We need a barrir before calling waitqueue_active otherwise we will miss
wakeups. So in places that do atomic_dec(); then atomic_read() use
atomic_dec_return() which imply a memory barrier (see memory-barriers.txt)
and then add an explicit memory barrier everywhere else that need them.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Commit a168650c introduced a waiting mechanism to prevent busy waiting in
btrfs_run_delayed_refs. This can deadlock with btrfs_run_ordered_operations,
where a tree_mod_seq is held while waiting for the io to complete, while
the end_io calls btrfs_run_delayed_refs.
This whole mechanism is unnecessary. If not enough runnable refs are
available to satisfy count, just return as count is more like a guideline
than a strict requirement.
In case we have to run all refs, commit transaction makes sure that no
other threads are working in the transaction anymore, so we just assert
here that no refs are blocked.
Signed-off-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
We've been allocating a big array for csums instead of storing them in the
io_tree like we do for buffered reads because previously we were locking the
entire range, so we didn't have an extent state for each sector of the
range. But now that we do the range locking as we map the buffers we can
limit the mapping lenght to sectorsize and use the private part of the
io_tree for our csums. This allows us to avoid an extra memory allocation
for direct reads which could incur latency. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
When we close devices we add back empty devices for some reason that escapes
me. In the case of a missing dev we don't allocate an rcu_string for it's
name, so check to see if the device has a name and if it doesn't don't
bother strdup()'ing it. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
If you do the following
mkfs.btrfs /dev/sdb /dev/sdc
rmmod btrfs
dd if=/dev/zero of=/dev/sdb bs=1M count=1
mount -o degraded /dev/sdc /mnt/btrfs-test
the box will panic trying to deref the name for the missing dev since it is
the lower numbered devid. So fix show_devname to not use missing devices.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
In iterate_inodes_from_logical() the error result from
extent_from_logical() is patched by mistake. Typically ENOENT is
patched to EINVAL because (-ENOENT & BTRFS_EXTENT_FLAG_TREE_BLOCK)
evaluates to true.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
A deadlock in xfstests 113 was uncovered by commit
d187663ef2
This is because we would not return EIOCBQUEUED for short AIO reads, instead
we'd wait for the DIO to complete and then return the amount of data we
transferred, which would allow our stuff to unlock the remaning amount. But
with this change this no longer happens, so if we have a short AIO read (for
example if we try to read past EOF), we could leave the section from EOF to
the end of where we tried to read locked. Fixing this is tricky since there
is no clear way to know exactly how much data DIO truly submitted for IO, so
to make this less hard on ourselves and less combersome we need to lock the
extents as we try to map them, and then we unlock any areas we didn't
actually map. This makes us completely safe from deadlocks and reliance on
a particular behavior of the DIO code. This also lays the groundwork for
allowing us to use the normal csum storage method for reads which means we
can remove an allocation. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
"trans->transid" is cpu endian but we want to store the data as little
endian. "item->ctime.nsec" is only 32 bits, not 64.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Make use of the same atomic pool as DMA does, and skip a kernel page
mapping which can involve sleep'able operations at allocating a kernel
page table.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Support atomic allocation in __iommu_get_pages().
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
[moved __atomic_get_pages() under #ifdef CONFIG_ARM_DMA_USE_IOMMU
to avoid unused fuction warning for no-IOMMU case]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Check the given range("start", "size") is included in "atomic_pool" or not.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
struct page **pages is necessary to align with non atomic path in
__iommu_get_pages(). atomic_pool() has the intialized **pages instead
of just *page.
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
The default 256 KiB coherent pool may be too small for some of the Kirkwood
devices, so increase it to make sure that devices will be able to allocate
their buffers with GFP_ATOMIC flag.
Suggested-by: Josh Coombs <josh.coombs@gmail.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Print a loud warning when system runs out of memory from atomic DMA
coherent pool to let users notice the potential problem.
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Some platforms might require to increase atomic coherent pool to make
sure that their device will be able to allocate all their buffers from
atomic context. This function can be also used to decrease atomic
coherent pool size if coherent allocations are not used for the given
sub-platform.
Suggested-by: Josh Coombs <josh.coombs@gmail.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Contiguous Memory Allocator requires only paging and MMU enabled not
particular CPU architectures, so there is no need for strict dependency
on CPU type. This enables to use CMA on some older ARM v5 systems which
also might need large contiguous blocks for the multimedia processing hw
modules.
Reported-by: Prabhakar Lad <prabhakar.lad@ti.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Prabhakar Lad <prabhakar.lad@ti.com>
Contiguous Memory Allocator requires each of its regions to be aligned
in such a way that it is possible to change migration type for all
pageblocks holding it and then isolate page of largest possible order from
the buddy allocator (which is MAX_ORDER-1). This patch relaxes alignment
requirements by one order, because MAX_ORDER alignment is not really
needed.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Michal Nazarewicz <mina86@mina86.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
These codecs seem reporting EPSS but require longer delay for the
proper D3 transition. For example, D3_STOP_CLOCK_OK bit won't be set
correctly even after D3.
In this patch, codec->epss flag is overridden for avoid the
misbehavior.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
EPSS parameter should be static, so we can read it once and remember.
This also allows more easily to override the wrong EPSS capability
reported from a codec by changing the flag in the codec
initialization step.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Fix this compile error:
arch/s390/kernel/machine_kexec.c: In function ‘setup_regs’:
arch/s390/kernel/machine_kexec.c:63:3: error: implicit declaration
of function ‘smp_store_status’ [-Werror=implicit-function-declaration]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
For unimplemented ioctls the dasd driver should return -ENOTTY.
Reported-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
- move to sparse IRQ: some drivers were forgotten
- a DTS typo
- the delay for removal of old at91_mci driver
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Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes
Fixes for AT91 related to:
- move to sparse IRQ: some drivers were forgotten
- a DTS typo
- the delay for removal of old at91_mci driver
* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
ARM: at91/feature-removal-schedule: delay at91_mci removal
ARM: at91/dts: remove partial parameter in at91sam9g25ek.dts
ARM: at91/clock: fix PLLA overclock warning
ARM: at91: fix rtc-at91sam9 irq issue due to sparse irq support
ARM: at91: fix system timer irq issue due to sparse irq support
KVM_GET_MSR was missing support for PV EOI,
which is needed for migration.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This patch (as1603) adds a NOGET quirk for the Eaton Ellipse MAX UPS
device. (The USB IDs were already present in hid-ids.h, apparently
under a different name.)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Laurent Bigonville <l.bigonville@edpnet.be>
CC: <stable@vger.kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Delay sd/mmc driver at91_mci.c removal because of tight schedule to
move platform data to new driver atmel-mci.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
KVM_SET_SIGNAL_MASK passed a NULL argument leaves the on stack signal
sets uninitialized. It then passes them through to
kvm_vcpu_ioctl_set_sigmask.
We should be passing a NULL in this case not translated garbage.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
There are few important bug fixes for LogFS
9f0bbd8 logfs: query block device for number of pages to send with bio
This BUG was found when LogFS was used on KVM. The patch fixes
the problem by asking for underlaying block device the number
of pages to send with each BIO.
41b93bc logfs: maintain the ordering of meta-inode destruction
LogFS maintains file system meta-data in special inodes. These
inodes are releated to each other, therefore they must be
destroyed in a proper order.
ddb24bb logfs: create a pagecache page if it is not present
cd8bfa9 logfs: initialize the number of iovecs in bio
LogFS used to panic when it was created on an encrypted LVM
volume. The patch fixes the problem by properly initializing
the BIO.
d2dcd90 logfs: destroy the reserved inodes while unmounting
Diffstat:
fs/logfs/dev_bdev.c | 15 ++++++++-------
fs/logfs/inode.c | 18 +-----------------
fs/logfs/journal.c | 2 +-
fs/logfs/readwrite.c | 1 +
fs/logfs/segment.c | 2 +-
5 files changed, 12 insertions(+), 26 deletions(-)
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Merge tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream
Pull LogFS bugfixes from Prasad Joshi:
- "logfs: query block device for number of pages to send with bio"
This BUG was found when LogFS was used on KVM. The patch fixes
the problem by asking for underlaying block device the number
of pages to send with each BIO.
- "logfs: maintain the ordering of meta-inode destruction"
LogFS maintains file system meta-data in special inodes. These
inodes are releated to each other, therefore they must be
destroyed in a proper order.
- "logfs: initialize the number of iovecs in bio"
LogFS used to panic when it was created on an encrypted LVM
volume. The patch fixes the problem by properly initializing
the BIO.
Plus a couple more:
- logfs: create a pagecache page if it is not present
- logfs: destroy the reserved inodes while unmounting
* tag 'for-linus' of git://github.com/prasad-joshi/logfs_upstream:
logfs: query block device for number of pages to send with bio
logfs: maintain the ordering of meta-inode destruction
logfs: create a pagecache page if it is not present
logfs: initialize the number of iovecs in bio
logfs: destroy the reserved inodes while unmounting
Bug fixes for various ARM platforms. About half of these are
for OMAP and submitted before but did not make it into v3.6-rc2.
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Merge tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm-soc fixes from Arnd Bergmann:
"Bug fixes for various ARM platforms. About half of these are for OMAP
and submitted before but did not make it into v3.6-rc2."
* tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
ARM: ux500: don't select LEDS_GPIO for snowball
ARM: imx: build i.MX6 functions only when needed
ARM: imx: select CPU_FREQ_TABLE when needed
ARM: imx: fix ksz9021rn_phy_fixup
ARM: imx: build pm-imx5 code only when PM is enabled
ARM: omap: allow building omap44xx without SMP
ARM: dts: imx51-babbage: fix esdhc cd/wp properties
ARM: imx6: spin the cpu until hardware takes it down
ARM: ux500: Ensure probing of Audio devices when Device Tree is enabled
ARM: ux500: Fix merge error, no matching driver name for 'snd_soc_u8500'
ARM i.MX6q: Add virtual 1/3.5 dividers in the LDB clock path
ARM: Kirkwood: fix Makefile.boot
ARM: Kirkwood: Fix iconnect leds
ARM: Orion: Set eth packet size csum offload limit
ARM: mv78xx0: fix win_cfg_base prototype
ARM: OMAP: dmtimers: Fix locking issue in omap_dm_timer_request*()
ARM: mmp: fix potential NULL dereference
ARM: OMAP4: Register the OPP table only for 4430 device
cpufreq: OMAP: Handle missing frequency table on SMP systems
ARM: OMAP4: sleep: Save the complete used register stack frame
...
- Revert the kexec fix which caused on non-kexec shutdowns a race.
- Reuse existing P2M leafs - instead of requiring to allocate a large
area of bootup virtual address estate.
- Fix a one-off error when adding PFNs for balloon pages.
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Merge tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull three xen bug-fixes from Konrad Rzeszutek Wilk:
- Revert the kexec fix which caused on non-kexec shutdowns a race.
- Reuse existing P2M leafs - instead of requiring to allocate a large
area of bootup virtual address estate.
- Fix a one-off error when adding PFNs for balloon pages.
* tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen/setup: Fix one-off error when adding for-balloon PFNs to the P2M.
xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID.
Revert "xen PVonHVM: move shared_info to MMIO before kexec"
Pull powerpc fixes from Benjamin Herrenschmidt:
"I meant to sent that earlier but got swamped with other things, so
here are some powerpc fixes for 3.6. A few regression fixes and some
bug fixes that I deemed should still make it.
There's a FSL update from Kumar with a bunch of defconfig updates
along with a few embedded fixes.
I also reverted my g5_defconfig update that I merged earlier as it was
completely busted, not too sure what happened there, I'll do a new one
later."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
Revert "powerpc: Update g5_defconfig"
powerpc/perf: Use pmc_overflow() to detect rolled back events
powerpc: Fix VMX in interrupt check in POWER7 copy loops
powerpc: POWER7 copy_to_user/copy_from_user patch applied twice
powerpc: Fix personality handling in ppc64_personality()
powerpc/dma-iommu: Fix IOMMU window check
powerpc: Remove unnecessary ifdefs
powerpc/kgdb: Restore current_thread_info properly
powerpc/kgdb: Bail out of KGDB when we've been triggered
powerpc/kgdb: Do not set kgdb_single_step on ppc
powerpc/mpic_msgr: Add missing includes
powerpc: Fix null pointer deref in perf hardware breakpoints
powerpc: Fixup whitespace in xmon
powerpc: Fix xmon dl command for new printk implementation
powerpc/fsl: fix "Failed to mount /dev: No such device" errors
powerpc/fsl: update defconfigs
booke/wdt: some ioctls do not return values properly
powerpc/p4080ds: dts - add usb controller version info and port0
powerpc/85xx: mpc85xx_defconfig - add VIA PATA support for MPC85xxCDS
powerpc/fsl-pci: Only scan PCI bus if configured as a host
Pull kvm fixes from Marcelo Tosatti.
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86 emulator: use stack size attribute to mask rsp in stack ops
KVM: MMU: Fix mmu_shrink() so that it can free mmu pages as intended
ppc: e500_tlb memset clears nothing
KVM: PPC: Add cache flush on page map
KVM: PPC: Book3S HV: Fix incorrect branch in H_CEDE code
KVM: x86: update KVM_SAVE_MSRS_BEGIN to correct value
- fix uninitialised variable in xfs_rtbuf_get()
- unlock the AGI buffer when looping in xfs_dialloc
- check for possible overflow in xfs_ioc_trim
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Merge tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfs
Pull xfs bugfixes from Ben Myers:
- fix uninitialised variable in xfs_rtbuf_get()
- unlock the AGI buffer when looping in xfs_dialloc
- check for possible overflow in xfs_ioc_trim
* tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfs:
xfs: check for possible overflow in xfs_ioc_trim
xfs: unlock the AGI buffer when looping in xfs_dialloc
xfs: fix uninitialised variable in xfs_rtbuf_get()
Pull MIPS fixes from Ralf Baechle:
"Random fixes across the MIPS tree. The two hotspots are several bugs
in the module loader and the ath79 SOC support; also noteworthy is the
restructuring of the code to synchronize CPU timers across CPUs on
startup; the old code recently ceased to work due to unrelated
changes.
All except one of these patches have sat for a significant time in
linux-next for testing."
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: pci-ar724x: avoid data bus error due to a missing PCIe module
MIPS: Malta: Delete duplicate PCI fixup.
MIPS: ath79: don't hardcode the unavailability of the DSP ASE
MIPS: Synchronize MIPS count one CPU at a time
MIPS: BCM63xx: Fix SPI message control register handling for BCM6338/6348.
MIPS: Module: Deal with malformed HI16/LO16 relocation sequences.
MIPS: Fix race condition in module relocation code.
MIPS: Fix memory leak in error path of HI16/LO16 relocation handling.
MIPS: MTX-1: Add udelay to mtx1_pci_idsel
MIPS: ath79: select HAVE_CLK
MIPS: ath79: Use correct IRQ number for the OHCI controller on AR7240
MIPS: ath79: Fix number of GPIO lines for AR724[12]
MIPS: Octeon: Fix broken interrupt controller code.
Pull nfsd bugfixes from J. Bruce Fields:
"Particular thanks to Michael Tokarev, Malahal Naineni, and Jamie
Heilman for their testing and debugging help."
* 'for-3.6' of git://linux-nfs.org/~bfields/linux:
svcrpc: fix svc_xprt_enqueue/svc_recv busy-looping
svcrpc: sends on closed socket should stop immediately
svcrpc: fix BUG() in svc_tcp_clear_pages
nfsd4: fix security flavor of NFSv4.0 callback
Pull block-related fixes from Jens Axboe:
- Improvements to the buffered and direct write IO plugging from
Fengguang.
- Abstract out the mapping of a bio in a request, and use that to
provide a blk_bio_map_sg() helper. Useful for mapping just a bio
instead of a full request.
- Regression fix from Hugh, fixing up a patch that went into the
previous release cycle (and marked stable, too) attempting to prevent
a loop in __getblk_slow().
- Updates to discard requests, fixing up the sizing and how we align
them. Also a change to disallow merging of discard requests, since
that doesn't really work properly yet.
- A few drbd fixes.
- Documentation updates.
* 'for-linus' of git://git.kernel.dk/linux-block:
block: replace __getblk_slow misfix by grow_dev_page fix
drbd: Write all pages of the bitmap after an online resize
drbd: Finish requests that completed while IO was frozen
drbd: fix drbd wire compatibility for empty flushes
Documentation: update tunable options in block/cfq-iosched.txt
Documentation: update tunable options in block/cfq-iosched.txt
Documentation: update missing index files in block/00-INDEX
block: move down direct IO plugging
block: remove plugging at buffered write time
block: disable discard request merge temporarily
bio: Fix potential memory leak in bio_find_or_create_slab()
block: Don't use static to define "void *p" in show_partition_start()
block: Add blk_bio_map_sg() helper
block: Introduce __blk_segment_map_sg() helper
fs/block-dev.c:fix performance regression in O_DIRECT writes to md block devices
block: split discard into aligned requests
block: reorganize rounding of max_discard_sectors
2) additional or corrected drive quirks for ata_blacklist
3) Kconfig text tweaking
4) new PCI IDs
5) pata_atiixp: quirk for MSI motherboard
6) export ahci_dev_classify for an ahci_platform driver
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Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
Pull libata fixes from Jeff Garzik:
- libata-acpi regression fix
- additional or corrected drive quirks for ata_blacklist
- Kconfig text tweaking
- new PCI IDs
- pata_atiixp: quirk for MSI motherboard
- export ahci_dev_classify for an ahci_platform driver
* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry
[libata] new quirk, lift bridge limits for Buffalo DriveStation Quattro
[libata] Kconfig: Elaborate that SFF is meant for legacy and PATA stuff
[libata] acpi: call ata_acpi_gtm during ata port init time
ata_piix: Add Device IDs for Intel Lynx Point-LP PCH
ahci: Add Device IDs for Intel Lynx Point-LP PCH
pata_atiixp: override cable detection on MSI E350DM-E33
ahci: un-staticize ahci_dev_classify
commit d70e551c8e, Add " 2GB ATA Flash
Disk"/"ADMA428M" to DMA blacklist, should have added a space before 2GB.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
The GPIO buttons are named SW3, SW4, SW5 and SW6 on the board
silkscreen. Update the buttons descriptions accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Ben Hutchings says:
====================
Simple fix for a braino. Please also queue this for the 3.4 and 3.5
stable series.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Marc Kleine-Budde says:
====================
here are two fixes for the v3.6 release cycle. Alexey Khoroshilov submitted a
fix for a memory leak in the softing driver (in softing_load_fw()) in case a
krealloc() fails. Sven Schmitt fixed the misuse of the IRQF_SHARED flag in the
irq resouce of the sja1000 platform driver, now the correct flag is used. There
are no mainline users of this feature which need to be converted.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
John W. Linville says:
====================
This batch of fixes is intended for 3.6...
Johannes Berg gives us a pair of iwlwifi fixes. One corrects some
improperly defined ifdefs that lead to crashes and BUG_ONs. The other
prevents attempts to read SRAM for devices that aren't actually started.
Julia Lawall provides an ipw2100 fix to properly set the return code
from a function call before testing it! :-)
Thomas Huehn corrects the improper use of a constant related to a power
setting in ath5k.
Thomas Pedersen offers a mac80211 fix to properly handle destination
addresses of unicast frames passing though a mesh gate.
Vladimir Zapolskiy provides a brcmsmac fix to properly mark the
interface state when the device goes down.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
