can be replaced by a
simple test.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Acked-by: Manish Chopra <manishc@marvell.com>
Link: https://lore.kernel.org/r/20190927101210.23856-4-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Remove irq_cnt

qlge uses an irq enable/disable refcounting scheme that is:
* poorly implemented
Uses a spin_lock to protect accesses to the irq_cnt atomic
variable.
* buggy
Breaks when there is not a 1:1 sequence of irq - napi_poll, such as
when using SO_BUSY_POLL.
* unnecessary
The purpose or irq_cnt is to reduce irq control writes when
multiple work items result from one irq: the irq is re-enabled
after all work is done.
Analysis of the irq handler shows that there is only one case where
there might be two workers scheduled at once, and those have
separate irq masking bits.

Therefore, remove irq_cnt.

Additionally, we get a performance improvement:
perf stat -e cycles -a -r5 super_netperf 100 -H 192.168.33.1 -t TCP_RR

Before:
628560
628056
622103
622744
627202
[...]
   268,803,947,669      cycles                 ( +-  0.09% )

After:
636300
634106
634984
638555
634188
[...]
   259,237,291,449      cycles                 ( +-  0.19% )

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-3-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Fix irq masking in INTx mode

Tracing the driver operation reveals that the INTR_EN_EN bit (per-queue
interrupt control) does not immediately prevent rx completion interrupts
when the device is operating in INTx mode. This leads to interrupts being
raised while napi is scheduled/running. Those interrupts are ignored by
qlge_isr() and falsely reported as IRQ_NONE thanks to the irq_cnt scheme.
This in turn can cause frames to loiter in the receive queue until a later
frame leads to another rx interrupt that will schedule napi.

Use the INTR_EN_EI bit (master interrupt control) instead.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-2-bpoirier@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: implement the rest of mac80211 API

Finish to fill struct ieee80211_ops with necessary callbacks. Driver is
now ready to be registered to mac80211.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-21-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: implement 802.11 key handling

wfx_set_key() mostly copy bytes on correct offsets. A big piece of code
for a simple work. Unfortunately, I did not found any way to factorize
it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-20-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: allow to scan networks

Chip can make foreground scan or background, but both can't be mixed in
same request. So, we need to split each mac80211 requests into multiple
HIF requests.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: allow to receive 802.11 frames

Again, this task is more complex than it should since driver try to
handle itself power saving of stations.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-18-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: allow to send 802.11 frames

Three things make this task more complex than it should:
  - Chip necessitate to associate a link-id to each station. It is same
    thing than association ID but, using 8 bits only.
  - Rate policy is sent separately from Tx frames
  - Driver try to handle itself power saving of stations and multicast
    data

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-17-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add debug files and trace debug events

Add traces when debug events happen and allow to ask internal
information to chip.

These features work independently from mac80211.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-16-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: setup initial chip configuration

A few tasks remain to be done in order to finish chip initial
configuration:
   - configure chip to use multi-tx confirmation (speed up data
     transfer)
   - configure chip to use wake-up feature (save power consumption
     during runtime)
   - set hardware configuration (clocks, RF, pinout, etc...) using a
     Platform Data Set (PDS) file

On release, driver completely shutdown the chip to save power
consumption.

Documentation about PDS and PDS data for sample boards are available
here[1]. One day, PDS data may find a place in device tree but,
currently, PDS is too much linked with firmware to allowing that.

This patch also add "send_pds" file in debugfs to be able to dynamically
change PDS (only for debug, of course).

[1]: https://github.com/SiliconLabs/wfx-firmware/tree/master/PDS

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-15-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: introduce "secure link"

Chip support encryption of the link between host and chip. This feature
is called "secure link". Driver code on github[1] support it. However,
it relies on mbedtls for cryptographic functions. So, I decided to not
import this feature in current patch. However, in order to keep code
synchronized between github and kernel, I imported all code related to
this feature, even if most of it is just no-op.

[1]: https://github.com/SiliconLabs/wfx-linux-driver/

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-14-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add HIF commands helpers

Provide an abstraction for HIF commands.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-13-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: allow to send commands to chip

Chip has multiple input buffers and can handle multiple 802.11 frames
in parallel. However, other HIF command must be sent sequentially.
wsm_send_cmd() handles these requests.

This commit also add send_hif_cmd in debugfs. This file allows to send
arbitrary commands to chip. It can be used for debug and testing.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-12-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: instantiate mac80211 data

Allocate a struct ieee80211_hw but do not yet register it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-11-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add support for start-up indication

Once firmware is loaded, it send a first indication to host. This
indication signalize that host can start to communicate with firmware.
In add, it contains information about chip and firmware (MAC addresses,
firmware version, etc...).

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-10-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add tracepoints for HIF

These tracepoints decode HIF headers and provide more human readable
results.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-9-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add IRQ handling

bh_work() is in charge to schedule all HIF message from/to chip.

On normal operation, when an IRQ is received, driver can get size of
next message in control register. In order to save control register
access, when chip send a message, it also appends a copy of control
register after the message (this register is not accounted in message
length declared in message header, but must accounted in bus request).
This copy of control register is called "piggyback".

It also handles a power saving mechanism specific to WFxxx series. This
mechanism is based on a GPIO called "wakeup" GPIO. Obviously, this gpio
is not part of SPI/SDIO standard buses and must be declared
independently (this is the main reason for why SDIO mode try to get
parameters from DT).

When wakeup is enabled, host can communicate with chip only if it is
awake. To wake up chip, there are two cases:
    - host receive an IRQ from chip (chip initiate communication): host
      just have to set wakeup GPIO before reading data
    - host want to send data to chip: host set wakeup GPIO, then wait
      for an IRQ (in fact, wait for an empty message) and finally send data

bh_work() is also in charge to track usage of chip buffers. Normally
each request expect a confirmation. However, you can notice that special
"multi tx" confirmation can acknowledge multiple requests at time.

Finally, note that wfx_bh_request_rx() is not atomic (because of
control_reg_read()). So, in SPI mode, hard-irq handler only postpone all
processing to wfx_spi_request_rx().

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-8-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: import HIF API headers

These files are shared with firmware sources. Only a subset of these
definitions are used by driver but, for now, it is easier to import all.

API defines 3 kinds of messages:
   - Requests (req) are sent from host to chip
   - Confirmations (cnf) are sent by chip and are always in reply to a
     request
   - Indications (ind) are spontaneous message from chip to host

One request normally generate one confirmation. There are a few
exceptions to this rule:
   - "shutdown" request is not acknowledged
   - multiple tx request can be acknowledged a unique "multi-tx"
     confirmation

In add, API defines MIB. They are sub-structures for write_mib and
read_mib API.

Note that all numbers in API have to be little endian when sent/received
from/to chip (I didn't declared them with __le32 because driver also use
them internally).

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-7-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: load firmware

A firmware is necessary to run the chip. wfx_init_device() is in charge
of loading firmware on chip and doing low level initialization.

Firmwares for WF200 are available here:

  https://github.com/SiliconLabs/wfx-firmware/

Note that firmware are encrypted. Driver checks that key used to encrypt
firmware match with key burned into chip.

Currently, "C0" key is used for production chips.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-6-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add tracepoints for I/O access

Some tracepoints are useful for debugging.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-5-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add I/O API

hwio.c provides an abstraction to access different types of register of
the chip.

Note that only data register (aka FRAME_OUT) and control register are
used normal communication. Other registers are only used during chip
start up.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-4-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add support for I/O access

Introduce bus level communication layer. At this level, 7 registers can
be addressed.

Notice that SPI driver is able to manage chip reset. SDIO mode relies
on an external driver (`mmc-pwrseq`) to reset chip.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-3-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wfx: add infrastructure for new driver

Instantiate build infrastructure WFx driver. This driver provides support
for Wifi chipset Silicon Labs WF200 and further:

   https://www.silabs.com/documents/public/data-sheets/wf200-datasheet.pdf

This chip support SPI and SDIO bus.

SDIO interface has two particularities:
    1. Some parameters may be useful for end user (I will talk about
       gpio_wakeup later).
    2. The SDIO VID and PID of WF200 are 0000:0001 which are too much
       generic to rely on.

So, current code checks VID/PID and looks for a node in DT (since WF200
targets embedded platforms, I don't think it is a problem to rely on
DT). DT can also be used to define to parameters for driver. Currently,
if no node is found, a warning is emitted, but it could be changed in
error.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: exfat: explain the fs_sync() issue in TODO

We've seen several incorrect patches for fs_sync() calls in the exfat driver.
Add code to the TODO that explains this isn't just a delete code and refactor,
but that actual analysis of when the filesystem should be flushed to disk
needs to be done.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Link: https://lore.kernel.org/r/9837.1570042895@turing-police
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: exfat: fix fs_sync() calls.

The majority of them were totally backwards.  Change the logic
so that if DELAYED_SYNC *isn't* in the config, we actually flush to disk
before flagging the file system as clean.

That leaves two calls in the DELAYED_SYNC case.  More detailed
analysis is needed to make sure that's what's really needed, or if other
call sites also need a fs_sync() call.  This patch is at least "less wrong"
than the code was, but further changes should be another patch.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Link: https://lore.kernel.org/r/11092.1570043784@turing-police
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: cleanup comments in update_hw_ht_param

Cleanup comments in update_hw_ht_param to follow kernel coding style
and avoid line length over 80 characters.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191003122514.1760-5-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: cleanup whitespace in update_hw_ht_param

Replace tabs with spaces in declarations and reomve two blank lines in
update_hw_ht_param to cleanup whitespace and improve readability.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191003122514.1760-4-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: rename variables to avoid mixed case

Rename the local varibles max_AMPDU_len and min_MPDU_spacing to avoid
mixed case.

max_AMPDU_len -> max_ampdu_len
min_MPDU_spacing -> min_mpdu_spacing

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191003122514.1760-3-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: convert variables from unsigned char to u8

Convert the local variables max_AMPDU_len and min_MPDU_spacing from
unsigned char to u8 and remove unnecessary castings to u8 pointer.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191003122514.1760-2-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: fix boundary condition for n

Now that snprintf is replaced by scnprintf n >= MAX_WPA_IE_LEN doesn't
make sense as the maximum value n can take is MAX_WPA_IE_LEN.

Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20191002170518.GA1688@SARKAR
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vc04_services: Avoid typedef

Avoid typedefs to maintain kernel coding style. Issue found by
checkpatch.pl

Replace the enum typedef VCHIQ_REASON_T with vchiq_reason.

Signed-off-by: Nachammai Karuppiah <nachukannan@gmail.com>
Link: https://lore.kernel.org/r/1570125797-24410-1-git-send-email-nachukannan@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: fieldbus: move "offline mode" definition to fieldbus core

anybus-s cards use the "offline mode" property to determine if
process memory should be clear, set, or frozen when the card
is offline.

Move this property to the fieldbus core, so that it can become
part of the future fieldbus config interface.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Link: https://lore.kernel.org/r/20190918183552.28959-3-TheSven73@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: fieldbus core: remove unused strings

Remove two unused static const strings - a leftover from
a previous stage. Interestingly, neither gcc nor sparse
warned about their presence.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Link: https://lore.kernel.org/r/20190918183552.28959-2-TheSven73@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: look for rtc_clk clock in spi mode

If rtc_clk is provided from DT, use it and enable it.
This is optional.
The signal may be hardcoded and no need to be requested,
but if DT provides it, use it.

Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Link: https://lore.kernel.org/r/20190916193701.20755-1-adham.abozaeid@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: use RCU list to maintain vif interfaces list

Make use of RCU list to maintain virtual interfaces instead of an array.
The update operation on 'vif' list is less compare to the read
operations. Mostly the 'vif' list elements are accessed for the read
operation, so RCU list is more suited for this requirement.
The shifting of interface index id's during the delete interface is not
required. As the firmware only supports 2 interfaces so make use of
available free slot index id during add interface.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20190926151436.27819-3-ajay.kathat@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: move wlan_deinit_locks() in wilc_netdev_cleanup()

Move deinitialization of lock during the module remove and the
initialization of lock wilc_cfg80211_init(). This to ensure locks are
available during module load and gets free during unload.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20190926151436.27819-2-ajay.kathat@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: wilc1000: remove unnecessary netdev validation check in del_key()

Removed unnecessary check to compare vif interface with zeroth index
element in vif array. Already the caller takes care of passing the
appropriate netdev handler during the del key operation.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Link: https://lore.kernel.org/r/20190926151436.27819-1-ajay.kathat@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: fix possible null dereference

Inside a nested 'else' block at the beginning of this function is a
call that assigns 'psta' to the return value of 'rtw_get_stainfo()'.
If 'rtw_get_stainfo()' returns NULL and the flow of control reaches
the 'else if' where 'psta' is dereferenced, then we will dereference
a NULL pointer.

Fix this by checking if 'psta' is not NULL before reading its
'psta->qos_option' data member.

Addresses-Coverity: ("Dereference null return value")

Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20190926150317.5894-1-connor.kuehl@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: remove unused function write_cam_from_cache

Function write_cam_from_cache in rtw_wlan_util.c is never used,
so remove it.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20190926175933.44967-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: vt6656: clean up an indentation issue

There is a block of code that is indented incorrectly, add in the
missing tabs.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Quentin Deslandes <quentin.deslandes@itdev.co.uk>
Link: https://lore.kernel.org/r/20190927092400.20213-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192e: clean up indentation issue

The RT_TRACE is indented incorrectly, add in the missing tabs.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190926125057.16158-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: remove dead code/vestigial do..while loop

The local variable 'bcmd_down' is always set to true almost immediately
before the do-while's condition is checked. As a result, !bcmd_down
evaluates to false which short circuits the logical AND operator meaning
that the second operand is never reached and is therefore dead code.

Furthermore, the do..while loop may be removed since it will always only
execute once because 'bcmd_down' is always set to true, so the
!bcmd_down evaluates to false and the loop exits immediately after the
first pass.

Fix this by removing the loop and its condition variables 'bcmd_down'
and 'retry_cnts'

While we're in there, also fix some checkpatch.pl suggestions regarding
spaces around arithmetic operators like '+'

Addresses-Coverity: ("Logically dead code")

Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Link: https://lore.kernel.org/r/20190924142819.5243-1-connor.kuehl@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: olpc_dcon: fix wrong dependencies in Kconfig file

To allow simultaneous support for XO-1 and XO-1.5.
This module require GPIO_CS5535 (for 1.0) and ACPI (for 1.5) now.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jerry Lin <wahahab11@gmail.com>
Link: https://lore.kernel.org/r/20190925074243.GA24947@compute1
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: Use pr_warn instead of pr_warning

As said in commit f2c2cbcc35d4 ("powerpc: Use pr_warn instead of
pr_warning"), removing pr_warning so all logging messages use a
consistent <prefix>_warn style. Let's do it.

Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Link: https://lore.kernel.org/r/20190920062544.180997-22-wangkefeng.wang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: fix multiple memory leaks on error path

In rtl8192_tx on error handling path allocated urbs and also skb should
be released.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Link: https://lore.kernel.org/r/20190920025137.29407-1-navid.emamdoost@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: release memory on error path

In rtl819xU_tx_cmd if usb_submit_urb fails the allocated memories should
be released.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Link: https://lore.kernel.org/r/20190920014303.31410-1-navid.emamdoost@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: qlge: Removed unnecessary variable

coccicheck reported warning for unnecessary variable used.
This patch fixes the same by removing the variable and
returning value directly.

Signed-off-by: Aliasgar Surti <aliasgar.surti500@gmail.com>
Link: https://lore.kernel.org/r/1568812596-25926-1-git-send-email-aliasgar.surti500@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: Replace snprintf with scnprintf

When the number of bytes to be printed exceeds the limit snprintf
returns the number of bytes that would have been printed (if there was
no truncation). This might cause issues, hence use scnprintf which
returns the actual number of bytes printed to buffer always.

Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Link: https://lore.kernel.org/r/20190910184931.GA8228@SARKAR
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: olpc_dcon: allow simultaneous XO-1 and XO-1.5 support

This patch remove model related configuration.
Since the module can decide which platform data to use itself base on
current running olpc board.

Also change module dependency from (GPIO_CS5535 || GPIO_CS5535=n)
to (GPIO_CS5535 || ACPI) because original one does not make any sense
and module only doing real work when GPIO_CS5535 or ACPI is setted.

Remove kernel configurations:
- FB_OLPC_DCON_1
- FB_OLPC_DCON_1_5

Signed-off-by: Jerry Lin <wahahab11@gmail.com>
Link: https://lore.kernel.org/r/20190906010613.GA562@compute1
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Remove unnecessary line-breaks in function signatures

This patch fixes the function signatures for rtl8192_handle_assoc_response,
rtl8192_record_rxdesc_forlateruse, rtl819xusb_process_received_packet
and other relevant code blocks to avoid the checkpatch.pl warning:

CHECK: Lines should not end with a '('

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/ed06fc34eecd883f02bb9a037522b65c63a5eec4.1568814125.git.sylphrenadin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Fix alignment to match open parenthesis

This patch fixes the file r8192U_core.c to avoid the checkpatch.pl
warning:
CHECK: Alignment should match open parenthesis

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/07a4311b70ed22833a01a9067418639905041cb7.1568814125.git.sylphrenadin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: Remove unnecessary blank lines

This patch fixes the file r8192U_core.c to avoid the chechpatch.pl
warnings:

CHECK: Please don't use multiple blank lines
CHECK: Blank lines aren't necessary before a close brace '}'

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/95ce1564a34ff65e51fd63a241713e23e12dac91.1568814125.git.sylphrenadin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8192u: ieee80211: Replace snprintf with scnprintf

When the number of bytes to be printed exceeds the limit snprintf
returns the number of bytes that would have been printed (if there was
no truncation). This might cause issues, hence use scnprintf which
returns the actual number of bytes printed to buffer always.

Signed-off-by: Rohit Sarkar <rohitsarkar5398@gmail.com>
Link: https://lore.kernel.org/r/20190910182415.GA5768@SARKAR
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: board: use appropriate macro to initialize struct

Make code more readable by using macros defined for initializing
struct resource

Signed-off-by: Aurabindo Jayamohanan <mail@aurabindo.in>
Link: https://lore.kernel.org/r/20190919113945.13700-1-mail@aurabindo.in
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: remove unnecessary self-assignment

This is a self-assignment which is redundant. Fix this by removing the
self-assignment.

Addresses-Coverity: ("Self assignment")

Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Link: https://lore.kernel.org/r/20190920094807.9217-1-connor.kuehl@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8188eu: cleanup long line in rtw_mlme_ext.c

Remove comparsion to NULL and unnecessary parentheses to avoid line
length over 80 characters and follow kernel coding style.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20190912114257.17529-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: sm750fb: CHECK: Avoid CamelCase

This patch fixes the checkpatch.pl warning: CHECK: Avoid CamelCase for
the following files:

drivers/staging/sm750fb/ddk750_chip.c
drivers/staging/sm750fb/ddk750_chip.h
drivers/staging/sm750fb/ddk750_mode.c

Signed-off-by: Ido Tamir <ido.tamir@gmail.com>
Link: https://lore.kernel.org/r/20190906112241.GA2144@ubuntu-kernel
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: remove return statements from void functions

Remove unnecessary return statements from void functions reported by
checkpatch.

WARNING: void function return statements are not generally useful

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20190914115634.67874-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: remove unneeded conversion to bool

Relational and logical operators evaluate to bool,
explicit conversion is overly verbose and unneeded.

This issue found using - Coccinelle (http://coccinelle.lip6.fr)

Signed-off-by: Saiyam Doshi <saiyamdoshi.in@gmail.com>
Link: https://lore.kernel.org/r/20190912145346.GA9013@SD.eic.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: core: make array op_class static const, makes object smaller

Don't populate the array op_class on the stack but instead make it
static const. Makes the object code smaller by 64 bytes.

Before:
   text    data     bss     dec     hex filename
  93553    7944    5056  106553   1a039 rtl8723bs/core/rtw_mlme_ext.o

After:
   text    data     bss     dec     hex filename
  93425    8008    5056  106489   19ff9 rtl8723bs/core/rtw_mlme_ext.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190906175021.25103-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: os_dep: fix spelling mistake "offet" -> "offset"

There is a spelling mistake in a DBG_871X error message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190916092211.32646-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8723bs: Removed unneeded variables

coccicheck reported warning for unneeded variable used.

This patch removes the unneeded variables.

Signed-off-by: Aliasgar Surti <aliasgar.surti500@gmail.com>
Link: https://lore.kernel.org/r/1568798749-9855-1-git-send-email-aliasgar.surti500@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Linux 5.4-rc1

Merge tag 'for-5.4-rc1-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "A bunch of fixes that accumulated in recent weeks, mostly material for
  stable.

  Summary:

   - fix for regression from 5.3 that prevents to use balance convert
     with single profile

   - qgroup fixes: rescan race, accounting leak with multiple writers,
     potential leak after io failure recovery

   - fix for use after free in relocation (reported by KASAN)

   - other error handling fixups"

* tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: qgroup: Fix reserved data space leak if we have multiple reserve calls
  btrfs: qgroup: Fix the wrong target io_tree when freeing reserved data space
  btrfs: Fix a regression which we can't convert to SINGLE profile
  btrfs: relocation: fix use-after-free on dead relocation roots
  Btrfs: fix race setting up and completing qgroup rescan workers
  Btrfs: fix missing error return if writeback for extent buffer never started
  btrfs: adjust dirty_metadata_bytes after writeback failure of extent buffer
  Btrfs: fix selftests failure due to uninitialized i_mode in test inodes

Merge tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux

Pull csky updates from Guo Ren:
 "This round of csky subsystem just some fixups:

   - Fix mb() synchronization problem

   - Fix dma_alloc_coherent with PAGE_SO attribute

   - Fix cache_op failed when cross memory ZONEs

   - Optimize arch_sync_dma_for_cpu/device with dma_inv_range

   - Fix ioremap function losing

   - Fix arch_get_unmapped_area() implementation

   - Fix defer cache flush for 610

   - Support kernel non-aligned access

   - Fix 610 vipt cache flush mechanism

   - Fix add zero_fp fixup perf backtrace panic

   - Move static keyword to the front of declaration

   - Fix csky_pmu.max_period assignment

   - Use generic free_initrd_mem()

   - entry: Remove unneeded need_resched() loop"

* tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux:
  csky: Move static keyword to the front of declaration
  csky: entry: Remove unneeded need_resched() loop
  csky: Fixup csky_pmu.max_period assignment
  csky: Fixup add zero_fp fixup perf backtrace panic
  csky: Use generic free_initrd_mem()
  csky: Fixup 610 vipt cache flush mechanism
  csky: Support kernel non-aligned access
  csky: Fixup defer cache flush for 610
  csky: Fixup arch_get_unmapped_area() implementation
  csky: Fixup ioremap function losing
  csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range
  csky/dma: Fixup cache_op failed when cross memory ZONEs
  csky: Fixup dma_alloc_coherent with PAGE_SO attribute
  csky: Fixup mb() synchronization problem

Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Olof Johansson:
 "A few fixes that have trickled in through the merge window:

   - Video fixes for OMAP due to panel-dpi driver removal

   - Clock fixes for OMAP that broke no-idle quirks + nfsroot on DRA7

   - Fixing arch version on ASpeed ast2500

   - Two fixes for reset handling on ARM SCMI"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: aspeed: ast2500 is ARMv6K
  reset: reset-scmi: add missing handle initialisation
  firmware: arm_scmi: reset: fix reset_state assignment in scmi_domain_reset
  bus: ti-sysc: Remove unpaired sysc_clkdm_deny_idle()
  ARM: dts: logicpd-som-lv: Fix i2c2 and i2c3 Pin mux
  ARM: dts: am3517-evm: Fix missing video
  ARM: dts: logicpd-torpedo-baseboard: Fix missing video
  ARM: omap2plus_defconfig: Fix missing video
  bus: ti-sysc: Fix handling of invalid clocks
  bus: ti-sysc: Fix clock handling for no-idle quirks