commit 2ca1af9aa3285c6a5f103ed31ad09f7399fc65d7 "PCI: MSI: Remove
unsafe and unnecessary hardware access" changed read_msi_msg_desc() to
return the last MSI message written instead of reading it from the
device, since it may be called while the device is in a reduced
power state.

However, the pSeries platform code really does need to read messages
from the device, since they are initially written by firmware.
Therefore:
- Restore the previous behaviour of read_msi_msg_desc()
- Add new functions get_cached_msi_msg{,_desc}() which return the
  last MSI message written
- Use the new functions where appropriate
Acked-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

This patch exports SMBIOS provided firmware instance and label of
onboard PCI devices to sysfs.  New files are:
  /sys/bus/pci/devices/.../label which contains the firmware name for
the device in question, and
  /sys/bus/pci/devices/.../index which contains the firmware device type
instance for the given device.
Signed-off-by: NJordan Hargrave <jordan_hargrave@dell.com>
Signed-off-by: NNarendra K <narendra_k@dell.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

PCI sysfs resource files currently only allow mmap'ing.  On x86 this
works fine for memory backed BARs, but doesn't work at all for I/O
port backed BARs.  Add read/write to I/O port PCI sysfs resource
files to allow userspace access to these device regions.
Acked-by: NChris Wright <chrisw@redhat.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

This DMI quirk turns on "pci=use_crs" for the ALiveSATA2-GLAN because
amd_bus.c doesn't handle this system correctly.

The system has a single HyperTransport I/O chain, but has two PCI host
bridges to buses 00 and 80.  amd_bus.c learns the MMIO range associated
with buses 00-ff and that this range is routed to the HT chain hosted at
node 0, link 0:

    bus: [00, ff] on node 0 link 0
    bus: 00 index 1 [mem 0x80000000-0xfcffffffff]

This includes the address space for both bus 00 and bus 80, and amd_bus.c
assumes it's all routed to bus 00.

We find device 80:01.0, which BIOS left in the middle of that space, but
we don't find a bridge from bus 00 to bus 80, so we conclude that 80:01.0
is unreachable from bus 00, and we move it from the original, working,
address to something outside the bus 00 aperture, which does not work:

    pci 0000:80:01.0: reg 10: [mem 0xfebfc000-0xfebfffff 64bit]
    pci 0000:80:01.0: BAR 0: assigned [mem 0xfd00000000-0xfd00003fff 64bit]

The BIOS told us everything we need to know to handle this correctly,
so we're better off if we just pay attention, which lets us leave the
80:01.0 device at the original, working, address:

    ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-7f])
    pci_root PNP0A03:00: host bridge window [mem 0x80000000-0xff37ffff]
    ACPI: PCI Root Bridge [PCI1] (domain 0000 [bus 80-ff])
    pci_root PNP0A08:00: host bridge window [mem 0xfebfc000-0xfebfffff]

This was a regression between 2.6.33 and 2.6.34.  In 2.6.33, amd_bus.c
was used only when we found multiple HT chains.  3e3da00c, which
enabled amd_bus.c even on systems with a single HT chain, caused this
failure.

This quirk was written by Graham.  If we ever enable "pci=use_crs" for
machines from 2006 or earlir, this quirk should be removed.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16007

Cc: stable@kernel.org
Reported-by: NGraham Ramsey <ramsey.graham@ntlworld.com>
Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

In 2.6.34, we transformed the PCI DMA API into the generic device
mode. The PCI DMA API is just the wrapper of the DMA API.

So we don't need HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_SIZE or
HAVE_ARCH_PCI_SET_DMA_SEGMENT_BOUNDARY (which enable architectures to
have the own implementations). Both haven't been used anyway.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

It is a known issue that mmio decoding shall be disabled while doing PCI
bar sizing. Host bridge and other devices (PCI PIC) shall be excluded for
certain platforms. This patch mainly comes from Mathew Willcox's
patch in http://kerneltrap.org/mailarchive/linux-kernel/2007/9/13/258969.

A new flag bit "mmio_alway_on" is added to pci_dev with the intention that
devices with their mmio decoding cannot be disabled during BAR sizing shall
have this bit set, preferrablly in their quirks.

Without this patch, Intel Moorestown platform graphics unit will be
corrupted during bar sizing activities.
Signed-off-by: NJacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

During suspend on an SMP system, {read,write}_msi_msg_desc() may be
called to mask and unmask interrupts on a device that is already in a
reduced power state.  At this point memory-mapped registers including
MSI-X tables are not accessible, and config space may not be fully
functional either.

While a device is in a reduced power state its interrupts are
effectively masked and its MSI(-X) state will be restored when it is
brought back to D0.  Therefore these functions can simply read and
write msi_desc::msg for devices not in D0.

Further, read_msi_msg_desc() should only ever be used to update a
previously written message, so it can always read msi_desc::msg
and never needs to touch the hardware.
Tested-by: N"Michael Chan" <mchan@broadcom.com>
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

The CONFIG_PCIEASPM option is confusing and potentially dangerous. ASPM is
a hardware mediated feature rather than one under direct OS control, and
even if the config option is disabled the system firmware may have turned
on ASPM on various bits of hardware. This can cause problems later -
various hardware that claims to support ASPM does a poor job of it and may
hang or cause other difficulties. The kernel is able to recognise this in
many cases and disable the ASPM functionality, but only if CONFIG_PCIEASPM
is enabled.

Given that in its default configuration this option will either leave the
hardware as it was originally or disable hardware functionality that may
cause problems, it should by default y. The only reason to disable it
ought to be to reduce code size, so make it dependent on CONFIG_EMBEDDED.
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Cc: lrodriguez@atheros.com
Cc: maximlevitsky@gmail.com
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

I encountered the problem that /proc/bus/pci/XX/YY is not removed even
after the corresponding device is hot-removed, if the file is still
being opened. In addtion, accessing this file in this situation causes
kernel panic (see below).

Becasue the pci_proc_detach_device() doesn't call remove_proc_entry()
if struct proc_dir_entry->count > 1, access to /proc/bus/pci/XX/YY
would refer to struct pci_dev that was already freed.

Though I don't know why the check for proc_dir_entry->count was added,
I don't think it is needed. Removing this check fixes the problem.

Steps to reproduce
------------------
# cd /sys/bus/pci/slots/2/
# PROC_BUS_PCI_FILE=/proc/bus/pci/`awk -F: '{print $2"/"$3}' < address`.0
# sleep 10000 < $PROC_BUS_PCI_FILE &
# echo 0 > power
# while true; do cat $PROC_BUS_PCI_FILE > /dev/null; done

Oops Messages
-------------
BUG: unable to handle kernel NULL pointer dereference at 00000042
IP: [<c05c82d5>] pci_user_read_config_dword+0x65/0xa0
*pdpt = 000000002185e001 *pde = 0000000476a79067
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:1c.0/0000:10:00.0/local_cpus
Modules linked in: autofs4 sunrpc cpufreq_ondemand acpi_cpufreq ipv6 dm_mirror dm_region_hash dm_log dm_mod e1000e i2c_i801 i2c_core iTCO_wdt igb sg pcspkr dca iTCO_vendor_support ext4 mbcache jbd2 sd_mod crc_t10dif lpfc mptsas scsi_transport_fc mptscsih mptbase scsi_tgt scsi_transport_sas [last unloaded: microcode]

Pid: 2997, comm: cat Not tainted 2.6.34-kk #32 SB/PRIMEQUEST 1800E
EIP: 0060:[<c05c82d5>] EFLAGS: 00010046 CPU: 19
EIP is at pci_user_read_config_dword+0x65/0xa0
EAX: 00000002 EBX: e44f1800 ECX: e144df14 EDX: 155668c7
ESI: 00000087 EDI: 00000000 EBP: e144df40 ESP: e144df0c
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process cat (pid: 2997, ti=e144c000 task=e26f2570 task.ti=e144c000)
Stack:
 c09ceac0 c0570f72 ffffffff 08c57000 00000000 00001000 e44f1800 c05d2404
<0> e144df40 00001000 00000000 00001000 08c57000 3093ae50 e420cb40 e358d5c0
<0> c05d2300 fffffffb c054984f e144df9c 00008000 08c57000 e358d5c0 00008000
Call Trace:
 [<c0570f72>] ? security_capable+0x22/0x30
 [<c05d2404>] ? proc_bus_pci_read+0x104/0x220
 [<c05d2300>] ? proc_bus_pci_read+0x0/0x220
 [<c054984f>] ? proc_reg_read+0x5f/0x90
 [<c05497f0>] ? proc_reg_read+0x0/0x90
 [<c050694d>] ? vfs_read+0x9d/0x190
 [<c04958f4>] ? audit_syscall_entry+0x204/0x230
 [<c0506a81>] ? sys_read+0x41/0x70
 [<c0402f1f>] ? sysenter_do_call+0x12/0x28
Code: b4 26 00 00 00 00 b8 20 88 b1 c0 c7 44 24 08 ff ff ff ff e8 3e 52 22 00 f6 83 24 04 00 00 20 75 34 8b 43 08 8d 4c 24 08 8b 53 1c <8b> 70 40 89 4c 24 04 89 f9 c7 04 24 04 00 00 00 ff 16 89 c6 f0
EIP: [<c05c82d5>] pci_user_read_config_dword+0x65/0xa0 SS:ESP 0068:e144df0c
CR2: 0000000000000042
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Remove unnesessary casts from void*.
Signed-off-by: NKulikov Vasiliy <segooon@gmail.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

The PCI SIG documentation for the _OSC OS/firmware handshaking interface
states:

"If the _OSC control method is absent from the scope of a host bridge
device, then the operating system must not enable or attempt to use any
features defined in this section for the hierarchy originated by the host
bridge."

The obvious interpretation of this is that the OS should not attempt to use
PCIe hotplug, PME or AER - however, the specification also notes that an
_OSC method is *required* for PCIe hierarchies, and experimental validation
with An Alternative OS indicates that it doesn't use any PCIe functionality
if the _OSC method is missing. That arguably means we shouldn't be using
MSI or extended config space, but right now our problems seem to be limited
to vendors being surprised when ASPM gets enabled on machines when other
OSs refuse to do so. So, for now, let's just disable ASPM if the _OSC
method doesn't exist or refuses to hand over PCIe capability control.
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Found one PCIe Module with several bridges built-in where a "cold"
hotadd doesn't work.

If we end up reassigning bridge windows at hotadd time, and have to loop
through assigning new ranges, we won't end up enabling the child bridges
because the first assignment pass already tried to enable them, which
prevents __pci_bridge_assign_resource from updating the windows.

So try to move enabling of child bridges to the end, and only do it
once.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Removed check to prevent hotplug of display devices within shpchp.
Originally this was thought to have been required within the PCI
Hotplug specification for some legacy devices.  However there is
no such requirement in the most recent revision. The check prevents
hotplug of not only display devices but also computational GPUs
which require serviceability.
Signed-off-by: NPraveen Kalamegham <praveen@nextio.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

pciehp_unconfigure_device() should return -EINVAL, not EINVAL.
Signed-off-by: NPraveen Kalamegham <praveen@nextio.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

The aspm code will currently set the configured aspm policy before drivers
have had an opportunity to indicate that their hardware doesn't support it.
Unfortunately, putting some hardware in L0 or L1 can result in the hardware
no longer responding to any requests, even after aspm is disabled. It makes
more sense to leave aspm policy at the BIOS defaults at initial setup time,
reconfiguring it after pci_enable_device() is called. This allows the
driver to blacklist individual devices beforehand.
Reviewed-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Use resource_size_t for MMIO address instead of unsigned long. Otherwise,
higher 32-bits of MMIO address are cleared unexpectedly in x86-32 PAE.
Acked-by: NMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

pci_enable_device can fail. In that case, a printed warning would be
more appropriate.
Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NJunchang Wang <junchangwang@gmail.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Assigning zero where NULL should be used.
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

The Linux kernel assigns BARs that a BIOS did not assign, most likely
to handle broken BIOSes that didn't enumerate the devices correctly.
On UV the BIOS purposely doesn't assign I/O BARs for certain devices/
drivers we know don't use them (examples, LSI SAS, Qlogic FC, ...).
We purposely don't assign these I/O BARs because I/O Space is a very
limited resource.  There is only 64k of I/O Space, and in a PCIe
topology that space gets divided up into 4k chucks (this is due to
the fact that a pci-to-pci bridge's I/O decoder is aligned at 4k)...
Thus a system can have at most 16 cards with I/O BARs: (64k / 4k = 16)

SGI needs to scale to >16 devices with I/O BARs.  So by not assigning
I/O BARs on devices we know don't use them, we can do that (iff the
kernel doesn't go and assign these BARs that the BIOS purposely didn't
assign).

This patch will not assign a resource to a device BAR if that BAR was
not assigned by the BIOS, and the kernel cmdline option 'pci=nobar'
was specified.   This patch is closely modeled after the 'pci=norom'
option that currently exists in the tree.
Signed-off-by: NMike Habeck <habeck@sgi.com>
Signed-off-by: NMike Travis <travis@sgi.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

MSI delivery from on-board ahci controller doesn't work on K8M800.  At
this point, it's unclear whether the culprit is with the ahci
controller or the host bridge.  Given the track record and considering
the rather minimal impact of MSI, disabling it seems reasonable.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: NRainer Hurtado Navarro <publio.escipion.el.africano@gmail.com>
Cc: stable@kernel.org
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

In all AMD 780 family northbridges, the vendor ID of the internal
graphics PCI/PCI bridge reads not as AMD but as that of the mainboard
vendor, because the hardware actually returns the value of the subsystem
vendor ID (erratum 18).

We currently have additional quirk entries for Asus and Acer, but it is
likely that we will encounter more systems with other vendor IDs.

Since we do not know in advance all possible vendor IDs, a better way to
find the device is to declare the quirk on the host bridge, whose ID is
always correct, and use that device as a stepping stone to find the PCI/
PCI bridge, if present.
Reviewed-by: NMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

The SLOT_REG_RSVDZ_MASK macro is normally used like this:
	slot_reg &= ~SLOT_REG_RSVDZ_MASK;
The ~ operator has higher precedence than the | operator from inside the
macro, so it needs parenthesis.
Reviewed-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

Some compiler generates following warnings:

  In function 'aer_isr':
  warning: 'e_src.id' may be used uninitialized in this function
  warning: 'e_src.status' may be used uninitialized in this function

Avoid status flag "int ret" and return constants instead, so that
gcc sees the return value matching "it is initialized" better.
Acked-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

pcibios_scan_specific_bus calls pci_scan_bus_on_node which is
__devinit. Mark pcibios_scan_specific_bus __devinit as well since
all users are now __init or __devinit.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

This patch (as1388) changes the way the PCI core handles runtime PM
settings when probing or unbinding drivers.  Now the core will make
sure the device is enabled for runtime PM, with a usage count >= 1,
when a driver is probed.  It does the same when calling a driver's
remove method.

If the driver wants to use runtime PM, all it has to do is call
pm_runtime_pu_noidle() near the end of its probe routine (to cancel
the core's usage increment) and pm_runtime_get_noresume() near the
start of its remove routine (to restore the usage count).  It does not
need to mess around with setting the runtime state to enabled,
disabled, active, or suspended.

The patch updates e1000e and r8169, the only PCI drivers that already
use the existing runtime PM interface.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] etr: fix clock synchronization race
  [S390] Fix IRQ tracing in case of PER

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  watchdog: update MAINTAINERS entry

* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Add a PC-beep workaround for ASUS P5-V
  ALSA: hda - Assume PC-beep as default for Realtek
  ALSA: hda - Don't register beep input device when no beep is available
  ALSA: hda - Fix pin-detection of Nvidia HDMI

Fix __task_cred()'s lockdep check by removing the following validation
condition:

	lockdep_tasklist_lock_is_held()

as commit_creds() does not take the tasklist_lock, and nor do most of the
functions that call it, so this check is pointless and it can prevent
detection of the RCU lock not being held if the tasklist_lock is held.

Instead, add the following validation condition:

	task->exit_state >= 0

to permit the access if the target task is dead and therefore unable to change
its own credentials.

Fix __task_cred()'s comment to:

 (1) discard the bit that says that the caller must prevent the target task
     from being deleted.  That shouldn't need saying.

 (2) Add a comment indicating the result of __task_cred() should not be passed
     directly to get_cred(), but rather than get_task_cred() should be used
     instead.

Also put a note into the documentation to enforce this point there too.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NJiri Olsa <jolsa@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

It's possible for get_task_cred() as it currently stands to 'corrupt' a set of
credentials by incrementing their usage count after their replacement by the
task being accessed.

What happens is that get_task_cred() can race with commit_creds():

	TASK_1			TASK_2			RCU_CLEANER
	-->get_task_cred(TASK_2)
	rcu_read_lock()
	__cred = __task_cred(TASK_2)
				-->commit_creds()
				old_cred = TASK_2->real_cred
				TASK_2->real_cred = ...
				put_cred(old_cred)
				  call_rcu(old_cred)
		[__cred->usage == 0]
	get_cred(__cred)
		[__cred->usage == 1]
	rcu_read_unlock()
							-->put_cred_rcu()
							[__cred->usage == 1]
							panic()

However, since a tasks credentials are generally not changed very often, we can
reasonably make use of a loop involving reading the creds pointer and using
atomic_inc_not_zero() to attempt to increment it if it hasn't already hit zero.

If successful, we can safely return the credentials in the knowledge that, even
if the task we're accessing has released them, they haven't gone to the RCU
cleanup code.

We then change task_state() in procfs to use get_task_cred() rather than
calling get_cred() on the result of __task_cred(), as that suffers from the
same problem.

Without this change, a BUG_ON in __put_cred() or in put_cred_rcu() can be
tripped when it is noticed that the usage count is not zero as it ought to be,
for example:

kernel BUG at kernel/cred.c:168!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/kernel/mm/ksm/run
CPU 0
Pid: 2436, comm: master Not tainted 2.6.33.3-85.fc13.x86_64 #1 0HR330/OptiPlex
745
RIP: 0010:[<ffffffff81069881>]  [<ffffffff81069881>] __put_cred+0xc/0x45
RSP: 0018:ffff88019e7e9eb8  EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff880161514480 RCX: 00000000ffffffff
RDX: 00000000ffffffff RSI: ffff880140c690c0 RDI: ffff880140c690c0
RBP: ffff88019e7e9eb8 R08: 00000000000000d0 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000040 R12: ffff880140c690c0
R13: ffff88019e77aea0 R14: 00007fff336b0a5c R15: 0000000000000001
FS:  00007f12f50d97c0(0000) GS:ffff880007400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f461bc000 CR3: 00000001b26ce000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process master (pid: 2436, threadinfo ffff88019e7e8000, task ffff88019e77aea0)
Stack:
 ffff88019e7e9ec8 ffffffff810698cd ffff88019e7e9ef8 ffffffff81069b45
<0> ffff880161514180 ffff880161514480 ffff880161514180 0000000000000000
<0> ffff88019e7e9f28 ffffffff8106aace 0000000000000001 0000000000000246
Call Trace:
 [<ffffffff810698cd>] put_cred+0x13/0x15
 [<ffffffff81069b45>] commit_creds+0x16b/0x175
 [<ffffffff8106aace>] set_current_groups+0x47/0x4e
 [<ffffffff8106ac89>] sys_setgroups+0xf6/0x105
 [<ffffffff81009b02>] system_call_fastpath+0x16/0x1b
Code: 48 8d 71 ff e8 7e 4e 15 00 85 c0 78 0b 8b 75 ec 48 89 df e8 ef 4a 15 00
48 83 c4 18 5b c9 c3 55 8b 07 8b 07 48 89 e5 85 c0 74 04 <0f> 0b eb fe 65 48 8b
04 25 00 cc 00 00 48 3b b8 58 04 00 00 75
RIP  [<ffffffff81069881>] __put_cred+0xc/0x45
 RSP <ffff88019e7e9eb8>
---[ end trace df391256a100ebdd ]---
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NJiri Olsa <jolsa@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add Mailing-list and website to watchdog MAINTAINERS entry.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

ASUS P5-V provides a SSID that unexpectedly matches with the value
compilant with Realtek's specification.  Thus the driver interprets
it badly, resulting in non-working PC beep.

This patch adds a white-list for such a case; a white-list of known
devices with working PC beep.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  x86,kgdb: Fix hw breakpoint regression

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] ibmvscsi: Fix oops when an interrupt is pending during probe
  [SCSI] zfcp: Update status read mempool
  [SCSI] zfcp: Do not wait for SBALs on stopped queue
  [SCSI] zfcp: Fix check whether unchained ct_els is possible
  [SCSI] ipr: fix resource path display and formatting

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
  davinci: da850/omap-l138 evm: account for DEFDCDC{2,3} being tied high
  regulator: tps6507x: allow driver to use DEFDCDC{2,3}_HIGH register
  wm8350-regulator: fix wm8350_register_regulator error handling
  ab3100: fix off-by-one value range checking for voltage selector

The function ecryptfs_uid_hash wrongly assumes that the
second parameter to hash_long() is the number of hash
buckets instead of the number of hash bits.
This patch fixes that and renames the variable
ecryptfs_hash_buckets to ecryptfs_hash_bits to make it
clearer.

Fixes: CVE-2010-2492
Signed-off-by: NAndre Osterhues <aosterhues@escrypt.com>
Signed-off-by: NTyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

HW breakpoints events stopped working correctly with kgdb
as a result of commit: 018cbffe
(Merge commit 'v2.6.33' into perf/core).

The regression occurred because the behavior changed for setting
NOTIFY_STOP as the return value to the die notifier if the breakpoint
was known to the HW breakpoint API.  Because kgdb is using the HW
breakpoint API to register HW breakpoints slots, it must also now
implement the overflow_handler call back else kgdb does not get to see
the events from the die notifier.

The kgdb_ll_trap function will be changed to be general purpose code
which can allow an easy way to implement the hw_breakpoint API
overflow call back.
Signed-off-by: NJason Wessel <jason.wessel@windriver.com>
Acked-by: NDongdong Deng <dongdong.deng@windriver.com>
Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: use complete_all and wake_up_all
  ceph: Correct obvious typo of Kconfig variable "CRYPTO_AES"
  ceph: fix dentry lease release
  ceph: fix leak of dentry in ceph_init_dentry() error path
  ceph: fix pg_mapping leak on pg_temp updates
  ceph: fix d_release dop for snapdir, snapped dentries
  ceph: avoid dcache readdir for snapdir

If we don't need a huge amount of memory in ->readdir() then
we can use kmalloc rather than vmalloc to allocate it. This
should cut down on the greater overheads associated with
vmalloc for smaller directories.

We may be able to eliminate vmalloc entirely at some stage,
but this is easy to do right away.

Also using GFP_NOFS to avoid any issues wrt to deleting inodes
while under a glock, and suggestion from Linus to factor out
the alloc/dealloc.

I've given this a test with a variety of different sized
directories and it seems to work ok.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Enable PC-beep as default for hardwares that aren't compliant with the
SSID value Realtek requires.  In such a case, better to enable the beep
to avoid a regression.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>