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Anton Vorontsov [Mon, 16 Mar 2009 21:14:05 +0000 (00:14 +0300)]
mmc: Add OpenFirmware bindings for SDHCI driver
This patch adds a new driver: sdhci-of. The driver is similar to
the sdhci-pci, it contains common probe code, and controller-specific
ops and quirks.
So far there are only Freescale eSDHC ops and quirks.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:14:03 +0000 (00:14 +0300)]
sdhci: Add quirk for forcing maximum block size to 2048 bytes
FSL eSDHC controllers can support maximum block size up to 4096 bytes,
the MBL (Maximum Block Length) field in the capabilities register
extended by one bit, and is set to 0x3.
But the SDHCI core doesn't support blocks of 4096 bytes, and thus
forces blksz to the lowest value -- 512 bytes. With this patch we can
pin up the blksz to the maximum supported block size, i.e. 2048 bytes.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:14:02 +0000 (00:14 +0300)]
sdhci: Add quirk for controllers that need IRQ re-init after reset
FSL eSDHC controllers losing signal/interrupt enable states after
reset, so we should re-enable them.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:14:00 +0000 (00:14 +0300)]
sdhci: Add quirk for controllers that need small delays for PIO
Small udelay is needed to make eSDHC work in PIO mode. Without
the delay reading causes endless interrupt storm, and writing
corrupts data. The first guess would be that we must wait for
some bit in some register, but I didn't find any reliable bits
that change before and after the delay.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:59 +0000 (00:13 +0300)]
sdhci: Add set_clock callback and a quirk for nonstandard clocks
FSL eSDHC hosts have incompatible register map to manage the SDCLK.
This patch adds set_clock callback so that drivers could overwrite
set_clock behaviour.
Similar patch[1] was posted by Ben Dooks, though in Ben's version the
callback is named change_clock, plus the patch has some unrelated bits
that makes the patch difficult to reuse.
[1] http://lkml.org/lkml/2008/12/2/160
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Ben Dooks [Mon, 16 Mar 2009 21:13:57 +0000 (00:13 +0300)]
sdhci: Add get_{max,timeout}_clock callbacks
Some controllers do not provide clock information in their capabilities
(in the Samsung case, it is because there are multiple clock sources
available to the controller). Add hooks to allow the system to supply
clock information.
p.s.
In the original Ben's patch there was a bug that makes sdhci_add_host()
return -ENODEV even if callbacks were specified. This is fixed now.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:54 +0000 (00:13 +0300)]
sdhci: Add support for hosts reporting inverted write-protect state
This patch adds SDHCI_QUIRK_INVERTED_WRITE_PROTECT quirk. When
specified, the sdhci driver will invert WP state.
p.s. Actually, the quirk is more board-specific than
controller-specific.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:52 +0000 (00:13 +0300)]
sdhci: Add support for card-detection polling
This patch adds SDHCI_QUIRK_BROKEN_CARD_DETECTION quirk. When specified,
sdhci driver will set MMC_CAP_NEEDS_POLL MMC host capability, and won't
enable card insert/remove interrupts.
This is needed for hosts with unreliable card detection, such as FSL
eSDHC. The original eSDHC driver was tring to "debounce" card-detection
IRQs by reading present state and disabling particular interrupts. But
with this debouncing scheme I noticed that sometimes we miss card
insertion/removal events.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:50 +0000 (00:13 +0300)]
sdhci: Enable only relevant (DMA/PIO) interrupts during transfers
Some hosts (that is, FSL eSDHC) throw PIO interrupts during DMA
transfers, this causes tons of unneeded interrupts, and thus highly
degraded speed.
This patch modifies the driver so that now we only enable relevant
(DMA or PIO) interrupts during transfers.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:48 +0000 (00:13 +0300)]
sdhci: Split card-detection IRQs management from sdhci_init()
Card detection interrupts should be handled separately as they should
not be enabled before mmc_add_host() returns and should be disabled
before calling mmc_remove_host(). The same is for suspend and resume
routines.
sdhci_init() no longer enables card-detection irqs. Instead, two new
functions implemented: sdhci_enable_card_detection() and
sdhci_disable_card_detection().
New sdhci_reinit() call implemented to behave the same way as the old
sdhci_init().
Also, this patch implements and uses few new helpers to manage IRQs in
a more conveinient way, that is:
- sdhci_clear_set_irqs()
- sdhci_unmask_irqs()
- sdhci_mask_irqs()
- SDHCI_INT_ALL_MASK constant
sdhci_enable_sdio_irq() converted to these new helpers, plus the
helpers will be used by the subsequent patches.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Anton Vorontsov [Mon, 16 Mar 2009 21:13:46 +0000 (00:13 +0300)]
sdhci: Add support for bus-specific IO memory accessors
Currently the SDHCI driver works with PCI accessors (write{l,b,w} and
read{l,b,w}).
With this patch drivers may change memory accessors, so that we can
support hosts with "weird" IO memory access requirments.
For example, in "FSL eSDHC" SDHCI hardware all registers are 32 bit
width, with big-endian addressing. That is, readb(0x2f) should turn
into readb(0x2c), and readw(0x2c) should be translated to
le16_to_cpu(readw(0x2e)).
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Wolfgang Muees [Mon, 16 Mar 2009 11:23:03 +0000 (12:23 +0100)]
mmc_spi: adjust for delayed data token response
Some cards are not able to send the data token in time, but
miss the time frame for some bits(!). So synchronize to the
start of the token.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Thu, 12 Mar 2009 15:08:26 +0000 (17:08 +0200)]
omap_hsmmc: Wait for SDBP
It is necessary to wait for bus power before sending
any commands.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Grazvydas Ignotas [Sat, 3 Jan 2009 10:36:13 +0000 (10:36 +0000)]
omap_hsmmc: Fix MMC3 dma
Data transfers on third OMAP3 MMC controller don't work
because DMA line numbers are only defined for MMC1 and MMC2.
Fix that and store line numbers in mmc_omap_host structure
to reduce code size.
Tested on OMAP3 pandora board.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Jarkko Lavinen [Thu, 12 Mar 2009 13:30:58 +0000 (15:30 +0200)]
omap_hsmmc: Disable SDBP at suspend
Turn off the bus power at suspend.
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Fri, 30 Jan 2009 08:59:31 +0000 (10:59 +0200)]
omap_hsmmc: Do not prefix slot name
Allow slot_name to be the same as the other OMAP
driver, by removing the redundant "slot:" prefix.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Mon, 26 Jan 2009 11:17:25 +0000 (13:17 +0200)]
omap_hsmmc: Allow cover switch to cause rescan
Allow a cover switch to be used to cause a rescan of the
MMC slot.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Jarkko Lavinen [Fri, 21 Nov 2008 14:49:54 +0000 (16:49 +0200)]
omap_hsmmc: Add 8-bit bus width mode support
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Juha Yrjola [Fri, 14 Nov 2008 13:22:00 +0000 (15:22 +0200)]
omap_hsmmc: Implement scatter-gather emulation
Instead of using the bounce buffer, using scatter-gather emulation
(as in the OMAP1/2 MMC driver) removes the need of one extra memory
copy and improves performance.
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Mon, 12 Jan 2009 14:13:08 +0000 (16:13 +0200)]
omap_hsmmc: Fix response type for busy after response
Some MMC commands result in the card becoming busy after
the response is received. This needs to be specified
for the omap_hsmmc host controller, which is what this
patch does. However, the effect is that some commands
with no data will cause a Transfer Complete (TC) interrupt
in addition to the Command Complete (CC) interrupt.
In order to deal with that, the irq handler has needed
a few changes also.
The benefit of this change is that the omap_hsmmc host
controller driver now waits for the TC interrupt while
the card is busy, so the mmc_block driver needs to poll
the card status just once instead of repeatedly.
i.e. the net result is more sleep and less cpu.
The command sequence for open-ended multi-block write
with DMA is now:
Issue write command CMD25
Receive CC interrupt
Data is sent
Receive TC interrupt (DMA is done)
Issue stop command CMD12
Receive CC interrupt
Card is busy
Receive TC interrupt
Card is now ready for next transfer
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Jarkko Lavinen [Fri, 5 Dec 2008 10:31:46 +0000 (12:31 +0200)]
omap_hsmmc: Do dma cleanup also with data CRC errors
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman [Mon, 16 Mar 2009 18:52:26 +0000 (19:52 +0100)]
mmc: add maintainer for mvsdio driver
Nicolas Pitre accepted to look after the mvsdio driver.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Maen Suleiman [Sat, 14 Feb 2009 08:07:26 +0000 (03:07 -0500)]
mmc: SDIO driver for Marvell SoCs
This supports MMC/SD/SDIO currently found on the Kirkwood
88F6281 and
88F6192 SoC controllers.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Alexander Beregalov [Sat, 14 Mar 2009 09:37:47 +0000 (12:37 +0300)]
MMC: tmio_mmc.h: fix build problem
drivers/mmc/host/tmio_mmc.h: In function 'tmio_mmc_kmap_atomic':
drivers/mmc/host/tmio_mmc.h:147: error: implicit declaration of function 'kmap_atomic'
drivers/mmc/host/tmio_mmc.h:147: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function)
drivers/mmc/host/tmio_mmc.h: In function 'tmio_mmc_kunmap_atomic':
drivers/mmc/host/tmio_mmc.h:153: error: implicit declaration of function 'kunmap_atomic'
drivers/mmc/host/tmio_mmc.h:153: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function)
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Magnus Damm [Wed, 11 Mar 2009 12:59:03 +0000 (21:59 +0900)]
tmio_mmc: Fix use after free in remove()
Update the tmio_mmc code to call mmc_free_host() when
done using the private data. Without this fix the driver
frees memory and then keeps on using it as private data.
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Magnus Damm [Wed, 11 Mar 2009 12:58:54 +0000 (21:58 +0900)]
tmio_mmc: Fix one off, use resource_size() in probe()
Update the tmio_mmc code to use resource_size(). With this
patch applied the correct resource size is passed to ioremap().
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Wolfgang Muees [Wed, 11 Mar 2009 13:28:39 +0000 (14:28 +0100)]
mmc_spi: allow higher timeouts for SPI mode
Some SD cards have very high timeouts in SPI mode.
So adjust the timeouts from theory to practice.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Wolfgang Muees [Wed, 11 Mar 2009 13:17:43 +0000 (14:17 +0100)]
mmc_spi: wait more bytes for card response
Some cards are slower than the standard allows and need more
time to respond to a command. Max. observed number of bytes
was 12.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Wolfgang Muees [Wed, 11 Mar 2009 13:13:15 +0000 (14:13 +0100)]
mmc_spi: allow setting of spi mode 3
Allow the platform data structures to specify spi mode 3
(if there is a pullup on the clock line or the spi hardware
is not able to serve spi mode 0).
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman [Sat, 14 Mar 2009 20:17:32 +0000 (21:17 +0100)]
sdhci: change list address
Domain change of the sdhci development list.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Balaji Rao [Wed, 25 Feb 2009 09:58:09 +0000 (15:28 +0530)]
mmc: During unsafe resume, select the right volatge for the card
During mmc unsafe resume, choose the right voltage for the card after
powerup.
Although this has not seen to cause trouble, it's the wrong behaviour.
Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman [Thu, 5 Mar 2009 18:40:27 +0000 (19:40 +0100)]
sdio: check that addresses are within the address space
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman [Thu, 5 Mar 2009 18:38:38 +0000 (19:38 +0100)]
sdio: handle null tuples
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Pierre Ossman [Thu, 5 Mar 2009 18:37:28 +0000 (19:37 +0100)]
sdio: handle cis end marker in link field
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Kim Kyuwon [Fri, 20 Feb 2009 12:10:08 +0000 (13:10 +0100)]
omap_hsmmc: Initialize hsmmc controller registers when resuming
Most registers lose its state when the processor wakes up from sleep state.
Thus registers should be initialized, when the processor wakes up. However the
current hsmmc 'resume' function doesn't consider this issue and finally makes
deadlock. So this patch fixes this problem.
Signed-off-by: Kim Kyuwon <chammoru@gmail.com>
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Tue, 24 Feb 2009 12:48:16 +0000 (14:48 +0200)]
omap_hsmmc: do not re-power when powering off MMC
Remove code that turns MMC1 power back on after it
has been powered off (when the voltage is 1.8V).
The offending code is not necessary because the
host controller bus voltage is initialized to
3V when probing or resuming. Note that MMC powers up
with the highest voltage available (see mmc_power_up())
which will be 3V also.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Adrian Hunter [Wed, 11 Feb 2009 12:52:20 +0000 (14:52 +0200)]
mmc: Add Extended CSD register to debugfs
Extended CSD is a MMC card register. As increasingly interesting
fields are being added to Extended CSD, it is helpful to see its
value. Note that SD cards do not have an Extended CSD
register, so it is MMC only.
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Andy Whitcroft [Mon, 23 Feb 2009 12:38:41 +0000 (12:38 +0000)]
mmc: add MODALIAS linkage for MMC/SD devices
Currently we are using an explicit udev rule to trigger loading of the
mmc-block module when an MMC or SD card is detected:
SUBSYSTEM=="mmc", RUN+="/sbin/modprobe -Qba mmc-block"
It makes much more sense for the mmc bus driver and the mmc-block module to
share MODALIAS information so that they are linked automatically.
There is no real information of use in the MMC system at the current time.
All devices inserted require us to load the mmc-block device. Until such
time as useful parameters exist simply reflect the module linkage via
the module alias below:
mmc:block
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Jorg Schummer [Thu, 19 Feb 2009 11:17:03 +0000 (13:17 +0200)]
mmc: delayed_work was never cancelled
The delayed work item mmc_host.detect is now cancelled before flushing
the work queue. This takes care of cases when delayed_work was scheduled
for mmc_host.detect, but not yet placed in the work queue.
Signed-off-by: Jorg Schummer <ext-jorg.2.schummer@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Kay Sievers [Mon, 2 Feb 2009 20:08:30 +0000 (21:08 +0100)]
mmc: struct device - replace bus_id with dev_name(), dev_set_name()
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Linus Torvalds [Mon, 23 Mar 2009 23:12:14 +0000 (16:12 -0700)]
Linux 2.6.29
Kyle McMartin [Mon, 23 Mar 2009 19:25:49 +0000 (15:25 -0400)]
Build with -fno-dwarf2-cfi-asm
With a sufficiently new compiler and binutils, code which wasn't
previously generating .eh_frame sections has begun to. Certain
architectures (powerpc, in this case) may generate unexpected relocation
formats in response to this, preventing modules from loading.
While the new relocation types should probably be handled, revert to the
previous behaviour with regards to generation of .eh_frame sections.
(This was reported against Fedora, which appears to be the only distro
doing any building against gcc-4.4 at present: RH bz#486545.)
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Alexandre Oliva <aoliva@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jody McIntyre [Mon, 23 Mar 2009 17:13:34 +0000 (13:13 -0400)]
trivial: fix orphan dates in ext2 documentation
Revert the change to the orphan dates of Windows 95, DOS, compression.
Add a new orphan date for OS/2.
Signed-off-by: Jody McIntyre <scjody@sun.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 23 Mar 2009 16:25:58 +0000 (09:25 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits)
ucc_geth: Fix oops when using fixed-link support
dm9000: locking bugfix
net: update dnet.c for bus_id removal
dnet: DNET should depend on HAS_IOMEM
dca: add missing copyright/license headers
nl80211: Check that function pointer != NULL before using it
sungem: missing net_device_ops
be2net: fix to restore vlan ids into BE2 during a IF DOWN->UP cycle
be2net: replenish when posting to rx-queue is starved in out of mem conditions
bas_gigaset: correctly allocate USB interrupt transfer buffer
smsc911x: reset last known duplex and carrier on open
sh_eth: Fix mistake of the address of SH7763
sh_eth: Change handling of IRQ
netns: oops in ip[6]_frag_reasm incrementing stats
net: kfree(napi->skb) => kfree_skb
net: fix sctp breakage
ipv6: fix display of local and remote sit endpoints
net: Document /proc/sys/net/core/netdev_budget
tulip: fix crash on iface up with shirq debug
virtio_net: Make virtio_net support carrier detection
...
Linus Torvalds [Mon, 23 Mar 2009 16:25:24 +0000 (09:25 -0700)]
Merge git://git./linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Fix crash with /proc/iomem
sparc64: Reschedule KGDB capture to a software interrupt.
sbus: Auto-load openprom module when device opened.
Miklos Szeredi [Mon, 23 Mar 2009 15:07:24 +0000 (16:07 +0100)]
fix ptrace slowness
This patch fixes bug #12208:
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12208
Subject : uml is very slow on 2.6.28 host
This turned out to be not a scheduler regression, but an already
existing problem in ptrace being triggered by subtle scheduler
changes.
The problem is this:
- task A is ptracing task B
- task B stops on a trace event
- task A is woken up and preempts task B
- task A calls ptrace on task B, which does ptrace_check_attach()
- this calls wait_task_inactive(), which sees that task B is still on the runq
- task A goes to sleep for a jiffy
- ...
Since UML does lots of the above sequences, those jiffies quickly add
up to make it slow as hell.
This patch solves this by not rescheduling in read_unlock() after
ptrace_stop() has woken up the tracer.
Thanks to Oleg Nesterov and Ingo Molnar for the feedback.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 23 Mar 2009 15:03:09 +0000 (08:03 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/galak/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc:
powerpc/mm: Fix Respect _PAGE_COHERENT on classic ppc32 SW TLB load machines
Kumar Gala [Sat, 14 Mar 2009 14:23:03 +0000 (09:23 -0500)]
powerpc/mm: Fix Respect _PAGE_COHERENT on classic ppc32 SW TLB load machines
Grant picked up the wrong version of "Respect _PAGE_COHERENT on classic
ppc32 SW" (commit
a4bd6a93c3f14691c8a29e53eb04dc734b27f0db)
It was missing the code to actually deal with the fixup of
_PAGE_COHERENT based on the CPU feature.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Anton Vorontsov [Mon, 23 Mar 2009 04:30:52 +0000 (21:30 -0700)]
ucc_geth: Fix oops when using fixed-link support
commit
b1c4a9dddf09fe99b8f88252718ac5b357363dc4 ("ucc_geth: Change
uec phy id to the same format as gianfar's") introduced a regression
in the ucc_geth driver that causes this oops when fixed-link is used:
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc0151270
Oops: Kernel access of bad area, sig: 11 [#1]
TMCUTU
NIP:
c0151270 LR:
c0151270 CTR:
c0017760
REGS:
cf81fa60 TRAP: 0300 Not tainted (2.6.29-rc8)
MSR:
00009032 <EE,ME,IR,DR> CR:
24024042 XER:
20000000
DAR:
00000000, DSISR:
20000000
TASK =
cf81cba0[1] 'swapper' THREAD:
cf81e000
GPR00:
c0151270 cf81fb10 cf81cba0 00000000 c0272e20 c025f354 00001e80
cf86b08c
GPR08:
d1068200 cffffb74 06000000 d106c200 42024042 10085148 0fffd000
0ffc81a0
GPR16:
00000001 00000001 00000000 007ffeb0 00000000 0000c000 cf83f36c
cf83f000
GPR24:
00000030 cf83f360 cf81fb20 00000000 d106c200 20000000 00001e80
cf83f360
NIP [
c0151270] ucc_geth_open+0x330/0x1efc
LR [
c0151270] ucc_geth_open+0x330/0x1efc
Call Trace:
[
cf81fb10] [
c0151270] ucc_geth_open+0x330/0x1efc (unreliable)
[
cf81fba0] [
c0187638] dev_open+0xbc/0x12c
[
cf81fbc0] [
c0187e38] dev_change_flags+0x8c/0x1b0
This patch fixes the issue by removing offending (and somewhat
duplicate) code from init_phy() routine, and changes _probe()
function to use uec_mdio_bus_name().
Also, since we fully construct phy_bus_id in the _probe() routine,
we no longer need ->phy_address and ->mdio_bus fields in
ucc_geth_info structure.
I wish the patch would be a bit shorter, but it seems like the only
way to fix the issue in a sane way. Luckily, the patch has been
tested with real PHYs and fixed-link, so no further regressions
expected.
Reported-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Tested-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Brownell [Mon, 23 Mar 2009 04:28:39 +0000 (21:28 -0700)]
dm9000: locking bugfix
This fixes a locking bug in the dm9000 driver. It calls
request_irq() without setting IRQF_DISABLED ... which is
correct for handlers that support IRQ sharing, since that
behavior is not guaranteed for shared IRQs. However, its
IRQ handler then wrongly assumes that IRQs are blocked.
So the fix just uses the right spinlock primitives in the
IRQ handler.
NOTE: this is a classic example of the type of bug which
lockdep currently masks by forcibly setting IRQF_DISABLED
on IRQ handlers that did not request that flag.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stephen Rothwell [Mon, 23 Mar 2009 04:22:48 +0000 (21:22 -0700)]
net: update dnet.c for bus_id removal
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sun, 22 Mar 2009 18:41:02 +0000 (11:41 -0700)]
Merge git://git./linux/kernel/git/sam/kbuild-fixes
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
kconfig: improve seed in randconfig
kconfig: fix randconfig for choice blocks
Linus Torvalds [Sun, 22 Mar 2009 18:38:57 +0000 (11:38 -0700)]
Merge branch 'fix-includes' of git://git./linux/kernel/git/gerg/m68knommu
* 'fix-includes' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: merge the non-MMU and MMU versions of siginfo.h
m68k: use the MMU version of unistd.h for all m68k platforms
m68k: merge the non-MMU and MMU versions of signal.h
m68k: merge the non-MMU and MMU versions of ptrace.h
m68k: use MMU version of setup.h for both MMU and non-MMU
m68k: merge the non-MMU and MMU versions of sigcontext.h
m68k: merge the non-MMU and MMU versions of swab.h
m68k: merge the non-MMU and MMU versions of param.h
Gertjan van Wingerde [Sat, 21 Mar 2009 22:18:57 +0000 (23:18 +0100)]
Update my email address
Update all previous incarnations of my email address to the correct one.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tyler Hicks [Fri, 20 Mar 2009 07:23:57 +0000 (02:23 -0500)]
eCryptfs: NULL crypt_stat dereference during lookup
If ecryptfs_encrypted_view or ecryptfs_xattr_metadata were being
specified as mount options, a NULL pointer dereference of crypt_stat
was possible during lookup.
This patch moves the crypt_stat assignment into
ecryptfs_lookup_and_interpose_lower(), ensuring that crypt_stat
will not be NULL before we attempt to dereference it.
Thanks to Dan Carpenter and his static analysis tool, smatch, for
finding this bug.
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Acked-by: Dustin Kirkland <kirkland@canonical.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tyler Hicks [Fri, 20 Mar 2009 06:25:09 +0000 (01:25 -0500)]
eCryptfs: Allocate a variable number of pages for file headers
When allocating the memory used to store the eCryptfs header contents, a
single, zeroed page was being allocated with get_zeroed_page().
However, the size of an eCryptfs header is either PAGE_CACHE_SIZE or
ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE (8192), whichever is larger, and is
stored in the file's private_data->crypt_stat->num_header_bytes_at_front
field.
ecryptfs_write_metadata_to_contents() was using
num_header_bytes_at_front to decide how many bytes should be written to
the lower filesystem for the file header. Unfortunately, at least 8K
was being written from the page, despite the chance of the single,
zeroed page being smaller than 8K. This resulted in random areas of
kernel memory being written between the 0x1000 and 0x1FFF bytes offsets
in the eCryptfs file headers if PAGE_SIZE was 4K.
This patch allocates a variable number of pages, calculated with
num_header_bytes_at_front, and passes the number of allocated pages
along to ecryptfs_write_metadata_to_contents().
Thanks to Florian Streibelt for reporting the data leak and working with
me to find the problem. 2.6.28 is the only kernel release with this
vulnerability. Corresponds to CVE-2009-0787
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Acked-by: Dustin Kirkland <kirkland@canonical.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Eugene Teo <eugeneteo@kernel.sg>
Cc: Greg KH <greg@kroah.com>
Cc: dann frazier <dannf@dannf.org>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Florian Streibelt <florian@f-streibelt.de>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Benjamin Herrenschmidt [Thu, 19 Mar 2009 22:22:30 +0000 (09:22 +1100)]
radeonfb: Whack the PCI PM register until it sticks
This fixes a regression introduced when we switched to using the core
pci_set_power_state(). The chip seems to need the state to be written
over and over again until it sticks, so we do that.
Note that the code is a bit blunt, without timeout, etc... but that's
pretty much because I put back in there the code exactly as it used to
be before the regression. I still add a call to pci_set_power_state()
at the end so that ACPI gets called appropriately on x86.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Raymond Wooninck <tittiatcoke@gmail.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ilya Yanok [Sat, 21 Mar 2009 23:58:47 +0000 (16:58 -0700)]
dnet: DNET should depend on HAS_IOMEM
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Maciej Sosnowski [Sat, 21 Mar 2009 20:31:23 +0000 (13:31 -0700)]
dca: add missing copyright/license headers
In two dca files copyright and license headers are missing.
This patch adds them there.
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 20 Mar 2009 21:53:36 +0000 (14:53 -0700)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6
Jouni Malinen [Fri, 20 Mar 2009 15:57:36 +0000 (17:57 +0200)]
nl80211: Check that function pointer != NULL before using it
NL80211_CMD_GET_MESH_PARAMS and NL80211_CMD_SET_MESH_PARAMS handlers
did not verify whether a function pointer is NULL (not supported by
the driver) before trying to call the function. The former nl80211
command is available for unprivileged users, too, so this can
potentially allow normal users to kill networking (or worse..) if
mac80211 is built without CONFIG_MAC80211_MESH=y.
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Stephen Hemminger [Fri, 20 Mar 2009 06:58:01 +0000 (23:58 -0700)]
sungem: missing net_device_ops
Sungem driver only got partially converted to net_device_ops.
Since this could cause bugs, please push this to 2.6.29
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sathya Perla [Fri, 20 Mar 2009 06:56:46 +0000 (23:56 -0700)]
be2net: fix to restore vlan ids into BE2 during a IF DOWN->UP cycle
This is a patch to reconfigure vlan-ids during an i/f down/up cycle
Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sathya Perla [Fri, 20 Mar 2009 06:56:20 +0000 (23:56 -0700)]
be2net: replenish when posting to rx-queue is starved in out of mem conditions
This is a patch to replenish the rx-queue when it is in a starved
state (due to out-of-mem conditions)
Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jeff Moyer [Thu, 19 Mar 2009 00:04:21 +0000 (17:04 -0700)]
aio: lookup_ioctx can return the wrong value when looking up a bogus context
The libaio test harness turned up a problem whereby lookup_ioctx on a
bogus io context was returning the 1 valid io context from the list
(harness/cases/3.p).
Because of that, an extra put_iocontext was done, and when the process
exited, it hit a BUG_ON in the put_iocontext macro called from exit_aio
(since we expect a users count of 1 and instead get 0).
The problem was introduced by "aio: make the lookup_ioctx() lockless"
(commit
abf137dd7712132ee56d5b3143c2ff61a72a5faa).
Thanks to Zach for pointing out that hlist_for_each_entry_rcu will not
return with a NULL tpos at the end of the loop, even if the entry was
not found.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Zach Brown <zach.brown@oracle.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Davide Libenzi [Thu, 19 Mar 2009 00:04:19 +0000 (17:04 -0700)]
eventfd: remove fput() call from possible IRQ context
Remove a source of fput() call from inside IRQ context. Myself, like Eric,
wasn't able to reproduce an fput() call from IRQ context, but Jeff said he was
able to, with the attached test program. Independently from this, the bug is
conceptually there, so we might be better off fixing it. This patch adds an
optimization similar to the one we already do on ->ki_filp, on ->ki_eventfd.
Playing with ->f_count directly is not pretty in general, but the alternative
here would be to add a brand new delayed fput() infrastructure, that I'm not
sure is worth it.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 19 Mar 2009 22:53:19 +0000 (15:53 -0700)]
Move cc-option to below arch-specific setup
Sam Ravnborg says:
"We have several architectures that plays strange games with $(CC) and
$(CROSS_COMPILE).
So we need to postpone any use of $(call cc-option..) until we have
included the arch specific Makefile so we try with the correct $(CC)
version."
Requested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 19 Mar 2009 21:56:35 +0000 (14:56 -0700)]
Merge branch 'for-linus' of git://git390.marist.edu/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] make page table upgrade work again
[S390] make page table walking more robust
[S390] Dont check for pfn_valid() in uaccess_pt.c
[S390] ftrace/mcount: fix kernel stack backchain
[S390] topology: define SD_MC_INIT to fix performance regression
[S390] __div64_31 broken for CONFIG_MARCH_G5
Linus Torvalds [Thu, 19 Mar 2009 21:50:15 +0000 (14:50 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: fix waitqueue usage in hiddev
HID: fix incorrect free in hiddev
Linus Torvalds [Thu, 19 Mar 2009 21:49:55 +0000 (14:49 -0700)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: Clear space_info full when adding new devices
Btrfs: Fix locking around adding new space_info
Linus Torvalds [Thu, 19 Mar 2009 18:32:05 +0000 (11:32 -0700)]
Fix race in create_empty_buffers() vs __set_page_dirty_buffers()
Nick Piggin noticed this (very unlikely) race between setting a page
dirty and creating the buffers for it - we need to hold the mapping
private_lock until we've set the page dirty bit in order to make sure
that create_empty_buffers() might not build up a set of buffers without
the dirty bits set when the page is dirty.
I doubt anybody has ever hit this race (and it didn't solve the issue
Nick was looking at), but as Nick says: "Still, it does appear to solve
a real race, which we should close."
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 19 Mar 2009 18:10:17 +0000 (11:10 -0700)]
Add '-fwrapv' to gcc CFLAGS
This makes sure that gcc doesn't try to optimize away wrapping
arithmetic, which the kernel occasionally uses for overflow testing, ie
things like
if (ptr + offset < ptr)
which technically is undefined for non-unsigned types. See
http://bugzilla.kernel.org/show_bug.cgi?id=12597
for details.
Not all versions of gcc support it, so we need to make it conditional
(it looks like it was introduced in gcc-3.4).
Reminded-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David S. Miller [Thu, 19 Mar 2009 06:53:57 +0000 (23:53 -0700)]
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Mikulas Patocka [Thu, 19 Mar 2009 06:53:16 +0000 (23:53 -0700)]
sparc64: Fix crash with /proc/iomem
When you compile kernel on Sparc64 with heap memory checking and type
"cat /proc/iomem", you get a crash, because pointers in struct
resource are uninitialized.
Most code fills struct resource with zeros, so I assume that it is
responsibility of the caller of request_resource to initialized it,
not the responsibility of request_resource functuion.
After 2.6.29 is out, there could be a check for uninitialized fields
added to request_resource to avoid crashes like this.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 19 Mar 2009 06:51:57 +0000 (23:51 -0700)]
sparc64: Reschedule KGDB capture to a software interrupt.
Otherwise it might interrupt switch_to() midstream and use
half-cooked register window state.
Reported-by: Chris Torek <chris.torek@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tilman Schmidt [Thu, 19 Mar 2009 06:44:23 +0000 (23:44 -0700)]
bas_gigaset: correctly allocate USB interrupt transfer buffer
Every USB transfer buffer has to be allocated individually by kmalloc.
Impact: bugfix, no functional change
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Tested-by: Kolja Waschk <kawk@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steve Glendinning [Thu, 19 Mar 2009 06:37:18 +0000 (23:37 -0700)]
smsc911x: reset last known duplex and carrier on open
smsc911x_phy_adjust_link is called periodically by the phy layer (as
it's run in polling mode), and it only updates the hardware when it sees
a change in duplex or carrier. This patch clears the last known values
every time the interface is brought up, instead of only when the module
is loaded.
Without this patch the adjust_link function never updates the hardware
after an ifconfig down; ifconfig up. On a full duplex link this causes
the tx error counter to increment, even though packets are correctly
transmitted, as the default MAC_CR register setting is for half duplex.
The tx errors are "no carrier" errors, which should be ignored in
full-duplex mode. When MAC_CR is set to "full duplex" mode they are
correctly ignored by the hardware.
Note that even with this patch the tx error counter can increment if
packets are transmitted between "ifconfig up" and the first phy poll
interval. An improved solution would use the phy interrupt with phylib,
but I haven't managed to make this work 100% robustly yet.
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nobuhiro Iwamatsu [Mon, 16 Mar 2009 19:52:23 +0000 (19:52 +0000)]
sh_eth: Fix mistake of the address of SH7763
Address of SH_TSU_ADDR and ARSTR of SH7763 was wrong.
This revise it.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nobuhiro Iwamatsu [Mon, 16 Mar 2009 19:50:57 +0000 (19:50 +0000)]
sh_eth: Change handling of IRQ
Handling of IRQ of the SH7763/SH7764 CPU which sh_eth supported was
changed.
This revises it for this change.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jorge Boncompte [DTI2] [Thu, 19 Mar 2009 06:26:11 +0000 (23:26 -0700)]
netns: oops in ip[6]_frag_reasm incrementing stats
dev can be NULL in ip[6]_frag_reasm for skb's coming from RAW sockets.
Quagga's OSPFD sends fragmented packets on a RAW socket, when netfilter
conntrack reassembles them on the OUTPUT path you hit this code path.
You can test it with something like "hping2 -0 -d 2000 -f AA.BB.CC.DD"
With help from Jarek Poplawski.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Roel Kluin [Thu, 19 Mar 2009 06:12:13 +0000 (23:12 -0700)]
net: kfree(napi->skb) => kfree_skb
struct sk_buff pointers should be freed with kfree_skb.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Al Viro [Thu, 19 Mar 2009 02:12:42 +0000 (19:12 -0700)]
net: fix sctp breakage
broken by commit
5e739d1752aca4e8f3e794d431503bfca3162df4; AFAICS should
be -stable fodder as well...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Aced-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bjørn Mork [Thu, 19 Mar 2009 01:56:54 +0000 (18:56 -0700)]
ipv6: fix display of local and remote sit endpoints
This fixes the regressions cause by
commit
1326c3d5a4b792a2b15877feb7fb691f8945d203
(
v2.6.28-rc6-461-g23a12b1) broke the display of local and remote
addresses of an SIT tunnel in iproute2.
nt->parms is used by ipip6_tunnel_init() and therefore need to be
initialized first.
Tracked as http://bugzilla.kernel.org/show_bug.cgi?id=12868
Reported-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stanislaw Gruszka [Thu, 19 Mar 2009 01:51:06 +0000 (18:51 -0700)]
net: Document /proc/sys/net/core/netdev_budget
The NAPI poll parameter netdev_budget is not documented in
kernel-docs. Since it may have a substantial effect on at least some
network loads, it should be.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kyle McMartin [Thu, 19 Mar 2009 01:49:01 +0000 (18:49 -0700)]
tulip: fix crash on iface up with shirq debug
Tulip is currently doing request_irq before it has done its
initialization. This is usually not a problem because it hasn't
enable interrupts yet, but with DEBUG_SHIRQ on, we call the irq handler
when registering the interrupt as a sanity check.
This can result in a NULL ptr dereference, so call tulip_init_ring
before request_irq, and add a free_ring function to do the freeing
now shared with tulip_close.
Tested with a shell loop running ifup, ifdown in a loop a few hundred
times with DEBUG_SHIRQ on.
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pantelis Koukousoulas [Thu, 19 Mar 2009 01:40:02 +0000 (18:40 -0700)]
virtio_net: Make virtio_net support carrier detection
Impact: Make NetworkManager work with virtio_net
For now the semantics are simple: There is always carrier.
This allows a seamless experience with e.g., qemu/kvm
where NetworkManager just configures and sets up
everything automagically.
If/when a generally agreed-upon way to control
carrier on/off in the emulator/hypervisor level
emerges, it will be trivial to extend the driver
to support that too, but for now even this 2-liner
makes user experience that much better.
Signed-off-by: Pantelis Koukousoulas <pktoss@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jay Vosburgh [Thu, 19 Mar 2009 01:38:25 +0000 (18:38 -0700)]
bonding: Fix updating of speed/duplex changes
This patch corrects an omission from the following commit:
commit
f0c76d61779b153dbfb955db3f144c62d02173c2
Author: Jay Vosburgh <fubar@us.ibm.com>
Date: Wed Jul 2 18:21:58 2008 -0700
bonding: refactor mii monitor
The un-refactored code checked the link speed and duplex of
every slave on every pass; the refactored code did not do so.
The 802.3ad and balance-alb/tlb modes utilize the speed and
duplex information, and require it to be kept up to date. This patch
adds a notifier check to perform the appropriate updating when the slave
device speed changes.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Michael Chan [Thu, 19 Mar 2009 01:11:51 +0000 (18:11 -0700)]
bnx2: Fix problem of using wrong IRQ handler.
The MSI-X handler was chosen before the call to pci_enable_msix().
If MSI-X was not available, the wrong MSI-X handler would be used in
INTA mode. This would cause a screaming interrupt problem because
INTA would not be cleared by the MSI-X handler.
Fixed by assigning MSI-X handler after pci_enable_msix() returns
successfully. Also update version to 1.9.3.
Thomas Chenault <thomas_chenault@dell.com> helped us find this problem.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 18 Mar 2009 16:34:17 +0000 (09:34 -0700)]
Merge git://git./linux/kernel/git/gregkh/staging-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
Staging: benet: remove driver now that it is merged in drivers/net/
Linus Torvalds [Wed, 18 Mar 2009 16:27:20 +0000 (09:27 -0700)]
Merge branch 'for-2.6.29' of git://linux-nfs.org/~bfields/linux
* 'for-2.6.29' of git://linux-nfs.org/~bfields/linux:
nfsd: nfsd should drop CAP_MKNOD for non-root
NFSD: provide encode routine for OP_OPENATTR
Greg Kroah-Hartman [Wed, 18 Mar 2009 16:22:17 +0000 (09:22 -0700)]
Staging: benet: remove driver now that it is merged in drivers/net/
The benet driver is now in the proper place in drivers/net/benet, so we
can remove the staging version.
Acked-by: Sathya Perla <sathyap@serverengines.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Wed, 18 Mar 2009 16:05:40 +0000 (09:05 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/ps3: ps3_defconfig updates
powerpc/mm: Respect _PAGE_COHERENT on classic ppc32 SW
powerpc/5200: Enable CPU_FTR_NEED_COHERENT for MPC52xx
ps3/block: Replace mtd/ps3vram by block/ps3vram
Linus Torvalds [Wed, 18 Mar 2009 16:04:25 +0000 (09:04 -0700)]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
module: fix refptr allocation and release order
Linus Torvalds [Wed, 18 Mar 2009 16:03:18 +0000 (09:03 -0700)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
USB: storage: Unusual USB device Prolific 2507 variation added
USB: Add device id for Option GTM380 to option driver
USB: Add Vendor/Product ID for new CDMA U727 to option driver
USB: Updated unusual-devs entry for USB mass storage on Nokia 6233
USB: Option: let cdc-acm handle Sony Ericsson F3507g / Dell 5530
USB: EHCI: expedite unlinks when the root hub is suspended
USB: EHCI: Fix isochronous URB leak
USB: option.c: add ZTE 622 modem device
USB: wusbcore/wa-xfer, fix lock imbalance
USB: misc/vstusb, fix lock imbalance
USB: misc/adutux, fix lock imbalance
USB: image/mdc800, fix lock imbalance
USB: atm/cxacru, fix lock imbalance
USB: unusual_devs: Add support for GI 0431 SD-Card interface
USB: serial: new cp2101 device id
USB: serial: ftdi: enable UART detection on gnICE JTAG adaptors blacklist interface0
USB: serial: add FTDI USB/Serial converter devices
USB: usbfs: keep async URBs until the device file is closed
USB: usbtmc: add protocol 1 support
USB: usbtmc: fix stupid bug in open()
Linus Torvalds [Wed, 18 Mar 2009 14:39:11 +0000 (07:39 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: Fix vunmap and free order in snd_free_sgbuf_pages()
ALSA: mixart, fix lock imbalance
ALSA: pcm_oss, fix locking typo
ALSA: oss-mixer - Fixes recording gain control
ALSA: hda - Workaround for buggy DMA position on ATI controllers
ALSA: hda - Fix DMA mask for ATI controllers
ALSA: opl3sa2 - Fix NULL dereference when suspending snd_opl3sa2
Martin Schwidefsky [Wed, 18 Mar 2009 12:27:37 +0000 (13:27 +0100)]
[S390] make page table upgrade work again
After TASK_SIZE now gives the current size of the address space the
upgrade of a 64 bit process from 3 to 4 levels of page table needs
to use the arch_mmap_check hook to catch large mmap lengths. The
get_unmapped_area* functions need to check for -ENOMEM from the
arch_get_unmapped_area*, upgrade the page table and retry.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Wed, 18 Mar 2009 12:27:36 +0000 (13:27 +0100)]
[S390] make page table walking more robust
Make page table walking on s390 more robust. The current code requires
that the pgd/pud/pmd/pte loop is only done for address ranges that are
below the end address of the last vma of the address space. But this
is not always true, e.g. the generic page table walker does not guarantee
this. Change TASK_SIZE/TASK_SIZE_OF to reflect the current size of the
address space. This makes the generic page table walker happy but it
breaks the upgrade of a 3 level page table to a 4 level page table.
To make the upgrade work again another fix is required.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Gerald Schaefer [Wed, 18 Mar 2009 12:27:35 +0000 (13:27 +0100)]
[S390] Dont check for pfn_valid() in uaccess_pt.c
pfn_valid() actually checks for a valid struct page and not for a
valid pfn. Using xip mappings w/o struct pages, this will result in
-EFAULT returned by the (page table walk) user copy functions,
even though there is valid memory. Those user copy functions don't
need a struct page, so this patch just removes the pfn_valid() check.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Wed, 18 Mar 2009 12:27:34 +0000 (13:27 +0100)]
[S390] ftrace/mcount: fix kernel stack backchain
With packed stack the backchain is at a different location.
Just use __SF_BACKCHAIN as an offset to store the backchain.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Wed, 18 Mar 2009 12:27:33 +0000 (13:27 +0100)]
[S390] topology: define SD_MC_INIT to fix performance regression
The default values for SD_MC_INIT cause an additional cpu usage of up
to 40% on some network benchmarks compared to the plain SD_CPU_INIT
values. So just define SD_MC_INIT to SD_CPU_INIT.
More tuning needs to be done.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>