Commit Graph

105573 Commits

Author SHA1 Message Date
Linus Torvalds 39f3b1a687 Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging:
  hwmon: (lm93) Add support for LM94
2011-01-18 14:30:00 -08:00
Linus Torvalds 5d7e8af3c5 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (26 commits)
  MIPS: Malta: enable Cirrus FB console
  MIPS: add CONFIG_VIRTUALIZATION for virtio support
  MIPS: Implement __read_mostly
  MIPS: ath79: add common WMAC device for AR913X based boards
  MIPS: ath79: Add initial support for the Atheros AP81 reference board
  MIPS: ath79: add common SPI controller device
  SPI: Add SPI controller driver for the Atheros AR71XX/AR724X/AR913X SoCs
  MIPS: ath79: add common GPIO buttons device
  MIPS: ath79: add common watchdog device
  MIPS: ath79: add common GPIO LEDs device
  MIPS: ath79: add initial support for the Atheros PB44 reference board
  MIPS: ath79: utilize the MIPS multi-machine support
  MIPS: ath79: add GPIOLIB support
  MIPS: Add initial support for the Atheros AR71XX/AR724X/AR931X SoCs
  MIPS: jump label: Add MIPS support.
  MIPS: Use WARN() in uasm for better diagnostics.
  MIPS: Optimize TLB handlers for Octeon CPUs
  MIPS: Add LDX and LWX instructions to uasm.
  MIPS: Use BBIT instructions in TLB handlers
  MIPS: Declare uasm bbit0 and bbit1 functions.
  ...
2011-01-18 14:28:48 -08:00
Guenter Roeck c7bf71c517 hwmon: (lm93) Add support for LM94
This patch adds basic support for LM94 to the LM93 driver. LM94 specific
sensors and features are not supported.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
2011-01-18 12:22:54 -08:00
Gabor Juhos 8efaef4dc8 SPI: Add SPI controller driver for the Atheros AR71XX/AR724X/AR913X SoCs
The Atheros AR71XX/AR724X/AR913X SoCs have a built-in SPI controller. This
patch implements a driver for that.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: spi-devel-general@lists.sourceforge.net
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-mips@linux-mips.org
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: Cliff Holden <Cliff.Holden@Atheros.com>
Cc: Kathy Giori <Kathy.Giori@Atheros.com>
Patchwork: https://patchwork.linux-mips.org/patch/1960/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-01-18 19:30:27 +01:00
Andres Salomon e6f597a142 staging: fix build failure in bcm driver
While building latest Linus git, I hit the following:

    CC [M]  drivers/staging/bcm/Qos.o
  drivers/staging/bcm/Qos.c: In function ‘PruneQueue’:
  drivers/staging/bcm/Qos.c:367: error: ‘struct netdev_queue’ has no member named ‘tx_dropped’
  drivers/staging/bcm/Qos.c: In function ‘flush_all_queues’:
  drivers/staging/bcm/Qos.c:416: error: ‘struct netdev_queue’ has no member named ‘tx_dropped’
  make[5]: *** [drivers/staging/bcm/Qos.o] Error 1
  make[4]: *** [drivers/staging/bcm] Error 2
  make[3]: *** [drivers/staging] Error 2

As well as:

    CC [M]  drivers/staging/bcm/Transmit.o
  drivers/staging/bcm/Transmit.c: In function ‘SetupNextSend’:
  drivers/staging/bcm/Transmit.c:163: error: ‘struct netdev_queue’ has no member named ‘tx_bytes’
  drivers/staging/bcm/Transmit.c:164: error: ‘struct netdev_queue’ has no member named ‘tx_packets’
  make[2]: *** [drivers/staging/bcm/Transmit.o] Error 1

tx_dropped/tx_bytes_tx_packets were removed in commit 1ac9ad13.  This patch
converts bcm to use net_device_stats instead of netdev_queue.

Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-17 17:39:39 -08:00
Linus Torvalds 6845a44a31 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA: Update workqueue usage
  RDMA/nes: Fix incorrect SFP+ link status detection on driver init
  RDMA/nes: Fix SFP+ link down detection issue with switch port disable
  RDMA/nes: Generate IB_EVENT_PORT_ERR/PORT_ACTIVE events
  RDMA/nes: Fix bonding on iw_nes
  IB/srp: Test only once whether iu allocation succeeded
  IB/mlx4: Handle protocol field in multicast table
  RDMA: Use vzalloc() to replace vmalloc()+memset(0)
  mlx4_{core, ib, en}: Fix driver when sizeof (phys_addr_t) > sizeof (long)
  IB/mthca: Fix driver when sizeof (phys_addr_t) > sizeof (long)
2011-01-17 14:45:48 -08:00
Linus Torvalds 8c34482c17 Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
  spi/spi_sh_msiof: fix a wrong free_irq() parameter
  dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch()
2011-01-17 11:18:40 -08:00
Linus Torvalds ab2020f2f1 Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (59 commits)
  mtd: mtdpart: disallow reading OOB past the end of the partition
  mtd: pxa3xx_nand: NULL dereference in pxa3xx_nand_probe
  UBI: use mtd->writebufsize to set minimal I/O unit size
  mtd: initialize writebufsize in the MTD object of a partition
  mtd: onenand: add mtd->writebufsize initialization
  mtd: nand: add mtd->writebufsize initialization
  mtd: cfi: add writebufsize initialization
  mtd: add writebufsize field to mtd_info struct
  mtd: OneNAND: OMAP2/3: prevent regulator sleeping while OneNAND is in use
  mtd: OneNAND: add enable / disable methods to onenand_chip
  mtd: m25p80: Fix JEDEC ID for AT26DF321
  mtd: txx9ndfmc: limit transfer bytes to 512 (ECC provides 6 bytes max)
  mtd: cfi_cmdset_0002: add support for Samsung K8D3x16UxC NOR chips
  mtd: cfi_cmdset_0002: add support for Samsung K8D6x16UxM NOR chips
  mtd: nand: ams-delta: drop omap_read/write, use ioremap
  mtd: m25p80: add debugging trace in sst_write
  mtd: nand: ams-delta: select for built-in by default
  mtd: OneNAND: lighten scary initial bad block messages
  mtd: OneNAND: OMAP2/3: add support for command line partitioning
  mtd: nand: rearrange ONFI revision checking, add ONFI 2.3
  ...

Fix up trivial conflict in drivers/mtd/Kconfig as per DavidW.
2011-01-17 11:15:30 -08:00
Linus Torvalds 235646a486 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  fs: fix address space warnings in ioctl_fiemap()
  aio: check return value of create_workqueue()
  hpfs_setattr error case avoids unlock_kernel
  compat: copy missing fields in compat_statfs64 to user
  compat: update comment of compat statfs syscalls
  compat: remove unnecessary assignment in compat_rw_copy_check_uvector()
  fs: FS_POSIX_ACL does not depend on BLOCK
  fs: Remove unlikely() from fget_light()
  fs: Remove unlikely() from fput_light()
  fallocate should be a file operation
  make the feature checks in ->fallocate future proof
  staging: smbfs building fix
  tidy up around finish_automount()
  don't drop newmnt on error in do_add_mount()
  Take the completion of automount into new helper
2011-01-17 11:00:09 -08:00
Linus Torvalds 584ef2cd70 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/radeon/kms: balance asic_reset functions
  drm/radeon/kms: remove duplicate card_posted() functions
  drm/radeon/kms: add module option for pcie gen2
  drm/radeon/kms: fix typo in evergreen safe reg
  drm/nouveau: fix gpu page faults triggered by plymouthd
  drm/nouveau: greatly simplify mm, killing some bugs in the process
  drm/nvc0: enable protection of system-use-only structures in vm
  drm/nv40: initialise 0x17xx on all chipsets that have it
  drm/nv40: make detection of 0x4097-ful chipsets available everywhere
2011-01-17 10:57:59 -08:00
Linus Torvalds e1288cd72f Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (63 commits)
  ARM: PL08x: cleanup comments
  Update CONFIG_MD_RAID6_PQ to CONFIG_RAID6_PQ in drivers/dma/iop-adma.c
  ARM: PL08x: fix a warning
  Fix dmaengine_submit() return type
  dmaengine: at_hdmac: fix race while monitoring channel status
  dmaengine: at_hdmac: flags located in first descriptor
  dmaengine: at_hdmac: use subsys_initcall instead of module_init
  dmaengine: at_hdmac: no need set ACK in new descriptor
  dmaengine: at_hdmac: trivial add precision to unmapping comment
  dmaengine: at_hdmac: use dma_address to program DMA hardware
  pch_dma: support new device ML7213 IOH
  ARM: PL08x: prevent dma_set_runtime_config() reconfiguring memcpy channels
  ARM: PL08x: allow dma_set_runtime_config() to return errors
  ARM: PL08x: fix locking between prepare function and submit function
  ARM: PL08x: introduce 'phychan_hold' to hold on to physical channels
  ARM: PL08x: put txd's on the pending list in pl08x_tx_submit()
  ARM: PL08x: rename 'desc_list' as 'pend_list'
  ARM: PL08x: implement unmapping of memcpy buffers
  ARM: PL08x: store prep_* flags in async_tx structure
  ARM: PL08x: shrink srcbus/dstbus in txd structure
  ...
2011-01-17 10:54:41 -08:00
Guennadi Liakhovetski d95defaca7 spi/spi_sh_msiof: fix a wrong free_irq() parameter
Without this fix reloading of the driver is impossible.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-17 10:17:36 -07:00
Artem Bityutskiy 154bf89f5e mtd: mtdpart: disallow reading OOB past the end of the partition
This patch fixes the mtdpart bug which allows users reading OOB past the
end of the partition. This happens because 'part_read_oob()' allows reading
multiple OOB areas in one go, and mtdparts does not validate the OOB
length in the request.

Although there is such check in 'nand_do_read_oob()' in nand_base.c, but
it checks that we do not read past the flash chip, not the partition,
because in nand_base.c we work with the whole chip (e.g., mtd->size
in nand_base.c is the size of the whole chip). So this check cannot
be done correctly in nand_base.c and should be instead done in mtdparts.c.

This problem was reported by Jason Liu <r64343@freescale.com> and reproduced
with nandsim:

$ modprobe nandsim first_id_byte=0x20 second_id_byte=0xaa third_id_byte=0x00 \
                   fourth_id_byte=0x15 parts=0x400,0x400
$ modprobe nandsim mtd_oobtest.ko dev=0
$ dmesg
= snip =
mtd_oobtest: attempting to read past end of device
mtd_oobtest: an error is expected...
mtd_oobtest: error: read past end of device
= snip =
mtd_oobtest: finished with 2 errors

Reported-by: Jason Liu <liu.h.jason@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-01-17 15:25:48 +00:00
Yang Ruirui eb745dbccc staging: smbfs building fix
Building error for smbfs:

drivers/staging/smbfs/dir.c:286: error: static declaration of 'smbfs_dentry_operations' follows non-static declaration
drivers/staging/smbfs/proto.h:42: error: previous declaration of 'smbfs_dentry_operations' was here
drivers/staging/smbfs/dir.c:294: error: static declaration of 'smbfs_dentry_operations_case' follows non-static declaration
drivers/staging/smbfs/proto.h:41: error: previous declaration of 'smbfs_dentry_operations_case' was here
make[3]: *** [drivers/staging/smbfs/dir.o] Error 1
make[2]: *** [drivers/staging/smbfs] Error 2
make[1]: *** [drivers/staging] Error 2
make[1]: *** Waiting for unfinished jobs....

Fix it by removing static keywords

Signed-off-by: Yang Ruirui <ruirui.r.yang@tieto.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-17 01:50:52 -05:00
Roland Dreier 4790f4dc5f Merge branches 'misc', 'mlx4', 'mthca', 'nes' and 'srp' into for-next 2011-01-16 21:22:41 -08:00
Tejun Heo f06267104d RDMA: Update workqueue usage
* ib_wq is added, which is used as the common workqueue for infiniband
  instead of the system workqueue.  All system workqueue usages
  including flush_scheduled_work() callers are converted to use and
  flush ib_wq.

* cancel_delayed_work() + flush_scheduled_work() converted to
  cancel_delayed_work_sync().

* qib_wq is removed and ib_wq is used instead.

This is to prepare for deprecation of flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 21:16:31 -08:00
Alex Deucher 25b2ec5b64 drm/radeon/kms: balance asic_reset functions
First, we were calling mc_stop() at the top of the function
which turns off all MC (memory controller) clients,
then checking if the GPU is idle.  If it was idle we
returned without re-enabling the MC clients which would
lead to a blank screen, etc.  This patch checks if the
GPU is idle before calling mc_stop().

Second, if the reset failed, we were returning without
re-enabling the MC clients.  This patch re-enables
the MC clients before returning regardless of whether
the reset was successful or not.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-01-17 12:21:57 +10:00
Alex Deucher fd909c3718 drm/radeon/kms: remove duplicate card_posted() functions
Use the common one for all asics.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-01-17 12:21:38 +10:00
Alex Deucher d42dd579ac drm/radeon/kms: add module option for pcie gen2
Switching to pcie gen2 causes problems on some
boards.  Add a module option to turn it on/off.

There are gen2 compatability issues with some
motherboards it seems.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=33027

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-01-17 12:21:34 +10:00
Alex Deucher 394d83c17f drm/radeon/kms: fix typo in evergreen safe reg
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-01-17 12:20:55 +10:00
Dave Airlie 51fda92223 Merge remote branch 'nouveau/drm-nouveau-next' of /ssd/git/drm-nouveau-next into drm-fixes
* 'nouveau/drm-nouveau-next' of /ssd/git/drm-nouveau-next:
  drm/nouveau: fix gpu page faults triggered by plymouthd
  drm/nouveau: greatly simplify mm, killing some bugs in the process
  drm/nvc0: enable protection of system-use-only structures in vm
  drm/nv40: initialise 0x17xx on all chipsets that have it
  drm/nv40: make detection of 0x4097-ful chipsets available everywhere
2011-01-17 12:20:31 +10:00
Ben Skeggs f01a9720cb drm/nouveau: fix gpu page faults triggered by plymouthd
The switch to separate BAR and channel address spaces made the fbcon memory
address calculation incorrect on NV50+ boards, this commit fixes that.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-01-17 11:28:59 +10:00
Ben Skeggs 8b464bfed6 drm/nouveau: greatly simplify mm, killing some bugs in the process
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-01-17 11:28:54 +10:00
Ben Skeggs c906ca0fbf drm/nvc0: enable protection of system-use-only structures in vm
Somehow missed this in the original merge of the nvc0 code.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-01-17 11:28:50 +10:00
Ben Skeggs 1380da4979 drm/nv40: initialise 0x17xx on all chipsets that have it
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-01-17 11:28:43 +10:00
Ben Skeggs c693931d93 drm/nv40: make detection of 0x4097-ful chipsets available everywhere
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2011-01-17 11:28:31 +10:00
Andrew Morton e78bf5e6cb drivers/nfc/pn544.c: fix min_t warnings
Fix these:

  drivers/nfc/pn544.c: In function 'pn544_read':
  drivers/nfc/pn544.c:356: warning: comparison of distinct pointer types lacks a cast
  drivers/nfc/pn544.c:377: warning: comparison of distinct pointer types lacks a cast
  drivers/nfc/pn544.c: In function 'pn544_write':
  drivers/nfc/pn544.c:463: warning: comparison of distinct pointer types lacks a cast
  drivers/nfc/pn544.c:485: warning: comparison of distinct pointer types lacks a cast

Cc: "Matti J. Aaltonen" <matti.j.aaltonen@nokia.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-16 17:28:21 -08:00
Russell King - ARM Linux 94ae85220a ARM: PL08x: cleanup comments
Cleanup the formatting of comments, remove some which don't make sense
anymore.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[fix conflict with 96a608a4]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-16 16:55:43 -08:00
Linus Torvalds 8a335bc631 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/scsi-post-merge-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/scsi-post-merge-2.6:
  ocfs2: Make OCFS2_FS depend on CONFIGFS_FS
  dlm: Make DLM depend on CONFIGFS_FS
  net: Make NETCONSOLE_DYNAMIC depend on CONFIGFS_FS
  configfs: change depends -> select SYSFS
  [SCSI] sd,sr: kill compat SDEV_MEDIA_CHANGE event
  [SCSI] sd: implement sd_check_events()
2011-01-16 15:06:43 -08:00
Maciej Sosnowski 843276ad98 RDMA/nes: Fix incorrect SFP+ link status detection on driver init
During iw_nes initialization the link status for SFP+ PHY is always
detected as "up" regardless of real state (cable either connected or
disconnected).  Add SFP+ PHY specific link status detection to the
iw_nes initialization procedure.  Use link status recheck for
netdev_open to detect delayed state updates.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 13:23:35 -08:00
Maciej Sosnowski 5f61b2c693 RDMA/nes: Fix SFP+ link down detection issue with switch port disable
In case of SFP+ PHY, link status check at interrupt processing can
give false results.  For proper link status change detection a delayed
recheck is needed to give nes registers time to settle.  Add a
periodic link status recheck scheduled at interrupt to detect
potential delayed registers state changes.

Addresses: http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2117
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 13:23:34 -08:00
Maciej Sosnowski ea623455b7 RDMA/nes: Generate IB_EVENT_PORT_ERR/PORT_ACTIVE events
Depending on link state change, IB_EVENT_PORT_ERR or
IB_EVENT_PORT_ACTIVE should be generated when handling MAC interrupts.

Plugging in a cable happens to result in series of interrupts changing
driver's link state a number of times before finally staying at link
up (e.g. link up, link down, link up, link down, ..., link up).  To
prevent sending series of redundant IB_EVENT_PORT_ACTIVE and
IB_EVENT_PORT_ERR events, we use a timer to debounce them in
nes_port_ibevent().

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 13:23:34 -08:00
Maciej Sosnowski 2a4c97ead4 RDMA/nes: Fix bonding on iw_nes
Enable configuring bonds on nes devices by adding missing support for
master net_device to the driver.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2011-01-16 13:23:33 -08:00
Nicholas Bellinger d9f9ab51e5 net: Make NETCONSOLE_DYNAMIC depend on CONFIGFS_FS
This patch fixes the following kconfig error after changing
CONFIGFS_FS -> select SYSFS:

fs/sysfs/Kconfig:1:error: recursive dependency detected!
fs/sysfs/Kconfig:1:	symbol SYSFS is selected by CONFIGFS_FS
fs/configfs/Kconfig:1:	symbol CONFIGFS_FS is selected by NETCONSOLE_DYNAMIC
drivers/net/Kconfig:3390:	symbol NETCONSOLE_DYNAMIC depends on SYSFS

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: James Bottomley <James.Bottomley@suse.de>
2011-01-16 21:22:34 +00:00
Rafael J. Wysocki d3072e6a7e ACPI: Fix boot problem related to APEI with acpi_disabled set
Commit 415e12b237 ("PCI/ACPI: Request _OSC control once for each root
bridge (v3)") put the acpi_hest_init() call in acpi_pci_root_init() into
a wrong place, presumably because the author confused acpi_pci_disabled
with acpi_disabled.  Bring the code ordering in acpi_pci_root_init()
back to sanity.

Additionally, make sure that hest_disable is set when acpi_disabled is
set, which is going to prevent acpi_hest_parse(), that still may be
executed for acpi_disabled=1 through aer_acpi_firmware_first(), from
crashing because of uninitialized hest_tab.

Reported-and-tested-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-16 11:56:26 -08:00
Linus Torvalds f8206b925f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (23 commits)
  sanitize vfsmount refcounting changes
  fix old umount_tree() breakage
  autofs4: Merge the remaining dentry ops tables
  Unexport do_add_mount() and add in follow_automount(), not ->d_automount()
  Allow d_manage() to be used in RCU-walk mode
  Remove a further kludge from __do_follow_link()
  autofs4: Bump version
  autofs4: Add v4 pseudo direct mount support
  autofs4: Fix wait validation
  autofs4: Clean up autofs4_free_ino()
  autofs4: Clean up dentry operations
  autofs4: Clean up inode operations
  autofs4: Remove unused code
  autofs4: Add d_manage() dentry operation
  autofs4: Add d_automount() dentry operation
  Remove the automount through follow_link() kludge code from pathwalk
  CIFS: Use d_automount() rather than abusing follow_link()
  NFS: Use d_automount() rather than abusing follow_link()
  AFS: Use d_automount() rather than abusing follow_link()
  Add an AT_NO_AUTOMOUNT flag to suppress terminal automount
  ...
2011-01-16 11:31:50 -08:00
Al Viro f03c65993b sanitize vfsmount refcounting changes
Instead of splitting refcount between (per-cpu) mnt_count
and (SMP-only) mnt_longrefs, make all references contribute
to mnt_count again and keep track of how many are longterm
ones.

Accounting rules for longterm count:
	* 1 for each fs_struct.root.mnt
	* 1 for each fs_struct.pwd.mnt
	* 1 for having non-NULL ->mnt_ns
	* decrement to 0 happens only under vfsmount lock exclusive

That allows nice common case for mntput() - since we can't drop the
final reference until after mnt_longterm has reached 0 due to the rules
above, mntput() can grab vfsmount lock shared and check mnt_longterm.
If it turns out to be non-zero (which is the common case), we know
that this is not the final mntput() and can just blindly decrement
percpu mnt_count.  Otherwise we grab vfsmount lock exclusive and
do usual decrement-and-check of percpu mnt_count.

For fs_struct.c we have mnt_make_longterm() and mnt_make_shortterm();
namespace.c uses the latter in places where we don't already hold
vfsmount lock exclusive and opencodes a few remaining spots where
we need to manipulate mnt_longterm.

Note that we mostly revert the code outside of fs/namespace.c back
to what we used to have; in particular, normal code doesn't need
to care about two kinds of references, etc.  And we get to keep
the optimization Nick's variant had bought us...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-16 13:47:07 -05:00
Grant Likely 672c54466d dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch()
The physical address is never used by the device tree code when
allocating memory for unflattening.  Change the architecture's alloc
hook to return the virutal address instead.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-15 22:01:58 -07:00
David Howells cc53ce53c8 Add a dentry op to allow processes to be held during pathwalk transit
Add a dentry op (d_manage) to permit a filesystem to hold a process and make it
sleep when it tries to transit away from one of that filesystem's directories
during a pathwalk.  The operation is keyed off a new dentry flag
(DCACHE_MANAGE_TRANSIT).

The filesystem is allowed to be selective about which processes it holds and
which it permits to continue on or prohibits from transiting from each flagged
directory.  This will allow autofs to hold up client processes whilst letting
its userspace daemon through to maintain the directory or the stuff behind it
or mounted upon it.

The ->d_manage() dentry operation:

	int (*d_manage)(struct path *path, bool mounting_here);

takes a pointer to the directory about to be transited away from and a flag
indicating whether the transit is undertaken by do_add_mount() or
do_move_mount() skipping through a pile of filesystems mounted on a mountpoint.

It should return 0 if successful and to let the process continue on its way;
-EISDIR to prohibit the caller from skipping to overmounted filesystems or
automounting, and to use this directory; or some other error code to return to
the user.

->d_manage() is called with namespace_sem writelocked if mounting_here is true
and no other locks held, so it may sleep.  However, if mounting_here is true,
it may not initiate or wait for a mount or unmount upon the parameter
directory, even if the act is actually performed by userspace.

Within fs/namei.c, follow_managed() is extended to check with d_manage() first
on each managed directory, before transiting away from it or attempting to
automount upon it.

follow_down() is renamed follow_down_one() and should only be used where the
filesystem deliberately intends to avoid management steps (e.g. autofs).

A new follow_down() is added that incorporates the loop done by all other
callers of follow_down() (do_add/move_mount(), autofs and NFSD; whilst AFS, NFS
and CIFS do use it, their use is removed by converting them to use
d_automount()).  The new follow_down() calls d_manage() as appropriate.  It
also takes an extra parameter to indicate if it is being called from mount code
(with namespace_sem writelocked) which it passes to d_manage().  follow_down()
ignores automount points so that it can be used to mount on them.

__follow_mount_rcu() is made to abort rcu-walk mode if it hits a directory with
DCACHE_MANAGE_TRANSIT set on the basis that we're probably going to have to
sleep.  It would be possible to enter d_manage() in rcu-walk mode too, and have
that determine whether to abort or not itself.  That would allow the autofs
daemon to continue on in rcu-walk mode.

Note that DCACHE_MANAGE_TRANSIT on a directory should be cleared when it isn't
required as every tranist from that directory will cause d_manage() to be
invoked.  It can always be set again when necessary.

==========================
WHAT THIS MEANS FOR AUTOFS
==========================

Autofs currently uses the lookup() inode op and the d_revalidate() dentry op to
trigger the automounting of indirect mounts, and both of these can be called
with i_mutex held.

autofs knows that the i_mutex will be held by the caller in lookup(), and so
can drop it before invoking the daemon - but this isn't so for d_revalidate(),
since the lock is only held on _some_ of the code paths that call it.  This
means that autofs can't risk dropping i_mutex from its d_revalidate() function
before it calls the daemon.

The bug could manifest itself as, for example, a process that's trying to
validate an automount dentry that gets made to wait because that dentry is
expired and needs cleaning up:

	mkdir         S ffffffff8014e05a     0 32580  24956
	Call Trace:
	 [<ffffffff885371fd>] :autofs4:autofs4_wait+0x674/0x897
	 [<ffffffff80127f7d>] avc_has_perm+0x46/0x58
	 [<ffffffff8009fdcf>] autoremove_wake_function+0x0/0x2e
	 [<ffffffff88537be6>] :autofs4:autofs4_expire_wait+0x41/0x6b
	 [<ffffffff88535cfc>] :autofs4:autofs4_revalidate+0x91/0x149
	 [<ffffffff80036d96>] __lookup_hash+0xa0/0x12f
	 [<ffffffff80057a2f>] lookup_create+0x46/0x80
	 [<ffffffff800e6e31>] sys_mkdirat+0x56/0xe4

versus the automount daemon which wants to remove that dentry, but can't
because the normal process is holding the i_mutex lock:

	automount     D ffffffff8014e05a     0 32581      1              32561
	Call Trace:
	 [<ffffffff80063c3f>] __mutex_lock_slowpath+0x60/0x9b
	 [<ffffffff8000ccf1>] do_path_lookup+0x2ca/0x2f1
	 [<ffffffff80063c89>] .text.lock.mutex+0xf/0x14
	 [<ffffffff800e6d55>] do_rmdir+0x77/0xde
	 [<ffffffff8005d229>] tracesys+0x71/0xe0
	 [<ffffffff8005d28d>] tracesys+0xd5/0xe0

which means that the system is deadlocked.

This patch allows autofs to hold up normal processes whilst the daemon goes
ahead and does things to the dentry tree behind the automouter point without
risking a deadlock as almost no locks are held in d_manage() and none in
d_automount().

Signed-off-by: David Howells <dhowells@redhat.com>
Was-Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-15 20:07:31 -05:00
Linus Torvalds f9ee7f60d6 Merge branches 'core-fixes-for-linus', 'x86-fixes-for-linus', 'timers-fixes-for-linus' and 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  rcu: avoid pointless blocked-task warnings
  rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status
  rtmutex: Fix comment about why new_owner can be NULL in wake_futex_pi()

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, olpc: Add missing Kconfig dependencies
  x86, mrst: Set correct APB timer IRQ affinity for secondary cpu
  x86: tsc: Fix calibration refinement conditionals to avoid divide by zero
  x86, ia64, acpi: Clean up x86-ism in drivers/acpi/numa.c

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  timekeeping: Make local variables static
  time: Rename misnamed minsec argument of clocks_calc_mult_shift()

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Remove syscall_exit_fields
  tracing: Only process module tracepoints once
  perf record: Add "nodelay" mode, disabled by default
  perf sched: Fix list of events, dropping unsupported ':r' modifier
  Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"
  perf top: Fix annotate segv
  perf evsel: Fix order of event list deletion
2011-01-15 12:45:00 -08:00
Linus Torvalds 16c1020362 Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (161 commits)
  ARM: pxa: fix building issue of missing physmap.h
  ARM: mmp: PXA910 drive strength FAST using wrong value
  ARM: mmp: MMP2 drive strength FAST using wrong value
  ARM: pxa: fix recursive calls in pxa_low_gpio_chip
  AT91: Support for gsia18s board
  AT91: Acme Systems FOX Board G20 board files
  AT91: board-sam9m10g45ek.c: Remove duplicate inclusion of mach/hardware.h
  ARM: pxa: fix suspend/resume array index miscalculation
  ARM: pxa: use cpu_has_ipr() consistently in irq.c
  ARM: pxa: remove unused variable in clock-pxa3xx.c
  ARM: pxa: fix warning in zeus.c
  ARM: sa1111: fix typo in sa1111_retrigger_lowirq()
  ARM mxs: clkdev related compile fixes
  ARM i.MX mx31_3ds: Fix MC13783 regulator names
  ARM: plat-stmp3xxx: irq_data conversion.
  ARM: plat-spear: irq_data conversion.
  ARM: plat-orion: irq_data conversion.
  ARM: plat-omap: irq_data conversion.
  ARM: plat-nomadik: irq_data conversion.
  ARM: plat-mxc: irq_data conversion.
  ...

Fix up trivial conflict in arch/arm/plat-omap/gpio.c (Lennert
Buytenhek's irq_data conversion clashing with some omap irq updates)
2011-01-15 12:33:40 -08:00
Linus Torvalds 65e5d002b5 Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm:
  ARM: fix missing branch in __error_a
  ARM: fix /proc/$PID/stack on SMP
  ARM: Fix build regression on SA11x0, PXA, and H720x targets
  ARM: 6625/1: use memblock memory regions for "System RAM" I/O resources
  ARM: fix wrongly patched constants
  ARM: 6624/1: fix dependency for CONFIG_SMP_ON_UP
  ARM: 6623/1: Thumb-2: Fix out-of-range offset for Thumb-2 in proc-v7.S
  ARM: 6622/1: fix dma_unmap_sg() documentation
  ARM: 6621/1: bitops: remove condition code clobber for CLZ
  ARM: 6620/1: Change misleading warning when CONFIG_CMDLINE_FORCE is used
  ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU
  ARM: sched_clock: make minsec argument to clocks_calc_mult_shift() zero
  ARM: sched_clock: allow init_sched_clock() to be called early
  ARM: integrator: fix compile warning in cpu.c
  ARM: 6616/1: Fix ep93xx-fb init/exit annotations
  ARM: twd: fix display of twd frequency
  ARM: udelay: prevent math rounding resulting in short udelays
2011-01-15 12:29:50 -08:00
Russell King bbba756069 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable 2011-01-15 13:24:02 +00:00
Wei Yongquan 0261f74163 Update CONFIG_MD_RAID6_PQ to CONFIG_RAID6_PQ in drivers/dma/iop-adma.c
Commit f5e70d0fe3 renamed MD_RAID6_PQ to RAID6_PQ,
but iop-adma.c didn't update synchronously.

Signed-off-by: Wei Yongquan <weiyqlq@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 17:58:12 -08:00
Nicolas Ferre dda36f9821 dmaengine: at_hdmac: fix race while monitoring channel status
We were reading channel status then taking a lock. This lead to a race because
this lock may delay us and then make this channel not idle anymore.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 16:54:44 -08:00
Nicolas Ferre 568f7f0c2e dmaengine: at_hdmac: flags located in first descriptor
Place flags on first descriptor of chain instead of last.
This is the one used by atc_chain_complete() function while unmapping.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 16:54:44 -08:00
Eric Xu 93d0bec2be dmaengine: at_hdmac: use subsys_initcall instead of module_init
Use subsys_initcall instead of module_init in order to keep DMA engine rolling
before other peripheral drivers.

Signed-off-by: Eric Xu <hong.xu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 16:54:43 -08:00
Nicolas Ferre 58344f25cf dmaengine: at_hdmac: no need set ACK in new descriptor
Following descriptor flow in at_hdmac driver, descriptor comming from
atc_desc_get() as already DMA_CTRL_ACK flag set. No need to set it again.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 16:54:43 -08:00
Nicolas Ferre ebcf9b80f9 dmaengine: at_hdmac: trivial add precision to unmapping comment
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-01-14 16:54:43 -08:00
Linus Torvalds 38567333a6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6:
  [SCSI] target: Add LIO target core v4.0.0-rc6
  [SCSI] sd,sr: kill compat SDEV_MEDIA_CHANGE event
  [SCSI] sd: implement sd_check_events()
2011-01-14 16:29:49 -08:00