Commit Graph

40464 Commits

Author SHA1 Message Date
Linus Torvalds
46bdfe6a50 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  x86: avoid high BIOS area when allocating address space
  x86: avoid E820 regions when allocating address space
  x86: avoid low BIOS area when allocating address space
  resources: add arch hook for preventing allocation in reserved areas
  Revert "resources: support allocating space within a region from the top down"
  Revert "PCI: allocate bus resources from the top down"
  Revert "x86/PCI: allocate space from the end of a region, not the beginning"
  Revert "x86: allocate space within a region top-down"
  Revert "PCI: fix pci_bus_alloc_resource() hang, prefer positive decode"
  PCI: Update MCP55 quirk to not affect non HyperTransport variants
2010-12-18 10:13:24 -08:00
Bjorn Helgaas
fcb119183c resources: add arch hook for preventing allocation in reserved areas
This adds arch_remove_reservations(), which an arch can implement if it
needs to protect part of the address space from allocation.

Sometimes that can be done by just putting a region in the resource tree,
but there are cases where that doesn't work well.  For example, x86 BIOS
E820 reservations are not related to devices, so they may overlap part of,
all of, or more than a device resource, so they may not end up at the
correct spot in the resource tree.

Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-12-17 10:01:09 -08:00
Bjorn Helgaas
c0f5ac5426 Revert "resources: support allocating space within a region from the top down"
This reverts commit e7f8567db9.

Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-12-17 10:00:59 -08:00
Linus Torvalds
508817e7cd Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Runtime: Fix pm_runtime_suspended()
  PM / Hibernate: Restore old swap signature to avoid user space breakage
  PM / Hibernate: Fix PM_POST_* notification with user-space suspend
2010-12-17 09:31:59 -08:00
Linus Torvalds
8efc1a1a22 Merge branch 'bkl_removal' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'bkl_removal' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] uvcvideo: Convert to unlocked_ioctl
  [media] uvcvideo: Lock stream mutex when accessing format-related information
  [media] uvcvideo: Move mmap() handler to uvc_queue.c
  [media] uvcvideo: Move mutex lock/unlock inside uvc_free_buffers
  [media] uvcvideo: Lock controls mutex when querying menus
  [media] v4l2-dev: fix race condition
  [media] V4L: improve the BKL replacement heuristic
  [media] v4l2-dev: use mutex_lock_interruptible instead of plain mutex_lock
  [media] cx18: convert to unlocked_ioctl
  [media] radio-timb: convert to unlocked_ioctl
  [media] sh_vou: convert to unlocked_ioctl
  [media] cafe_ccic: replace ioctl by unlocked_ioctl
  [media] et61x251_core: trivial conversion to unlocked_ioctl
  [media] sn9c102: convert to unlocked_ioctl
  [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions
  [media] typhoon: convert to unlocked_ioctl
  [media] si4713: convert to unlocked_ioctl
  [media] tea5764: convert to unlocked_ioctl
  [media] cadet: use unlocked_ioctl
  [media] BKL: trivial BKL removal from V4L2 radio drivers
2010-12-17 09:28:17 -08:00
Linus Torvalds
a3383e8372 Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify
* 'for-linus' of git://git.infradead.org/users/eparis/notify:
  fanotify: fill in the metadata_len field on struct fanotify_event_metadata
  fanotify: split version into version and metadata_len
  fanotify: Dont try to open a file descriptor for the overflow event
  fanotify: Introduce FAN_NOFD
  fanotify: do not leak user reference on allocation failure
  inotify: stop kernel memory leak on file creation failure
  fanotify: on group destroy allow all waiters to bypass permission check
  fanotify: Dont allow a mask of 0 if setting or removing a mark
  fanotify: correct broken ref counting in case adding a mark failed
  fanotify: if set by user unset FMODE_NONOTIFY before fsnotify_perm() is called
  fanotify: remove packed from access response message
  fanotify: deny permissions when no event was sent
2010-12-16 15:45:49 -08:00
Linus Torvalds
68a4ec9c03 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (28 commits)
  MIPS: Add a CONFIG_FORCE_MAX_ZONEORDER Kconfig option.
  MIPS: LD/SD o32 macro GAS fix update
  MIPS: Alchemy: fix build with SERIAL_8250=n
  MIPS: Rename mips_dma_cache_sync back to dma_cache_sync
  MIPS: MT: Fix typo in comment.
  SSB: Fix nvram_get on BCM47xx platform
  MIPS: BCM47xx: Swap serial console if ttyS1 was specified.
  MIPS: BCM47xx: Use sscanf for parsing mac address
  MIPS: BCM47xx: Fill values for b43 into SSB sprom
  MIPS: BCM47xx: Do not read config from CFE
  MIPS: FDT size is a be32
  MIPS: Fix CP0 COUNTER clockevent race
  MIPS: Fix regression on BCM4710 processor detection
  MIPS: JZ4740: Fix pcm device name
  MIPS: Separate two consecutive loads in memset.S
  MIPS: Send proper signal and siginfo on FP emulator faults.
  MIPS: AR7: Fix loops per jiffies on TNETD7200 devices
  MIPS: AR7: Fix double ar7_gpio_init declaration
  MIPS: Rework GENERIC_HARDIRQS Kconfig.
  MIPS: Alchemy: Add return value check for strict_strtoul()
  ...
2010-12-16 15:45:25 -08:00
Hauke Mehrtens
3f84622d7c SSB: Fix nvram_get on BCM47xx platform
The nvram_get function was never in the mainline kernel, it only existed in
an external OpenWrt patch. Use nvram_getenv function, which is in mainline
and use an include instead of an extra function declaration.  et0macaddr
contains the mac address in text from like 00:11:22:33:44:55. We have to
parse it before adding it into macaddr.

nvram_parse_macaddr will be merged into asm/mach-bcm47xx/nvram.h through
the MIPS git tree and will be available soon. It will not build now without
nvram_parse_macaddr, but it hasn't before either.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: mb@bu3sch.de
Cc: netdev@vger.kernel.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Michael Buesch <mb@bu3sch.de>
Patchwork: https://patchwork.linux-mips.org/patch/1849/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-12-16 18:11:00 +00:00
Linus Torvalds
9fe4145530 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: define separate EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2
  Input: wacom - add another Bamboo Pen ID (0xd4)
2010-12-16 08:33:44 -08:00
Rafael J. Wysocki
f08f5a0add PM / Runtime: Fix pm_runtime_suspended()
There are some situations (e.g. in __pm_generic_call()), where
pm_runtime_suspended() is used to decide whether or not to execute
a device's (system) ->suspend() callback.  The callback is not
executed if pm_runtime_suspended() returns true, but it does so
for devices that don't even support runtime PM, because the
power.disable_depth device field is ignored by it.  This leads to
problems (i.e. devices are not suspened when they should), so rework
pm_runtime_suspended() so that it returns false if the device's
power.disable_depth field is different from zero.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org
2010-12-16 17:12:25 +01:00
Jeremy Fitzhardinge
667c78afae xen: Provide a variant of __RING_SIZE() that is an integer constant expression
Without this, gcc 4.5 won't compile xen-netfront and xen-blkfront, where
this is being used to specify array sizes.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: David Miller <davem@davemloft.net>
Cc: Stable Kernel <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-15 12:34:28 -08:00
Alexey Zaytsev
62731fa0c8 fanotify: split version into version and metadata_len
To implement per event type optional headers we are interested in
knowing how long the metadata structure is.  This patch slits the __u32
version field into a __u8 version and a __u16 metadata_len field (with
__u8 left over).  This should allow for backwards compat ABI.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
[rewrote descrtion and changed object sizes and ordering - eparis]
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-12-15 13:56:33 -05:00
Dmitry Torokhov
ab4e019219 Input: define separate EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2
The desire to keep old names for the EVIOCGKEYCODE/EVIOCSKEYCODE while
extending them to support large scancodes was a mistake. While we tried
to keep ABI intact (and we succeeded in doing that, programs compiled
on older kernels will work on newer ones) there is still a problem with
recompiling existing software with newer kernel headers.

New kernel headers will supply updated ioctl numbers and kernel will
expect that userspace will use struct input_keymap_entry to set and
retrieve keymap data. But since the names of ioctls are still the same
userspace will happily compile even if not adjusted to make use of the
new structure and will start miraculously fail in the field.

To avoid this issue let's revert EVIOCGKEYCODE/EVIOCSKEYCODE definitions
and add EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2 so that userspace can explicitly
select the style of ioctls it wants to employ.

Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Acked-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-12-14 23:55:21 -08:00
Linus Torvalds
b4fe2a0342 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (75 commits)
  pppoe.c: Fix kernel panic caused by __pppoe_xmit
  WAN: Fix a TX IRQ causing BUG() in PC300 and PCI200SYN drivers.
  bnx2x: Advance a version number to 1.60.01-0
  bnx2x: Fixed a compilation warning
  bnx2x: LSO code was broken on BE platforms
  qlge: Fix deadlock when cancelling worker.
  net: fix skb_defer_rx_timestamp()
  cxgb4vf: Ingress Queue Entry Size needs to be 64 bytes
  phy: add the IC+ IP1001 driver
  atm: correct sysfs 'device' link creation and parent relationships
  MAINTAINERS: remove me from tulip
  SCTP: Fix SCTP_SET_PEER_PRIMARY_ADDR to accpet v4mapped address
  enic: Bug Fix: Pass napi reference to the isr that services receive queue
  ipv6: fix nl group when advertising a new link
  connector: add module alias
  net: Document the kernel_recvmsg() function
  r8169: Fix runtime power management
  hso: IP checksuming doesn't work on GE0301 option cards
  xfrm: Fix xfrm_state_migrate leak
  net: Convert netpoll blocking api in bonding driver to be a counter
  ...
2010-12-14 17:33:40 -08:00
Linus Torvalds
3907969596 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI / PM: Do not save/restore NVS on Sony Vaio VGN-NW130D
  ACPI/HEST: adjust section selection
  ACPI: eliminate unused variable warning for !ACPI_SLEEP
  ACPI/PNP: avoid section mismatch warning
  ACPI thermal: remove two unused functions
  ACPI: fix a section mismatch
  ACPI, APEI, use raw spinlock in ERST
  ACPI: video: fix build for CONFIG_ACPI=n
  ACPI: video: fix build for VIDEO_OUTPUT_CONTROL=n
  ACPI: fix allowing to add/remove multiple _OSI strings
  acpi: fix _OSI string setup regression
  ACPI: EC: Add another dmi match entry for MSI hardware
  ACPI battery: update status upon sysfs query
  ACPI ac: update AC status upon sysfs query
  ACPI / PM: Do not refcount power resources that can't be turned on
  ACPI / PM: Check device state before refcounting power resources
2010-12-14 14:33:33 -08:00
Linus Torvalds
f9ae3e125c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: HDA: Quirk for Dell Vostro 320 to make microphone work
  ALSA: hda - Reset sample sizes and max bitrates when reading ELD
  ALSA: hda - Always allow basic audio irrespective of ELD info
  ALSA: hda - Do not wrongly restrict min_channels based on ELD
  ASoC: Correct WM8962 interrupt mask register read
  ASoC: WM8580: Debug BCLK and sample size
  ASoC: Fix resource leak if soc_register_ac97_dai_link failed
  ASoC: Hold client_mutex while calling snd_soc_instantiate_cards()
  ASoC: Fix swap of left and right channels for WM8993/4 speaker boost gain
  ASoC: Fix off by one error in WM8994 EQ register bank size
  ALSA: hda: Use position_fix=1 for Acer Aspire 5538 to enable capture on internal mic
  ALSA: hda - Enable jack sense for Thinkpad Edge 13
  ALSA: hda - Fix ThinkPad T410[s] docking station line-out
  ALSA: hda: Use model=lg quirk for LG P1 Express to enable playback and capture
2010-12-14 13:32:40 -08:00
Linus Torvalds
38971ce2fa Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
  NFS: Fix panic after nfs_umount()
  nfs: remove extraneous and problematic calls to nfs_clear_request
  nfs: kernel should return EPROTONOSUPPORT when not support NFSv4
  NFS: Fix fcntl F_GETLK not reporting some conflicts
  nfs: Discard ACL cache on mode update
  NFS: Readdir cleanups
  NFS: nfs_readdir_search_for_cookie() don't mark as eof if cookie not found
  NFS: Fix a memory leak in nfs_readdir
  Call the filesystem back whenever a page is removed from the page cache
  NFS: Ensure we use the correct cookie in nfs_readdir_xdr_filler
2010-12-14 08:51:12 -08:00
Len Brown
6cc5615f7c Merge branches 'bugzilla-15418', 'bugzilla-21722', 'bugzilla-22932', 'misc-2.6.37' and 'osi-regression' into release 2010-12-11 02:02:02 -05:00
Chris Wilson
b72512ed70 ACPI: video: fix build for CONFIG_ACPI=n
In file included from drivers/gpu/drm/i915/intel_opregion.c:30:
include/acpi/video.h:22: warning: ‘struct acpi_device’ declared inside parameter list
...
include/acpi/video.h:24: error: ‘ENODEV’ undeclared (first use in this function)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-12-11 02:01:46 -05:00
Len Brown
3353bebe7c ACPI: video: fix build for VIDEO_OUTPUT_CONTROL=n
drivers/built-in.o: In function `acpi_video_bus_put_devices':
video.c:(.text+0x79663): undefined reference to
`video_output_unregister'
drivers/built-in.o: In function `acpi_video_bus_add':
video.c:(.text+0x7b0b3): undefined reference to `video_output_register'

Signed-off-by: Len Brown <len.brown@intel.com>
2010-12-11 02:01:35 -05:00
Lin Ming
d90aa92c0c acpi: fix _OSI string setup regression
commit b0ed7a91(ACPICA/ACPI: Add new host interfaces for _OSI suppor)
introduced a regression that _OSI string setup fails.

There are 2 paths to setup _OSI string.

DMI:
acpi_dmi_osi_linux -> set_osi_linux -> acpi_osi_setup -> copy _OSI
string to osi_setup_string

Boot command line:
acpi_osi_setup -> copy _OSI string to osi_setup_string

Later, acpi_osi_setup_late will be called to handle osi_setup_string.
If _OSI string is "Linux" or "!Linux", then the call path is,

acpi_osi_setup_late -> acpi_cmdline_osi_linux -> set_osi_linux ->
acpi_osi_setup -> copy _OSI string to osi_setup_string

This actually never installs _OSI string(acpi_install_interface not
called), but just copy the _OSI string to osi_setup_string.

This patch fixes the regression.

Reported-and-tested-by: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-12-11 01:28:58 -05:00
Dan Williams
d9ca676bcb atm: correct sysfs 'device' link creation and parent relationships
The ATM subsystem was incorrectly creating the 'device' link for ATM
nodes in sysfs.  This led to incorrect device/parent relationships
exposed by sysfs and udev.  Instead of rolling the 'device' link by hand
in the generic ATM code, pass each ATM driver's bus device down to the
sysfs code and let sysfs do this stuff correctly.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-10 15:45:05 -08:00
Takashi Iwai
d70ab7f7ee Merge branch 'fix/asoc' into for-linus 2010-12-09 08:24:32 +01:00
Tom Herbert
67631510a3 tcp: Replace time wait bucket msg by counter
Rather than printing the message to the log, use a mib counter to keep
track of the count of occurences of time wait bucket overflow.  Reduces
spam in logs.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-08 12:16:33 -08:00
Linus Torvalds
6dde39be39 Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/i915: i915 cannot provide switcher services.
  drm/radeon/kms: fix vram base calculation on rs780/rs880
  drm/radeon/kms: fix formatting of vram and gtt info
  drm/radeon/kms: forbid big bo allocation (fdo 31708) v3
  drm: Don't try and disable an encoder that was never enabled
  drm: Add missing drm_vblank_put() along queue vblank error path
  drm/i915/dp: Only apply the workaround if the select is still active
  drm/i915: Emit a request to clear a flushed and idle ring for unbusy bo
  drm/i915/lvds: Always restore panel-fitter when enabling the LVDS
  drm/i915/ringbuffer: Only print an error on the second attempt to reset head
  drm/i915: announce to userspace that the bsd ring is coherent
  agp/intel: Fix wrong kunmap in i830_cleanup()
  drm/i915: Factor in pixel-repeat in FDI M/N calculation
  drm/i915: Death to the unnecessary 64bit divide
  drm/i915: Clean conflicting modesetting registers upon init
  drm/i915: Apply a workaround for transitioning from DP on pipe B to HDMI.
  drm/i915: Always set the DP transcoder config to 8BPC.
2010-12-08 06:34:39 -08:00
Linus Torvalds
f8f5d4f11d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - add new Bamboo PT (0xdb)
  Input: add input driver for polled GPIO buttons
  Input: turbografx - fix reference counting
  Input: synaptics - fix handling of 2-button ClickPads
  Input: wacom - add IDs for two new Bamboo PTs
  Input: document struct input_absinfo
  Input: add keycodes for touchpad on/off keys
  Input: usbtouchscreen - add support for LG Flatron T1710B
2010-12-08 06:34:02 -08:00
Trond Myklebust
2df485a774 nfs: remove extraneous and problematic calls to nfs_clear_request
When a nfs_page is freed, nfs_free_request is called which also calls
nfs_clear_request to clean out the lock and open contexts and free the
pagecache page.

However, a couple of places in the nfs code call nfs_clear_request
themselves. What happens here if the refcount on the request is still high?
We'll be releasing contexts and freeing pointers while the request is
possibly still in use.

Remove those bare calls to nfs_clear_context. That should only be done when
the request is being freed.

Note that when doing this, we need to watch out for tests of req->wb_page.
Previously, nfs_set_page_tag_locked() and nfs_clear_page_tag_locked()
would check the value of req->wb_page to figure out if the page is mapped
into the nfsi->nfs_page_tree. We now indicate the page is mapped using
the new bit PG_MAPPED in req->wb_flags .

Reported-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-07 23:02:44 -05:00
Dave Airlie
e516c7df4c Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel into drm-fixes 2010-12-08 09:30:59 +10:00
Lino Sanfilippo
e9a3854fd4 fanotify: Introduce FAN_NOFD
FAN_NOFD is used in fanotify events that do not provide an open file
descriptor (like the overflow_event).

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-12-07 16:14:23 -05:00
Lino Sanfilippo
09e5f14e57 fanotify: on group destroy allow all waiters to bypass permission check
When fanotify_release() is called, there may still be processes waiting for
access permission. Currently only processes for which an event has already been
queued into the groups access list will be woken up.  Processes for which no
event has been queued will continue to sleep and thus cause a deadlock when
fsnotify_put_group() is called.
Furthermore there is a race allowing further processes to be waiting on the
access wait queue after wake_up (if they arrive before clear_marks_by_group()
is called).
This patch corrects this by setting a flag to inform processes that the group
is about to be destroyed and thus not to wait for access permission.

[additional changelog from eparis]
Lets think about the 4 relevant code paths from the PoV of the
'operator' 'listener' 'responder' and 'closer'.  Where operator is the
process doing an action (like open/read) which could require permission.
Listener is the task (or in this case thread) slated with reading from
the fanotify file descriptor.  The 'responder' is the thread responsible
for responding to access requests.  'Closer' is the thread attempting to
close the fanotify file descriptor.

The 'operator' is going to end up in:
fanotify_handle_event()
  get_response_from_access()
    (THIS BLOCKS WAITING ON USERSPACE)

The 'listener' interesting code path
fanotify_read()
  copy_event_to_user()
    prepare_for_access_response()
      (THIS CREATES AN fanotify_response_event)

The 'responder' code path:
fanotify_write()
  process_access_response()
    (REMOVE A fanotify_response_event, SET RESPONSE, WAKE UP 'operator')

The 'closer':
fanotify_release()
  (SUPPOSED TO CLEAN UP THE REST OF THIS MESS)

What we have today is that in the closer we remove all of the
fanotify_response_events and set a bit so no more response events are
ever created in prepare_for_access_response().

The bug is that we never wake all of the operators up and tell them to
move along.  You fix that in fanotify_get_response_from_access().  You
also fix other operators which haven't gotten there yet.  So I agree
that's a good fix.
[/additional changelog from eparis]

[remove additional changes to minimize patch size]
[move initialization so it was inside CONFIG_FANOTIFY_PERMISSION]

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-12-07 16:14:22 -05:00
Lino Sanfilippo
b1085ba80c fanotify: if set by user unset FMODE_NONOTIFY before fsnotify_perm() is called
Unsetting FMODE_NONOTIFY in fsnotify_open() is too late, since fsnotify_perm()
is called before. If FMODE_NONOTIFY is set fsnotify_perm() will skip permission
checks, so a user can still disable permission checks by setting this flag
in an open() call.
This patch corrects this by unsetting the flag before fsnotify_perm is called.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-12-07 16:14:21 -05:00
Eric Paris
88d60c3276 fanotify: remove packed from access response message
Since fanotify has decided to be careful about alignment and packing
rather than rely on __attribute__((packed)) for multiarch support.
Since this attribute isn't doing anything on fanotify_response we just
drop it.  This does not break API/ABI.

Suggested-by: Tvrtko Ursulin <tvrtko.ursulin@sophos.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2010-12-07 16:14:20 -05:00
Gabor Juhos
0e7d0c860a Input: add input driver for polled GPIO buttons
The existing gpio-keys driver can be usable only for GPIO lines with
interrupt support. Several devices have buttons connected to a GPIO
line which is not capable to generate interrupts. This patch adds a
new input driver using the generic GPIO layer and the input-polldev
to support such buttons.

[Ben Gardiner <bengardiner@nanometrics.ca: fold code to use more
 of the original gpio_keys infrastructure; cleanups and other
 improvements.]

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Tested-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2010-12-06 17:15:15 -08:00
Linus Torvalds
7787d2c2f4 Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Hibernate: Fix memory corruption related to swap
  PM / Hibernate: Use async I/O when reading compressed hibernation image
2010-12-06 15:51:14 -08:00
Rafael J. Wysocki
c9e664f1fd PM / Hibernate: Fix memory corruption related to swap
There is a problem that swap pages allocated before the creation of
a hibernation image can be released and used for storing the contents
of different memory pages while the image is being saved.  Since the
kernel stored in the image doesn't know of that, it causes memory
corruption to occur after resume from hibernation, especially on
systems with relatively small RAM that need to swap often.

This issue can be addressed by keeping the GFP_IOFS bits clear
in gfp_allowed_mask during the entire hibernation, including the
saving of the image, until the system is finally turned off or
the hibernation is aborted.  Unfortunately, for this purpose
it's necessary to rework the way in which the hibernate and
suspend code manipulates gfp_allowed_mask.

This change is based on an earlier patch from Hugh Dickins.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Ondrej Zary <linux@rainbow-software.org>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: stable@kernel.org
2010-12-06 23:52:08 +01:00
Eric Dumazet
46bcf14f44 filter: fix sk_filter rcu handling
Pavel Emelyanov tried to fix a race between sk_filter_(de|at)tach and
sk_clone() in commit 47e958eac2

Problem is we can have several clones sharing a common sk_filter, and
these clones might want to sk_filter_attach() their own filters at the
same time, and can overwrite old_filter->rcu, corrupting RCU queues.

We can not use filter->rcu without being sure no other thread could do
the same thing.

Switch code to a more conventional ref-counting technique : Do the
atomic decrement immediately and queue one rcu call back when last
reference is released.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-06 09:29:43 -08:00
Uk Kim
3fcc0afbb9 ASoC: Fix off by one error in WM8994 EQ register bank size
Signed-off-by: Uk Kim <w0806.kim@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
2010-12-06 12:43:02 +00:00
Daniel Vetter
bbf0c6b362 drm/i915: announce to userspace that the bsd ring is coherent
Otherwise we can't really fix the abi-braindeadness of forcing
libva to manually wait for rendering when switching rings. Which
in turn makes implementing hw semaphores a pointless exercise
(at least for ironlake).

[Also added the relaxed fencing param to explain the jump in
numbering - relaxed fencing is in -next.]

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2010-12-05 10:40:39 +00:00
Linus Torvalds
11e8896474 Merge branch '2.6.37-rc4-pvhvm-fixes' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm
* '2.6.37-rc4-pvhvm-fixes' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
  xen: unplug the emulated devices at resume time
  xen: fix save/restore for PV on HVM guests with pirq remapping
  xen: resume the pv console for hvm guests too
  xen: fix MSI setup and teardown for PV on HVM guests
  xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
2010-12-03 11:30:57 -08:00
KOSAKI Motohiro
20d6c96b5f mem-hotplug: introduce {un}lock_memory_hotplug()
Presently hwpoison is using lock_system_sleep() to prevent a race with
memory hotplug.  However lock_system_sleep() is a no-op if
CONFIG_HIBERNATION=n.  Therefore we need a new lock.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-02 14:51:15 -08:00
Jeremy Fitzhardinge
64141da587 vmalloc: eagerly clear ptes on vunmap
On stock 2.6.37-rc4, running:

  # mount lilith:/export /mnt/lilith
  # find  /mnt/lilith/ -type f -print0 | xargs -0 file

crashes the machine fairly quickly under Xen.  Often it results in oops
messages, but the couple of times I tried just now, it just hung quietly
and made Xen print some rude messages:

    (XEN) mm.c:2389:d80 Bad type (saw 7400000000000001 != exp
    3000000000000000) for mfn 1d7058 (pfn 18fa7)
    (XEN) mm.c:964:d80 Attempt to create linear p.t. with write perms
    (XEN) mm.c:2389:d80 Bad type (saw 7400000000000010 != exp
    1000000000000000) for mfn 1d2e04 (pfn 1d1fb)
    (XEN) mm.c:2965:d80 Error while pinning mfn 1d2e04

Which means the domain tried to map a pagetable page RW, which would
allow it to map arbitrary memory, so Xen stopped it.  This is because
vm_unmap_ram() left some pages mapped in the vmalloc area after NFS had
finished with them, and those pages got recycled as pagetable pages
while still having these RW aliases.

Removing those mappings immediately removes the Xen-visible aliases, and
so it has no problem with those pages being reused as pagetable pages.
Deferring the TLB flush doesn't upset Xen because it can flush the TLB
itself as needed to maintain its invariants.

When unmapping a region in the vmalloc space, clear the ptes
immediately.  There's no point in deferring this because there's no
amortization benefit.

The TLBs are left dirty, and they are flushed lazily to amortize the
cost of the IPIs.

This specific motivation for this patch is an oops-causing regression
since 2.6.36 when using NFS under Xen, triggered by the NFS client's use
of vm_map_ram() introduced in 56e4ebf877 ("NFS: readdir with vmapped
pages") .  XFS also uses vm_map_ram() and could cause similar problems.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Bryan Schumaker <bjschuma@netapp.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Alex Elder <aelder@sgi.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-02 14:51:15 -08:00
Linus Torvalds
8733cb29d6 Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
* 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  uio: Change mail address of Hans J. Koch
  driver core: prune docs about device_interface
  driver core: the development tree has switched to git
2010-12-02 12:58:36 -08:00
Linus Torvalds
eed5ee1a3a Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  serial: mfd: adjust the baud rate setting
  TTY: open/hangup race fixup
  TTY: don't allow reopen when ldisc is changing
  NET: wan/x25, fix ldisc->open retval
  TTY: ldisc, fix open flag handling
  serial8250: Mark console as CON_ANYTIME
2010-12-02 12:58:16 -08:00
Linus Torvalds
435a5aebf6 Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: fix autosuspend bug in usb-serial
  USB: ehci: disable LPM and PPCD for nVidia MCP89 chips
  USB: serial: ftdi_sio: Vardaan USB RS422/485 converter PID added
  USB: yurex: add .llseek fop to file_operations
  USB: ftdi_sio: Add ID for RT Systems USB-29B radio cable
  usb: musb: do not use dma for control transfers
  usb: musb: gadget: fix compilation warning
  usb: musb: clear RXCSR_AUTOCLEAR before PIO read
  usb: musb: unmap dma buffer when switching to PIO
  xhci: Don't let the USB core disable SuperSpeed ports.
  xhci: Setup array of USB 2.0 and USB 3.0 ports.
  xhci: Fix reset-device and configure-endpoint commands
2010-12-02 12:57:35 -08:00
Linus Torvalds
53f517a1f6 Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] v4l: Remove module_name argument to the v4l2_i2c_new_subdev* functions
  [media] v4l: Remove hardcoded module names passed to v4l2_i2c_new_subdev* (2)
2010-12-02 08:05:56 -08:00
Trond Myklebust
11de3b11e0 NFS: Fix a memory leak in nfs_readdir
We need to ensure that the entries in the nfs_cache_array get cleared
when the page is removed from the page cache. To do so, we use the
freepage address_space operation.

Change nfs_readdir_clear_array to use kmap_atomic(), so that the
function can be safely called from all contexts.

Finally, modify the cache_page_release helper to call
nfs_readdir_clear_array directly, when dealing with an anonymous
page from 'uncached_readdir'.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-02 09:58:00 -05:00
Linus Torvalds
6072d13c42 Call the filesystem back whenever a page is removed from the page cache
NFS needs to be able to release objects that are stored in the page
cache once the page itself is no longer visible from the page cache.

This patch adds a callback to the address space operations that allows
filesystems to perform page cleanups once the page has been removed
from the page cache.

Original patch by: Linus Torvalds <torvalds@linux-foundation.org>
[trondmy: cover the cases of invalidate_inode_pages2() and
          truncate_inode_pages()]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-02 09:55:21 -05:00
Stefano Stabellini
af42b8d12f xen: fix MSI setup and teardown for PV on HVM guests
When remapping MSIs into pirqs for PV on HVM guests, qemu is responsible
for doing the actual mapping and unmapping.
We only give qemu the desired pirq number when we ask to do the mapping
the first time, after that we should be reading back the pirq number
from qemu every time we want to re-enable the MSI.

This fixes a bug in xen_hvm_setup_msi_irqs that manifests itself when
trying to enable the same MSI for the second time: the old MSI to pirq
mapping is still valid at this point but xen_hvm_setup_msi_irqs would
try to assign a new pirq anyway.
A simple way to reproduce this bug is to assign an MSI capable network
card to a PV on HVM guest, if the user brings down the corresponding
ethernet interface and up again, Linux would fail to enable MSIs on the
device.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2010-12-02 14:34:25 +00:00
Stefano Stabellini
e5fc734541 xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
Use the new hypercall PHYSDEVOP_get_free_pirq to ask Xen to allocate a
pirq. Remove the unsupported PHYSDEVOP_get_nr_pirqs hypercall to get the
amount of pirq available.

This fixes find_unbound_pirq that otherwise would return a number
starting from nr_irqs that might very well be out of range in Xen.

The symptom of this bug is that when you passthrough an MSI capable pci
device to a PV on HVM guest, Linux would fail to enable MSIs on the
device.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2010-12-02 14:28:22 +00:00
Hans Verkuil
879aa24d63 [media] V4L: improve the BKL replacement heuristic
The BKL replacement mutex had some serious performance side-effects on
V4L drivers. It is replaced by a better heuristic that works around the
worst of the side-effects.

Read the v4l2-dev.c comments for the whole sorry story. This is a
temporary measure only until we can convert all v4l drivers to use
unlocked_ioctl.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-12-01 20:10:19 -02:00