27 Mar, 2013
1 commit
-
It turns out that some UEFI systems provide apparently an apparently valid
PCI ROM BAR that turns out to contain garbage, so the attempt in 547b52463
to prefer the ROM from the BAR actually breaks a different set of machines.
As Linus pointed out, the graphics drivers are probably in the best
position to make this judgement, so this basically reverts 547b52463 and
f9a37be0f and adds a new helper function. Followup patches will add support
to nouveau and radeon for probing this ROM source if they can't find a ROM
from some other source.[bhelgaas: added reporter and bugzilla pointers, s/f4eb5ff05/547b52463]
Reference: https://bugzilla.redhat.com/show_bug.cgi?id=927451
Reference: http://lkml.kernel.org/r/kg69ef$vdb$1@ger.gmane.org
Reported-by: Mantas Mikulėnas
Reported-by: Chris Murphy
Signed-off-by: Matthew Garrett
Signed-off-by: Bjorn Helgaas
24 Mar, 2013
8 commits
-
Pull SCSI target fixes from Nicholas Bellinger:
"These are mostly minor fixes this time around. The iscsi-target CHAP
big-endian bugfix and bump FD_MAX_SECTORS=2048 default patch to allow
1MB sized I/Os for FILEIO backends on >= v3.5 code are both CC'ed to
stable.Also, there is a persistent reservations regression that has recently
been reported for >= v3.8.x code, that is currently being tracked down
for v3.9."* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
target/pscsi: Reject cross page boundary case in pscsi_map_sg
target/file: Bump FD_MAX_SECTORS to 2048 to handle 1M sized I/Os
tcm_vhost: Flush vhost_work in vhost_scsi_flush()
tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint()
target: fix possible memory leak in core_tpg_register()
target/iscsi: Fix mutual CHAP auth on big-endian arches
target_core_sbc: use noop for SYNCHRONIZE_CACHE -
Pull md fixes from NeilBrown:
"A few bugfixes for md- recent regressions in raid5
- recent regressions in dmraid
- a few instances of CONFIG_MULTICORE_RAID456 lingerSeveral tagged for -stable"
* tag 'md-3.9-fixes' of git://neil.brown.name/md:
md: remove CONFIG_MULTICORE_RAID456 entirely
md/raid5: ensure sync and DISCARD don't happen at the same time.
MD: Prevent sysfs operations on uninitialized kobjects
MD RAID5: Avoid accessing gendisk or queue structs when not available
md/raid5: schedule_construction should abort if nothing to do. -
Pull libata updates from Jeff Garzik:
"Simple stuff. See one-line summaries."* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
pata_samsung_cf: use module_platform_driver_probe()
[libata] Avoid specialized TLA's in ZPODD's Kconfig
libata-acpi.c: fix copy and paste mistake in ata_acpi_register_power_resource
sata_fsl: Remove redundant NULL check before kfree
ahci: Add Device IDs for Intel Wellsburg PCH
ata_piix: Add MODULE_PARM_DESC to prefer_ms_hyperv -
Pull i2c fixes from Wolfram Sang:
"One bugfix for the tegra driver. Two updates regarding email
addresses and MAINTAINERS which I like to have up-to-date so people
can be reached immediately. While we are here, there is on PCI_ID
addition."* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
MAINTAINERS: add maintainer entry for atmel i2c driver
i2c: Fix my e-mail address in drivers and documentation
i2c: iSMT: add Intel Avoton DeviceIDs
i2c: tegra: check the clk_prepare_enable() return value -
Pull watchdog fixes from Wim Van Sebroeck:
"Fix a boot issues and correct the AcpiMmioSel bitmask in the
sp5100_tco watchdog device driver"* git://www.linux-watchdog.org/linux-watchdog:
watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
watchdog: sp5100_tco: Remove code that may cause a boot failure -
When KMS has parsed an EDID "detailed timing", it leaves the frame rate
zeroed. Consecutive (debug-) output of that mode thus yields 0 for
vsync. This simple fix also speeds up future invocations of
drm_mode_vrefresh().While it is debatable whether this qualifies as a -stable fix I'd apply
it for consistency's sake; drm_helper_probe_single_connector_modes()
does the same thing already for all probed modes.Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe
Signed-off-by: Linus Torvalds -
EDID spreads some values across multiple bytes; bit-fiddling is needed
to retrieve these. The current code to parse "detailed timings" has a
cut&paste error that results in a vsync offset of at most 15 lines
instead of 63.See
http://en.wikipedia.org/wiki/EDID
and in the "EDID Detailed Timing Descriptor" see bytes 10+11 show why
that needs to be a left shift.Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe
Signed-off-by: Linus Torvalds
23 Mar, 2013
22 commits
-
Pull NVMe driver update from Matthew Wilcox:
"These patches have mostly been baking for a few months; sorry I didn't
get them in during the merge window. They're all bug fixes, except
for the addition of the SMART log and the addition to MAINTAINERS."* git://git.infradead.org/users/willy/linux-nvme:
NVMe: Add namespaces with no LBA range feature
MAINTAINERS: Add entry for the NVMe driver
NVMe: Initialize iod nents to 0
NVMe: Define SMART log
NVMe: Add result to nvme_get_features
NVMe: Set result from user admin command
NVMe: End queued bio requests when freeing queue
NVMe: Free cmdid on nvme_submit_bio error -
Merge misc fixes from Andrew Morton.
* emailed patches from Andrew Morton :
mqueue: sys_mq_open: do not call mnt_drop_write() if read-only
mm/hotplug: only free wait_table if it's allocated by vmalloc
dma-debug: update DMA debug API to better handle multiple mappings of a buffer
dma-debug: fix locking bug in check_unmap()
drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR
drivers/video/ep93xx-fb.c: include for devm_ioremap()
drivers/rtc/rtc-da9052.c: fix for rtc device registration
mm: zone_end_pfn is too small
poweroff: change orderly_poweroff() to use schedule_work()
mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting
printk: Provide a wake_up_klogd() off-case
irq_work.h: fix warning when CONFIG_IRQ_WORK=n -
mnt_drop_write() must be called only if mnt_want_write() succeeded,
otherwise the mnt_writers counter will diverge.mnt_writers counters are used to check if remounting FS as read-only is
OK, so after an extra mnt_drop_write() call, it would be impossible to
remount mqueue FS as read-only. Besides, on umount a warning would be
printed like this one:=====================================
[ BUG: bad unlock balance detected! ]
3.9.0-rc3 #5 Not tainted
-------------------------------------
a.out/12486 is trying to release lock (sb_writers) at:
mnt_drop_write+0x1f/0x30
but there are no more locks to release!Signed-off-by: Vladimir Davydov
Cc: Doug Ledford
Cc: KOSAKI Motohiro
Cc: "Eric W. Biederman"
Cc: Al Viro
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
zone->wait_table may be allocated from bootmem, it can not be freed.
Signed-off-by: Jianguo Wu
Reviewed-by: Tang Chen
Cc: Tang Chen
Cc: Jiang Liu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There were reports of the igb driver unmapping buffers without calling
dma_mapping_error. On closer inspection issues were found in the DMA
debug API and how it handled multiple mappings of the same buffer.The issue I found is the fact that the debug_dma_mapping_error would
only set the map_err_type to MAP_ERR_CHECKED in the case that the was
only one match for device and device address. However in the case of
non-IOMMU, multiple addresses existed and as a result it was not setting
this field once a second mapping was instantiated. I have resolved this
by changing the search so that it instead will now set MAP_ERR_CHECKED
on the first buffer that matches the device and DMA address that is
currently in the state MAP_ERR_NOT_CHECKED.A secondary side effect of this patch is that in the case of multiple
buffers using the same address only the last mapping will have a valid
map_err_type. The previous mappings will all end up with map_err_type
set to MAP_ERR_CHECKED because of the dma_mapping_error call in
debug_dma_map_page. However this behavior may be preferable as it means
you will likely only see one real error per multi-mapped buffer, versus
the current behavior of multiple false errors mer multi-mapped buffer.Signed-off-by: Alexander Duyck
Cc: Joerg Roedel
Reviewed-by: Shuah Khan
Tested-by: Shuah Khan
Cc: Jakub Kicinski
Cc: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In check_unmap() it is possible to get into a dead-locked state if
dma_mapping_error is called. The problem is that the bucket is locked in
check_unmap, and locked again by debug_dma_mapping_error which is called
by dma_mapping_error. To resolve that we must release the lock on the
bucket before making the call to dma_mapping_error.[akpm@linux-foundation.org: restore 80-col trickery to be consistent with the rest of the file]
Signed-off-by: Alexander Duyck
Cc: Joerg Roedel
Reviewed-by: Shuah Khan
Tested-by: Shuah Khan
Cc: Jakub Kicinski
Cc: Konrad Rzeszutek Wilk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On some revisions of AT91 SoCs, the RTC IMR register is not working.
Instead of elaborating a workaround for that specific SoC or IP version,
we simply use a software variable to store the Interrupt Mask Register
and modify it for each enabling/disabling of an interrupt. The overhead
of this is negligible anyway.The interrupt mask register (IMR) for the RTC is broken on the AT91SAM9x5
sub-family of SoCs (good overview of the members here:
http://www.eewiki.net/display/linuxonarm/AT91SAM9x5 ). The "user visible
effect" is the RTC doesn't work.That sub-family is less than two years old and only has devicetree (DT)
support and came online circa lk 3.7 . The dust is yet to settle on the
DT stuff at least for AT91 SoCs (translation: lots of stuff is still
broken, so much that it is hard to know where to start).The fix in the patch is pretty simple: just shadow the silicon IMR
register with a variable in the driver. Some older SoCs (pre-DT) use the
the rtc-at91rm9200 driver (e.g. obviously the AT91RM9200) and they should
not be impacted by the change. There shouldn't be a large volume of
interrupts associated with a RTC.Signed-off-by: Nicolas Ferre
Reported-by: Douglas Gilbert
Cc: Jean-Christophe PLAGNIOL-VILLARD
Cc: Ludovic Desroches
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit be8678149701 ("drivers/video/ep93xx-fb.c: use devm_ functions")
introduced a build error:drivers/video/ep93xx-fb.c: In function 'ep93xxfb_probe':
drivers/video/ep93xx-fb.c:532: error: implicit declaration of function 'devm_ioremap'
drivers/video/ep93xx-fb.c:533: warning: assignment makes pointer from integer without a castInclude to pickup the declaration of 'devm_ioremap'.
Signed-off-by: H Hartley Sweeten
Cc: Florian Tobias Schandinat
Acked-by: Ryan Mallon
Cc: Damien Cassou
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support for the virtual irq since now MFD only handles virtual irq
Without this patch rtc device will fail in registration.(akpm: Ashish has a different version whcih will be needed for 3.8.x and
earlier kernels)Signed-off-by: Ashish
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Booting with 32 TBytes memory hits BUG at mm/page_alloc.c:552! (output
below).The key hint is "page 4294967296 outside zone".
4294967296 = 0x100000000 (bit 32 is set).The problem is in include/linux/mmzone.h:
530 static inline unsigned zone_end_pfn(const struct zone *zone)
531 {
532 return zone->zone_start_pfn + zone->spanned_pages;
533 }zone_end_pfn is "unsigned" (32 bits). Changing it to "unsigned long"
(64 bits) fixes the problem.zone_end_pfn() was added recently in commit 108bcc96ef70 ("mm: add & use
zone_end_pfn() and zone_spans_pfn()")Output from the failure.
No AGP bridge found
page 4294967296 outside zone [ 4294967296 - 4327469056 ]
------------[ cut here ]------------
kernel BUG at mm/page_alloc.c:552!
invalid opcode: 0000 [#1] SMP
Modules linked in:
CPU 0
Pid: 0, comm: swapper Not tainted 3.9.0-rc2.dtp+ #10
RIP: free_one_page+0x382/0x430
Process swapper (pid: 0, threadinfo ffffffff81942000, task ffffffff81955420)
Call Trace:
__free_pages_ok+0x96/0xb0
__free_pages+0x25/0x50
__free_pages_bootmem+0x8a/0x8c
__free_memory_core+0xea/0x131
free_low_memory_core_early+0x4a/0x98
free_all_bootmem+0x45/0x47
mem_init+0x7b/0x14c
start_kernel+0x216/0x433
x86_64_start_reservations+0x2a/0x2c
x86_64_start_kernel+0x144/0x153
Code: 89 f1 ba 01 00 00 00 31 f6 d3 e2 4c 89 ef e8 66 a4 01 00 e9 2c fe ff ff 0f 0b eb fe 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 eb f3 0b eb fe 0f 0b 0f 1f 84 00 00 00 00 00 eb f6 0f 0b eb fe 49Signed-off-by: Russ Anderson
Reported-by: George Beshers
Acked-by: Hedi Berriche
Cc: Cody P Schafer
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
David said:
Commit 6c0c0d4d1080 ("poweroff: fix bug in orderly_poweroff()")
apparently fixes one bug in orderly_poweroff(), but introduces
another. The comments on orderly_poweroff() claim it can be called
from any context - and indeed we call it from interrupt context in
arch/powerpc/platforms/pseries/ras.c for example. But since that
commit this is no longer safe, since call_usermodehelper_fns() is not
safe in interrupt context without the UMH_NO_WAIT option.orderly_poweroff() can be used from any context but UMH_WAIT_EXEC is
sleepable. Move the "force" logic into __orderly_poweroff() and change
orderly_poweroff() to use the global poweroff_work which simply calls
__orderly_poweroff().While at it, remove the unneeded "int argc" and change argv_split() to
use GFP_KERNEL.We use the global "bool poweroff_force" to pass the argument, this can
obviously affect the previous request if it is pending/running. So we
only allow the "false => true" transition assuming that the pending
"true" should succeed anyway. If schedule_work() fails after that we
know that work->func() was not called yet, it must see the new value.This means that orderly_poweroff() becomes async even if we do not run
the command and always succeeds, schedule_work() can only fail if the
work is already pending. We can export __orderly_poweroff() and change
the non-atomic callers which want the old semantics.Signed-off-by: Oleg Nesterov
Reported-by: Benjamin Herrenschmidt
Reported-by: David Gibson
Cc: Lucas De Marchi
Cc: Feng Hong
Cc: Kees Cook
Cc: Serge Hallyn
Cc: "Eric W. Biederman"
Cc: "Rafael J. Wysocki"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
hugetlb_total_pages is used for overcommit calculations but the current
implementation considers only the default hugetlb page size (which is
either the first defined hugepage size or the one specified by
default_hugepagesz kernel boot parameter).If the system is configured for more than one hugepage size, which is
possible since commit a137e1cc6d6e ("hugetlbfs: per mount huge page
sizes") then the overcommit estimation done by __vm_enough_memory()
(resp. shown by meminfo_proc_show) is not precise - there is an
impression of more available/allowed memory. This can lead to an
unexpected ENOMEM/EFAULT resp. SIGSEGV when memory is accounted.Testcase:
boot: hugepagesz=1G hugepages=1
the default overcommit ratio is 50
before patch:egrep 'CommitLimit' /proc/meminfo
CommitLimit: 55434168 kBafter patch:
egrep 'CommitLimit' /proc/meminfo
CommitLimit: 54909880 kB[akpm@linux-foundation.org: coding-style tweak]
Signed-off-by: Wanpeng Li
Acked-by: Michal Hocko
Cc: "Aneesh Kumar K.V"
Cc: Hillf Danton
Cc: KAMEZAWA Hiroyuki
Cc: [3.0+]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
wake_up_klogd() is useless when CONFIG_PRINTK=n because neither printk()
nor printk_sched() are in use and there are actually no waiter on
log_wait waitqueue. It should be a stub in this case for users like
bust_spinlocks().Otherwise this results in this warning when CONFIG_PRINTK=n and
CONFIG_IRQ_WORK=n:kernel/built-in.o In function `wake_up_klogd':
(.text.wake_up_klogd+0xb4): undefined reference to `irq_work_queue'To fix this, provide an off-case for wake_up_klogd() when
CONFIG_PRINTK=n.There is much more from console_unlock() and other console related code
in printk.c that should be moved under CONFIG_PRINTK. But for now,
focus on a minimal fix as we passed the merged window already.[akpm@linux-foundation.org: include printk.h in bust_spinlocks.c]
Signed-off-by: Frederic Weisbecker
Reported-by: James Hogan
Cc: James Hogan
Cc: Steven Rostedt
Cc: Peter Zijlstra
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A randconfig caught repeated compiler warnings when CONFIG_IRQ_WORK=n
due to the definition of a non-inline static function in
:include/linux/irq_work.h +40 : warning: 'irq_work_needs_cpu' defined but not used
Make it inline to supress the warning. This is caused commit
00b42959106a ("irq_work: Don't stop the tick with pending works") merged
in v3.9-rc1.Signed-off-by: James Hogan
Signed-off-by: Frederic Weisbecker
Cc: Steven Rostedt
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The AcpiMmioSel bit is bit 1 in the AcpiMmioEn register, but the current
sp5100_tco driver is using bit 2.See 2.3.3 Power Management (PM) Registers page 150 of the
AMD SB800-Series Southbridges Register Reference Guide [1].AcpiMmioEn - RW – 8/16/32 bits - [PM_Reg: 24h]
Field Name Bits Default Description
AcpiMMioDecodeEn 0 0b Set to 1 to enable AcpiMMio space.
AcpiMMIoSel 1 0b Set AcpiMMio registers to be memory-mapped or IO-mapped space.
0: Memory-mapped space
1: I/O-mapped spaceThe sp5100_tco driver expects zero as a value of AcpiMmioSel (bit 1).
Fortunately, no problems were caused by this typo, because the default
value of the undocumented misused bit 2 seems to be zero.However, the sp5100_tco driver should use the correct bitmask value.
[1] http://support.amd.com/us/Embedded_TechDocs/45482.pdf
Signed-off-by: Takahisa Tanaka
Signed-off-by: Paul Menzel
Signed-off-by: Wim Van Sebroeck
Cc: stable -
A problem was found on PC's with the SB700 chipset: The PC fails to
load BIOS after running the 3.8.x kernel until the power is completely
cut off. It occurs in all 3.8.x versions and the mainline version as of
2/4. The issue does not occur with the 3.7.x builds.There are two methods for accessing the watchdog registers.
1. Re-programming a resource address obtained by allocate_resource()
to chipset.
2. Use the direct memory-mapped IO access.The method 1 can be used by all the chipsets (SP5100, SB7x0, SB8x0 or
later). However, experience shows that only PC with the SB8x0 (or
later) chipsets can use the method 2.This patch removes the method 1, because the critical problem was found.
That's why the watchdog timer was able to be used on SP5100 and SB7x0
chipsets until now.Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1116835
Link: https://lkml.org/lkml/2013/2/14/271Signed-off-by: Takahisa Tanaka
Signed-off-by: Wim Van Sebroeck
Cc: stable -
Pull KVM fix from Marcelo Tosatti:
"Fix compilation on PPC with !CONFIG_KVM"* git://git.kernel.org/pub/scm/virt/kvm/kvm:
Revert "KVM: allow host header to be included even for !CONFIG_KVM" -
Pull USB fixes from Greg Kroah-Hartman:
"Here are a number of USB fixes that resolve issues that have been
reported against 3.9-rc3."* tag 'usb-3.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (37 commits)
USB: ti_usb_3410_5052: fix use-after-free in TIOCMIWAIT
USB: ssu100: fix use-after-free in TIOCMIWAIT
USB: spcp8x5: fix use-after-free in TIOCMIWAIT
USB: quatech2: fix use-after-free in TIOCMIWAIT
USB: pl2303: fix use-after-free in TIOCMIWAIT
USB: oti6858: fix use-after-free in TIOCMIWAIT
USB: mos7840: fix use-after-free in TIOCMIWAIT
USB: mos7840: fix broken TIOCMIWAIT
USB: mct_u232: fix use-after-free in TIOCMIWAIT
USB: io_ti: fix use-after-free in TIOCMIWAIT
USB: io_edgeport: fix use-after-free in TIOCMIWAIT
USB: ftdi_sio: fix use-after-free in TIOCMIWAIT
USB: f81232: fix use-after-free in TIOCMIWAIT
USB: cypress_m8: fix use-after-free in TIOCMIWAIT
USB: ch341: fix use-after-free in TIOCMIWAIT
USB: ark3116: fix use-after-free in TIOCMIWAIT
USB: serial: add modem-status-change wait queue
USB: serial: fix interface refcounting
USB: io_ti: fix get_icount for two port adapters
USB: garmin_gps: fix memory leak on disconnect
... -
Pull sound fixes from Takashi Iwai:
"Mostly HD-audio and USB-audio regression fixes:
- Oops fix at unloading of snd-hda-codec-conexant module
- A few trivial regression fixes for Cirrus and Conexant HD-audio
codecs
- Relax the USB-audio descriptor parse errors as non-fatal
- Fix locking of HD-audio CA0132 DSP loader
- Fix the generic HD-audio parser for VIA codecs"* tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix DAC assignment for independent HP
ALSA: hda - Fix abuse of snd_hda_lock_devices() for DSP loader
ALSA: hda - Fix typo in checking IEC958 emphasis bit
ALSA: snd-usb: mixer: ignore -EINVAL in snd_usb_mixer_controls()
ALSA: snd-usb: mixer: propagate errors up the call chain
ALSA: usb: Parse UAC2 extension unit like for UAC1
ALSA: hda - Fix yet missing GPIO/EAPD setup in cirrus driver
ALSA: hda/cirrus - Fix the digital beep registration
ALSA: hda - Fix missing beep detach in patch_conexant.c
ALSA: documentation: Fix typo in Documentation/sound -
Pull EDAC fixes from Borislav Petkov:
"A fix from Mauro to correct csrow size accounting in sysfs and a
sparse fix from Stephen Hemminger."* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC: Merge mci.mem_is_per_rank with mci.csbased
amd64_edac: Correct DIMM sizes
EDAC: Make sysfs functions static -
The LBA Range Type feature is optional in the NVMe specification,
so we should continue with adding namespaces for controllers that do
not implement this feature.Signed-off-by: Keith Busch
Signed-off-by: Matthew Wilcox -
Dave Jones found another /proc issue with his Trinity tool: thanks to
the namespace model, we can have multiple /proc dentries that point to
the same inode, aliasing directories in /proc//net/ for example.This ends up being a total disaster, because it acts like hardlinked
directories, and causes locking problems. We rely on the topological
sort of the inodes pointed to by dentries, and if we have aliased
directories, that odering becomes unreliable.In short: don't do this. Multiple dentries with the same (directory)
inode is just a bad idea, and the namespace code should never have
exposed things this way. But we're kind of stuck with it.This solves things by just always allocating a new inode during /proc
dentry lookup, instead of using "iget_locked()" to look up existing
inodes by superblock and number. That actually simplies the code a bit,
at the cost of potentially doing more inode [de]allocations.That said, the inode lookup wasn't free either (and did a lot of locking
of inodes), so it is probably not that noticeable. We could easily keep
the old lookup model for non-directory entries, but rather than try to
be excessively clever this just implements the minimal and simplest
workaround for the problem.Reported-and-tested-by: Dave Jones
Analyzed-by: Al Viro
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds
22 Mar, 2013
9 commits
-
This reverts commit f445f11eb2cc265dd47da5b2e864df46cd6e5a82 as
it breaks PPC with CONFIG_KVM=n.Signed-off-by: Marcelo Tosatti
-
Create an entry for atmel i2c driver: i2c-at91.c
Signed-off-by: Ludovic Desroches
Acked-by: Nicolas Ferre
Signed-off-by: Wolfram Sang -
My old e-mail address is no longer working.
Signed-off-by: Guenter Roeck
Signed-off-by: Wolfram Sang -
This patch adds the iSMT SMBus Controller DeviceIDs for the Intel Avoton SOC.
Signed-off-by: Seth Heasley
Acked-by: Neil Horman
Signed-off-by: Wolfram Sang -
NVIDIA's Tegra SoC allows read/write of controller register only
if controller clock is enabled. System hangs if read/write happens
to registers without enabling clock.clk_prepare_enable() can be fail due to unknown reason and hence
adding check for return value of this function. If this function
success then only access register otherwise return to caller with
error.Signed-off-by: Laxman Dewangan
Reviewed-by: Stephen Warren
Signed-off-by: Wolfram Sang
Cc: stable@kernel.org -
Pull CIFS fixes from Steve French:
"Three small CIFS Fixes (the most important of the three fixes a recent
problem authenticating to Windows 8 using cifs rather than SMB2)"* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
cifs: ignore everything in SPNEGO blob after mechTypes
cifs: delay super block destruction until all cifsFileInfo objects are gone
cifs: map NT_STATUS_SHARING_VIOLATION to EBUSY instead of ETXTBSY -
Pull ext4 fixes from Ted Ts'o:
"Fix a number of regression and other bugs in ext4, most of which were
relatively obscure cornercases or races that were found using
regression tests."* tag 'ext4_for_linue' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (21 commits)
ext4: fix data=journal fast mount/umount hang
ext4: fix ext4_evict_inode() racing against workqueue processing code
ext4: fix memory leakage in mext_check_coverage
ext4: use s_extent_max_zeroout_kb value as number of kb
ext4: use atomic64_t for the per-flexbg free_clusters count
jbd2: fix use after free in jbd2_journal_dirty_metadata()
ext4: reserve metadata block for every delayed write
ext4: update reserved space after the 'correction'
ext4: do not use yield()
ext4: remove unused variable in ext4_free_blocks()
ext4: fix WARN_ON from ext4_releasepage()
ext4: fix the wrong number of the allocated blocks in ext4_split_extent()
ext4: update extent status tree after an extent is zeroed out
ext4: fix wrong m_len value after unwritten extent conversion
ext4: add self-testing infrastructure to do a sanity check
ext4: avoid a potential overflow in ext4_es_can_be_merged()
ext4: invalidate extent status tree during extent migration
ext4: remove unnecessary wait for extent conversion in ext4_fallocate()
ext4: add warning to ext4_convert_unwritten_extents_endio
ext4: disable merging of uninitialized extents
... -
Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.Cc: stable
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman -
Use the port wait queue and make sure to check the serial disconnected
flag before accessing private port data after waking up.This is is needed as the private port data (including the wait queue
itself) can be gone when waking up after a disconnect.Cc: stable
Signed-off-by: Johan Hovold
Signed-off-by: Greg Kroah-Hartman
