openwrt/staging/blogic.git
12 years agoahci: support the STA2X11 I/O Hub
Alessandro Rubini [Fri, 6 Jan 2012 12:33:39 +0000 (13:33 +0100)]
ahci: support the STA2X11 I/O Hub

The AHCI controller found in the STA2X11 chip uses BAR number 0
instead of 5. Also, the chip's fixup code sets a special DMA mask
for all of its PCI functions, and the mask must be preserved here.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agopata_bf54x: fix BMIDE status register emulation
Sergei Shtylyov [Fri, 6 Jan 2012 17:45:45 +0000 (20:45 +0300)]
pata_bf54x: fix BMIDE status register emulation

The author of this driver clearly wasn't familiar with the BMIDE specification
(also known as SFF-8038i) when he implemented the bmdma_status() method: first,
the interrupt bit of the BMIDE status register corresponds to nothing else but
INTRQ signal (ATAPI_DEV_INT here); second, the error bit is only set if the
controller encounters issue doing the bus master transfers, not on the IDE DMA
burst termination interrupts like here (moreover, setting the error bit doesn't
cause an interrupt).  We now need to disable all those unused interrupts...

(The only thing I couldn't figure out is how to flush the FIFO to memory once
the interrupt happens as required by the mentioned spec.)

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoata: add ata port hibernate callbacks
Lin Ming [Thu, 22 Dec 2011 06:50:49 +0000 (14:50 +0800)]
ata: add ata port hibernate callbacks

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoata: update ata port's runtime status during system resume
Lin Ming [Thu, 22 Dec 2011 06:50:48 +0000 (14:50 +0800)]
ata: update ata port's runtime status during system resume

The ata port is brought back to full power state during system resume.
So its runtime PM status will have to be updated to reflect
the actual post-system sleep status.

This also fixes below warning during system suspend/resume.

WARNING: at /work/linux/drivers/ata/libata-eh.c:4034
ata_scsi_port_error_handler+0x89/0x557()

4034         WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED));

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years ago[SCSI] runtime resume parent for child's system-resume
Lin Ming [Thu, 22 Dec 2011 06:50:47 +0000 (14:50 +0800)]
[SCSI] runtime resume parent for child's system-resume

[Patch description from Alan Stern]

If a child device was runtime-suspended when a system suspend began,
then there will be nothing to prevent its parent from
runtime-suspending as soon as it is woken up during the system resume.
Then when the time comes to resume the child, the resume will fail
because the parent is already back at low power.

On the other hand, there are some devices which should remain at low
power across an entire suspend-resume cycle.  The details depend on the
device and the platform.

This suggests that the PM core is not the right place to solve the
problem. One possible solution is for the subsystem or device driver
to call pm_runtime_get_sync(dev->parent) at the start of the
system-resume procedure and pm_runtime_put_sync(dev->parent) at the
end.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoahci: platform support for suspend/resume
Brian Norris [Fri, 18 Nov 2011 19:10:10 +0000 (11:10 -0800)]
ahci: platform support for suspend/resume

Add platform hooks for custom suspend() and resume() functions. The
generic suspend/resume code in drivers/ata/ahci_platform.c is adapted
from the PCI version in drivers/ata/ahci.c.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agolibata-core: kill duplicate statement in ata_do_set_mode()
Sergei Shtylyov [Thu, 22 Dec 2011 19:41:32 +0000 (22:41 +0300)]
libata-core: kill duplicate statement in ata_do_set_mode()

Commit b3a706014e56b1356e7b275fd25b833c63175bf0 (libata: Add a
drivers/ide style DMA disable) neglected to remove the line in
ata_do_set_mode() it has obviously made useless/duplicated.  Do this
now, and make a line added back then wrapped properly...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agopata_of_platform: remove direct dependency on OF_IRQ
Rob Herring [Thu, 22 Dec 2011 20:07:00 +0000 (15:07 -0500)]
pata_of_platform: remove direct dependency on OF_IRQ

CONFIG_OF_IRQ is not available on some platforms and using of_irq_*
breaks the build. Since resources are already populated in the platform
device, get the irq from there instead.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoSATA/PATA: convert drivers/ata/* to use module_platform_driver()
Axel Lin [Sun, 27 Nov 2011 06:44:26 +0000 (14:44 +0800)]
SATA/PATA: convert drivers/ata/* to use module_platform_driver()

This patch converts the drivers in drivers/ata/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Viresh Kumar <viresh.kumar@st.com>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Sylvain Munaut <tnt@246tNt.com>
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Mark Miesfeld <mmiesfeld@amcc.com>
Cc: Ashish Kalra <ashish.kalra@freescale.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agopata_cs5536: forward port changes from cs5536
Bartlomiej Zolnierkiewicz [Thu, 13 Oct 2011 11:05:24 +0000 (13:05 +0200)]
pata_cs5536: forward port changes from cs5536

* Fix cable detection to also account for the slave device cable bit.

* Disable UDMA when programming MWDMA in cs5536_set_dmamode().

* Don't change UDMA settings in cs5536_set_piomode().

* Add cs5536_program_dtc() helper.

* Cleanup and uninline cs5536_[read,write]() methods.

Cc: Martin K. Petersen <mkp@mkp.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agolibata-sff: use ATAPI_{COD|IO}
Sergei Shtylyov [Fri, 2 Dec 2011 15:39:53 +0000 (18:39 +0300)]
libata-sff: use ATAPI_{COD|IO}

atapi_pio_bytes() uses bare numbers for the ATAPI interrupt reason bits despite
these are #define'd in <linux/ata.h>.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoata: add ata port runtime PM callbacks
Lin Ming [Mon, 5 Dec 2011 01:20:28 +0000 (09:20 +0800)]
ata: add ata port runtime PM callbacks

Add ata port runtime suspend/resume/idle callbacks.
Set ->eh_noresume to skip the runtime PM calls on scsi host
in the error handler to avoid dead lock.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoata: add ata port system PM callbacks
Lin Ming [Mon, 5 Dec 2011 01:20:27 +0000 (09:20 +0800)]
ata: add ata port system PM callbacks

Change ata_host_request_pm to ata_port_request_pm which performs
port suspend/resume.

Add ata port type driver which implements port PM callbacks.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years ago[SCSI] sd: check runtime PM status in sd_shutdown
Lin Ming [Mon, 5 Dec 2011 01:20:26 +0000 (09:20 +0800)]
[SCSI] sd: check runtime PM status in sd_shutdown

sd_shutdown is called during reboot/poweroff.
It may fail if parent device, for example, ata port, was runtime suspended.

Fix it by checking runtime PM status of sd.
Exit immediately if sd was runtime suspended already.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years ago[SCSI] check runtime PM status in system PM
Lin Ming [Mon, 5 Dec 2011 01:20:25 +0000 (09:20 +0800)]
[SCSI] check runtime PM status in system PM

The only high-level SCSI driver that currently implements runtime PM is
sd, and sd treats runtime suspend exactly the same as the SUSPEND and
HIBERNATE stages of system sleep, but not the same as the FREEZE stage.

Therefore, when entering the SUSPEND or HIBERNATE stages of system
sleep, we can skip the callback to the driver if the device is already
in runtime suspend.  When entering the FREEZE stage, however, we should
first issue a runtime resume.  The overhead of doing this is
negligible, because a suspended drive would be spun up during the THAW
stage of hibernation anyway.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years ago[SCSI] add flag to skip the runtime PM calls on the host
Lin Ming [Mon, 5 Dec 2011 01:20:24 +0000 (09:20 +0800)]
[SCSI] add flag to skip the runtime PM calls on the host

With previous change, now the ata port runtime suspend will happen as:

disk suspend --> scsi target suspend --> scsi host suspend --> ata port
suspend

ata port(parent device) suspend need to schedule scsi EH which will resume
scsi host(child device). Then the child device resume will in turn make
parent device resume first. This is kind of recursive.

This patch adds a new flag Scsi_Host::eh_noresume.
ata port will set this flag to skip the runtime PM calls on scsi host.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoata: make ata port as parent device of scsi host
Lin Ming [Mon, 5 Dec 2011 01:20:23 +0000 (09:20 +0800)]
ata: make ata port as parent device of scsi host

Currently, the device tree of ata port and scsi host looks as below,

        /sys/devices/pci0000:00/0000:00:1f.2    (ahci controller)
        |-- ata1                                (ata port)
        |-- host0                               (scsi host)
           |-- target0:0:0                      (scsi target)
               |-- 0:0:0:0                      (disk)

This patch makes ata port as parent device of scsi host, then it becomes

        /sys/devices/pci0000:00/0000:00:1f.2    (ahci controller)
        |-- ata1                                (ata port)
            |-- host0                           (scsi host)
                |-- target0:0:0                 (scsi target)
                    |-- 0:0:0:0                 (disk)

With this change, the ata port runtime PM is easier.
For example, the ata port runtime suspend will happen as,

disk suspend --> scsi target suspend --> scsi host suspend --> ata port
suspend.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoahci: start engine only during soft/hard resets
Tejun Heo [Fri, 22 Jul 2011 09:41:26 +0000 (11:41 +0200)]
ahci: start engine only during soft/hard resets

This is another attempt at fixing the same problem that 270dac35c2
(libata: ahci_start_engine compliant to AHCI spec) tried to solve.
Unfortunately, 270dac35c2 created regressions for a lot more common
controllers and got reverted.

This specific AHCI IP block becomes a brick if the DMA engine is
started while DRQ is set.  It is not possible to avoid the condition
completely but the most common occurrence is caused by spurious use of
ahci_start_engine() from ahci_start_port() during init sequence.

DMA engine is started after both soft and hard resets and
ahci_start_port() is always followed by resets, so there is no reason
to start DMA engine from ahci_start_port().

This patch removes ahci_start_engine() invocation from
ahci_start_port().  This change makes failure path of
ahci_port_suspend() leave engine stopped without following resets.
This is resolved by replacing ahci_start_port() call with
ata_port_freeze() which forces resets afterwards, which is the better
behavior anyway.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Brian Norris <computersforpeace@gmail.com>
Reported-by: Jian Peng <jipeng2005@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
12 years agoLinux 3.2
Linus Torvalds [Wed, 4 Jan 2012 23:55:44 +0000 (15:55 -0800)]
Linux 3.2

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Wed, 4 Jan 2012 23:03:49 +0000 (15:03 -0800)]
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  fix CAN MAINTAINERS SCM tree type
  mwifiex: fix crash during simultaneous scan and connect
  b43: fix regression in PIO case
  ath9k: Fix kernel panic in AR2427 in AP mode
  CAN MAINTAINERS update
  net: fsl: fec: fix build for mx23-only kernel
  sch_qfq: fix overflow in qfq_update_start()
  Revert "Bluetooth: Increase HCI reset timeout in hci_dev_do_close"

12 years agominixfs: misplaced checks lead to dentry leak
Al Viro [Wed, 4 Jan 2012 10:51:03 +0000 (10:51 +0000)]
minixfs: misplaced checks lead to dentry leak

bitmap size sanity checks should be done *before* allocating ->s_root;
there their cleanup on failure would be correct.  As it is, we do iput()
on root inode, but leak the root dentry...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach
Oleg Nesterov [Wed, 4 Jan 2012 16:29:20 +0000 (17:29 +0100)]
ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach

This is the temporary simple fix for 3.2, we need more changes in this
area.

1. do_signal_stop() assumes that the running untraced thread in the
   stopped thread group is not possible. This was our goal but it is
   not yet achieved: a stopped-but-resumed tracee can clone the running
   thread which can initiate another group-stop.

   Remove WARN_ON_ONCE(!current->ptrace).

2. A new thread always starts with ->jobctl = 0. If it is auto-attached
   and this group is stopped, __ptrace_unlink() sets JOBCTL_STOP_PENDING
   but JOBCTL_STOP_SIGMASK part is zero, this triggers WANR_ON(!signr)
   in do_jobctl_trap() if another debugger attaches.

   Change __ptrace_unlink() to set the artificial SIGSTOP for report.

   Alternatively we could change ptrace_init_task() to copy signr from
   current, but this means we can copy it for no reason and hide the
   possible similar problems.

Acked-by: Tejun Heo <tj@kernel.org>
Cc: <stable@kernel.org> [3.1]
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE race
Oleg Nesterov [Wed, 4 Jan 2012 16:29:02 +0000 (17:29 +0100)]
ptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE race

Test-case:

int main(void)
{
int pid, status;

pid = fork();
if (!pid) {
for (;;) {
if (!fork())
return 0;
if (waitpid(-1, &status, 0) < 0) {
printf("ERR!! wait: %m\n");
return 0;
}
}
}

assert(ptrace(PTRACE_ATTACH, pid, 0,0) == 0);
assert(waitpid(-1, NULL, 0) == pid);

assert(ptrace(PTRACE_SETOPTIONS, pid, 0,
PTRACE_O_TRACEFORK) == 0);

do {
ptrace(PTRACE_CONT, pid, 0, 0);
pid = waitpid(-1, NULL, 0);
} while (pid > 0);

return 1;
}

It fails because ->real_parent sees its child in EXIT_DEAD state
while the tracer is going to change the state back to EXIT_ZOMBIE
in wait_task_zombie().

The offending commit is 823b018e which moved the EXIT_DEAD check,
but in fact we should not blame it. The original code was not
correct as well because it didn't take ptrace_reparented() into
account and because we can't really trust ->ptrace.

This patch adds the additional check to close this particular
race but it doesn't solve the whole problem. We simply can't
rely on ->ptrace in this case, it can be cleared if the tracer
is multithreaded by the exiting ->parent.

I think we should kill EXIT_DEAD altogether, we should always
remove the soon-to-be-reaped child from ->children or at least
we should never do the DEAD->ZOMBIE transition. But this is too
complex for 3.2.

Reported-and-tested-by: Denys Vlasenko <vda.linux@googlemail.com>
Tested-by: Lukasz Michalik <lmi@ift.uni.wroc.pl>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: <stable@kernel.org> [3.0+]
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Wed, 4 Jan 2012 22:57:55 +0000 (14:57 -0800)]
Merge git://git.samba.org/sfrench/cifs-2.6

* git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] default ntlmv2 for cifs mount delayed to 3.3
  cifs: fix bad buffer length check in coalesce_t2

12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Wed, 4 Jan 2012 16:37:30 +0000 (11:37 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem

12 years agoRevert "rtc: Expire alarms after the time is set."
Linus Torvalds [Wed, 4 Jan 2012 15:57:22 +0000 (07:57 -0800)]
Revert "rtc: Expire alarms after the time is set."

This reverts commit 93b2ec0128c431148b216b8f7337c1a52131ef03.

The call to "schedule_work()" in rtc_initialize_alarm() happens too
early, and can cause oopses at bootup

Neil Brown explains why we do it:

  "If you set an alarm in the future, then shutdown and boot again after
   that time, then you will end up with a timer_queue node which is in
   the past.

   When this happens the queue gets stuck.  That entry-in-the-past won't
   get removed until and interrupt happens and an interrupt won't happen
   because the RTC only triggers an interrupt when the alarm is "now".

   So you'll find that e.g.  "hwclock" will always tell you that
   'select' timed out.

   So we force the interrupt work to happen at the start just in case."

and has a patch that convert it to do things in-process rather than with
the worker thread, but right now it's too late to play around with this,
so we just revert the patch that caused problems for now.

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Requested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Requested-by: John Stultz <john.stultz@linaro.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years ago[CIFS] default ntlmv2 for cifs mount delayed to 3.3
Steve French [Wed, 4 Jan 2012 05:08:24 +0000 (23:08 -0600)]
[CIFS] default ntlmv2 for cifs mount delayed to 3.3

Turned out the ntlmv2 (default security authentication)
upgrade was harder to test than expected, and we ran
out of time to test against Apple and a few other servers
that we wanted to.  Delay upgrade of default security
from ntlm to ntlmv2 (on mount) to 3.3.  Still works
fine to specify it explicitly via "sec=ntlmv2" so this
should be fine.

Acked-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
12 years agocifs: fix bad buffer length check in coalesce_t2
Jeff Layton [Sun, 1 Jan 2012 15:34:39 +0000 (10:34 -0500)]
cifs: fix bad buffer length check in coalesce_t2

The current check looks to see if the RFC1002 length is larger than
CIFSMaxBufSize, and fails if it is. The buffer is actually larger than
that by MAX_CIFS_HDR_SIZE.

This bug has been around for a long time, but the fact that we used to
cap the clients MaxBufferSize at the same level as the server tended
to paper over it. Commit c974befa changed that however and caused this
bug to bite in more cases.

Reported-and-Tested-by: Konstantinos Skarlatos <k.skarlatos@gmail.com>
Tested-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
12 years agoRevert "rtc: Disable the alarm in the hardware"
Linus Torvalds [Wed, 4 Jan 2012 01:32:13 +0000 (17:32 -0800)]
Revert "rtc: Disable the alarm in the hardware"

This reverts commit c0afabd3d553c521e003779c127143ffde55a16f.

It causes failures on Toshiba laptops - instead of disabling the alarm,
it actually seems to enable it on the affected laptops, resulting in
(for example) the laptop powering on automatically five minutes after
shutdown.

There's a patch for it that appears to work for at least some people,
but it's too late to play around with this, so revert for now and try
again in the next merge window.

See for example

http://bugs.debian.org/652869

Reported-and-bisected-by: Andreas Friedrich <afrie@gmx.net> (Toshiba Tecra)
Reported-by: Antonio-M. Corbi Bellot <antonio.corbi@ua.es> (Toshiba Portege R500)
Reported-by: Marco Santos <marco.santos@waynext.com> (Toshiba Portege Z830)
Reported-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> (Toshiba Portege R830)
Cc: Jonathan Nieder <jrnieder@gmail.com>
Requested-by: John Stultz <john.stultz@linaro.org>
Cc: stable@kernel.org # for the versions that applied this
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agohung_task: fix false positive during vfork
Mandeep Singh Baines [Tue, 3 Jan 2012 22:41:13 +0000 (14:41 -0800)]
hung_task: fix false positive during vfork

vfork parent uninterruptibly and unkillably waits for its child to
exec/exit. This wait is of unbounded length. Ignore such waits
in the hung_task detector.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Reported-by: Sasha Levin <levinsasha928@gmail.com>
LKML-Reference: <1325344394.28904.43.camel@lappy>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Kacur <jkacur@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agosecurity: Fix security_old_inode_init_security() when CONFIG_SECURITY is not set
Jan Kara [Tue, 3 Jan 2012 12:14:29 +0000 (13:14 +0100)]
security: Fix security_old_inode_init_security() when CONFIG_SECURITY is not set

Commit 1e39f384bb01 ("evm: fix build problems") makes the stub version
of security_old_inode_init_security() return 0 when CONFIG_SECURITY is
not set.

But that makes callers such as reiserfs_security_init() assume that
security_old_inode_init_security() has set name, value, and len
arguments properly - but security_old_inode_init_security() left them
uninitialized which then results in interesting failures.

Revert security_old_inode_init_security() to the old behavior of
returning EOPNOTSUPP since both callers (reiserfs and ocfs2) handle this
just fine.

[ Also fixed the S_PRIVATE(inode) case of the actual non-stub
  security_old_inode_init_security() function to return EOPNOTSUPP
  for the same reason, as pointed out by Mimi Zohar.

  It got incorrectly changed to match the new function in commit
  fb88c2b6cbb1: "evm: fix security/security_old_init_security return
  code".   - Linus ]

Reported-by: Jorge Bastos <mysql.jorge@decimal.pt>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agofix CAN MAINTAINERS SCM tree type
Oliver Hartkopp [Tue, 3 Jan 2012 19:57:43 +0000 (14:57 -0500)]
fix CAN MAINTAINERS SCM tree type

As pointed out by Joe Perches the SCM tree type was missing in my patch.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
CC: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
CC: Urs Thuermann <urs.thuermann@volkswagen.de>
CC: Wolfgang Grandegger <wg@grandegger.com>
CC: Marc Kleine-Budde <mkl@pengutronix.de>
CC: linux-can@vger.kernel.org
12 years agomwifiex: fix crash during simultaneous scan and connect
Amitkumar Karwar [Tue, 3 Jan 2012 00:18:40 +0000 (16:18 -0800)]
mwifiex: fix crash during simultaneous scan and connect

If 'iw connect' command is fired when driver is already busy in
serving 'iw scan' command, ssid specific scan operation for connect
is skipped. In this case cmd wait queue handler gets called with no
command in queue (i.e. adapter->cmd_queued = NULL).

This patch adds a NULL check in mwifiex_wait_queue_complete()
routine to fix crash observed during simultaneous scan and assoc
operations.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agob43: fix regression in PIO case
Guennadi Liakhovetski [Mon, 26 Dec 2011 17:28:08 +0000 (18:28 +0100)]
b43: fix regression in PIO case

This patch fixes the regression, introduced by

commit 17030f48e31adde5b043741c91ba143f5f7db0fd
From: RafaÅ‚ MiÅ‚ecki <zajec5@gmail.com>
Date: Thu, 11 Aug 2011 17:16:27 +0200
Subject: [PATCH] b43: support new RX header, noticed to be used in 598.314+ fw

in PIO case.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agoath9k: Fix kernel panic in AR2427 in AP mode
Mohammed Shafi Shajakhan [Mon, 26 Dec 2011 05:12:15 +0000 (10:42 +0530)]
ath9k: Fix kernel panic in AR2427 in AP mode

don't do aggregation related stuff for 'AP mode client power save
handling' if aggregation is not enabled in the driver, otherwise it
will lead to panic because those data structures won't be never
intialized in 'ath_tx_node_init' if aggregation is disabled

EIP is at ath_tx_aggr_wakeup+0x37/0x80 [ath9k]
EAX: e8c09a20 EBX: f2a304e8 ECX: 00000001 EDX: 00000000
ESI: e8c085e0 EDI: f2a304ac EBP: f40e1ca4 ESP: f40e1c8c
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process swapper/1 (pid: 0, ti=f40e0000 task=f408e860
task.ti=f40dc000)
Stack:
0001e966 e8c09a20 00000000 f2a304ac e8c085e0 f2a304ac
f40e1cb0 f8186741
f8186700 f40e1d2c f922988d f2a304ac 00000202 00000001
c0b4ba43 00000000
0000000f e8eb75c0 e8c085e0 205b0001 34383220 f2a304ac
f2a30000 00010020
Call Trace:
[<f8186741>] ath9k_sta_notify+0x41/0x50 [ath9k]
[<f8186700>] ? ath9k_get_survey+0x110/0x110 [ath9k]
[<f922988d>] ieee80211_sta_ps_deliver_wakeup+0x9d/0x350
[mac80211]
[<c018dc75>] ? __module_address+0x95/0xb0
[<f92465b3>] ap_sta_ps_end+0x63/0xa0 [mac80211]
[<f9246746>] ieee80211_rx_h_sta_process+0x156/0x2b0
[mac80211]
[<f9247d1e>] ieee80211_rx_handlers+0xce/0x510 [mac80211]
[<c018440b>] ? trace_hardirqs_on+0xb/0x10
[<c056936e>] ? skb_queue_tail+0x3e/0x50
[<f9248271>] ieee80211_prepare_and_rx_handle+0x111/0x750
[mac80211]
[<f9248bf9>] ieee80211_rx+0x349/0xb20 [mac80211]
[<f9248949>] ? ieee80211_rx+0x99/0xb20 [mac80211]
[<f818b0b8>] ath_rx_tasklet+0x818/0x1d00 [ath9k]
[<f8187a75>] ? ath9k_tasklet+0x35/0x1c0 [ath9k]
[<f8187a75>] ? ath9k_tasklet+0x35/0x1c0 [ath9k]
[<f8187b33>] ath9k_tasklet+0xf3/0x1c0 [ath9k]
[<c0151b7e>] tasklet_action+0xbe/0x180

Cc: stable@kernel.org
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Reported-by: Ashwin Mendonca <ashwinloyal@gmail.com>
Tested-by: Ashwin Mendonca <ashwinloyal@gmail.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth
John W. Linville [Tue, 3 Jan 2012 19:26:56 +0000 (14:26 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/padovan/bluetooth

12 years agoCAN MAINTAINERS update
Oliver Hartkopp [Tue, 3 Jan 2012 08:40:28 +0000 (08:40 +0000)]
CAN MAINTAINERS update

Update the CAN MAINTAINERS section:

- point out active maintainers
- pull the CAN driver discussion away from netdev ML
- point to the new CAN web site on gitorious.org
- add CAN development git repository URL to submit patches

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
CC: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
CC: Urs Thuermann <urs.thuermann@volkswagen.de>
CC: Wolfgang Grandegger <wg@grandegger.com>
CC: Marc Kleine-Budde <mkl@pengutronix.de>
CC: linux-can@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: fsl: fec: fix build for mx23-only kernel
Wolfram Sang [Tue, 3 Jan 2012 03:46:47 +0000 (03:46 +0000)]
net: fsl: fec: fix build for mx23-only kernel

If one only selects mx23-based boards, compile fails:

drivers/net/ethernet/freescale/fec.c:410:2: error: 'FEC_HASH_TABLE_HIGH' undeclared (first use in this function)
drivers/net/ethernet/freescale/fec.c:411:2: error: 'FEC_HASH_TABLE_LOW' undeclared (first use in this function)

This is because fec.h uses CONFIG_SOC_IMX28 to determine the register
layout of the core which makes sense since the MX23 does not have a fec.
However, Kconfig uses the broader ARCH_MXS symbol and this way even
makes the fec-driver default for MX23. Adapt Kconfig to use the more
precise SOC_IMX28 as well.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosch_qfq: fix overflow in qfq_update_start()
Eric Dumazet [Mon, 2 Jan 2012 05:47:57 +0000 (05:47 +0000)]
sch_qfq: fix overflow in qfq_update_start()

grp->slot_shift is between 22 and 41, so using 32bit wide variables is
probably a typo.

This could explain QFQ hangs Dave reported to me, after 2^23 packets ?

(23 = 64 - 41)

Reported-by: Dave Taht <dave.taht@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
CC: Dave Taht <dave.taht@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agodrm/radeon/kms/atom: fix possible segfault in pm setup
Alexander Müller [Fri, 30 Dec 2011 17:55:48 +0000 (12:55 -0500)]
drm/radeon/kms/atom: fix possible segfault in pm setup

If we end up with no power states, don't look up
current vddc.

fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=44130

agd5f: fix patch formatting

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agoMerge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6
Linus Torvalds [Mon, 2 Jan 2012 20:34:03 +0000 (12:34 -0800)]
Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6

* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6:
  dt/device: Fix auxdata matching to handle entries without a name override

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Mon, 2 Jan 2012 03:36:08 +0000 (19:36 -0800)]
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: ctnetlink: fix timeout calculation
  ipvs: try also real server with port 0 in backup server
  skge: restore rx multicast filter on resume and after config changes
  mlx4_en: nullify cq->vector field when closing completion queue

12 years agoMerge branch 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Sat, 31 Dec 2011 19:55:06 +0000 (11:55 -0800)]
Merge branch 'fix/asoc' of git://git./linux/kernel/git/tiwai/sound

* 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: wm8776: add missing break in sample size switch

12 years agogspca: Fix falling back to lower isoc alt settings
Mauro Carvalho Chehab [Sat, 31 Dec 2011 13:32:03 +0000 (11:32 -0200)]
gspca: Fix falling back to lower isoc alt settings

The current gspca core code has a regression where it no longer properly
falls back to lower alt settings when there is not enough bandwidth.

This causes many iso based usb-1 cameras to not work when plugged into a
usb2 hub or a sandybridge chipset motherboard!

This patch fixes this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agofutex: Fix uninterruptible loop due to gate_area
Hugh Dickins [Sat, 31 Dec 2011 19:44:01 +0000 (11:44 -0800)]
futex: Fix uninterruptible loop due to gate_area

It was found (by Sasha) that if you use a futex located in the gate
area we get stuck in an uninterruptible infinite loop, much like the
ZERO_PAGE issue.

While looking at this problem, PeterZ realized you'll get into similar
trouble when hitting any install_special_pages() mapping.  And are there
still drivers setting up their own special mmaps without page->mapping,
and without special VM or pte flags to make get_user_pages fail?

In most cases, if page->mapping is NULL, we do not need to retry at all:
Linus points out that even /proc/sys/vm/drop_caches poses no problem,
because it ends up using remove_mapping(), which takes care not to
interfere when the page reference count is raised.

But there is still one case which does need a retry: if memory pressure
called shmem_writepage in between get_user_pages_fast dropping page
table lock and our acquiring page lock, then the page gets switched from
filecache to swapcache (and ->mapping set to NULL) whatever the refcount.
Fault it back in to get the page->mapping needed for key->shared.inode.

Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agonetfilter: ctnetlink: fix timeout calculation
Xi Wang [Fri, 30 Dec 2011 15:40:17 +0000 (10:40 -0500)]
netfilter: ctnetlink: fix timeout calculation

The sanity check (timeout < 0) never works; the dividend is unsigned
and so is the division, which should have been a signed division.

long timeout = (ct->timeout.expires - jiffies) / HZ;
if (timeout < 0)
timeout = 0;

This patch converts the time values to signed for the division.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
12 years agoipvs: try also real server with port 0 in backup server
Julian Anastasov [Fri, 30 Dec 2011 05:19:02 +0000 (14:19 +0900)]
ipvs: try also real server with port 0 in backup server

We should not forget to try for real server with port 0
in the backup server when processing the sync message. We should
do it in all cases because the backup server can use different
forwarding method.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
12 years agoskge: restore rx multicast filter on resume and after config changes
Florian Zumbiehl [Fri, 30 Dec 2011 17:30:09 +0000 (17:30 +0000)]
skge: restore rx multicast filter on resume and after config changes

Restore skge hardware registers for multicast filtering to their
appropriate values after system resume and after hardware restarts
that are done when changing certain settings.

Signed-off-by: Florian Zumbiehl <florz@florz.de>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agomlx4_en: nullify cq->vector field when closing completion queue
Yevgeny Petrilin [Thu, 29 Dec 2011 05:49:58 +0000 (05:49 +0000)]
mlx4_en: nullify cq->vector field when closing completion queue

Caused loss of connectivity when changing ring size.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur...
Linus Torvalds [Fri, 30 Dec 2011 21:45:34 +0000 (13:45 -0800)]
Merge branch 'fixes' of ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm

* 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
  ARM: 7237/1: PL330: Fix driver freeze
  ARM: 7197/1: errata: Remove SMP dependency for erratum 751472
  ARM: 7196/1: errata: Remove SMP dependency for erratum 720789
  ARM: 7220/1: mmc: mmci: Fixup error handling for dma
  ARM: 7214/1: mmc: mmci: Fixup handling of MCI_STARTBITERR

12 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Fri, 30 Dec 2011 21:43:45 +0000 (13:43 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/arm/arm-soc

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: plat-orion: make gpiochip label unique
  enable uncompress log on cpuimx35sd
  cpuimx35: fix touchscreen support
  cpuimx35sd: fix Kconfig
  clock-imx35: fix reboot in internal boot mode
  dma: MX3_IPU fix depends
  imx_v4_v5_defconfig: update default configuration
  cpuimx25sd: fix Kconfig
  arm/imx: fix cpufreq section mismatch
  ARM:imx:fix pwm period value
  ARM: OMAP: hwmod data: fix iva and mailbox hwmods for OMAP 3

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Fri, 30 Dec 2011 21:42:41 +0000 (13:42 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: sentelic - fix retrieving number of buttons
  Input: sentelic - release mutex upon register write failure

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Fri, 30 Dec 2011 21:34:22 +0000 (13:34 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: disable use of dcache for readdir etc.

12 years agoMerge branch 'v3.2-samsung-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 30 Dec 2011 21:34:00 +0000 (13:34 -0800)]
Merge branch 'v3.2-samsung-fixes-4' of git://git./linux/kernel/git/kgene/linux-samsung

* 'v3.2-samsung-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: EXYNOS: Remove duplicated SROMC static memory mapping
  ARM: SAMSUNG: Fix build error when selecting CPU_FREQ_S3C24XX_DEBUGFS on S3C2440

12 years agoRevert "clockevents: Set noop handler in clockevents_exchange_device()"
Linus Torvalds [Fri, 30 Dec 2011 21:24:40 +0000 (13:24 -0800)]
Revert "clockevents: Set noop handler in clockevents_exchange_device()"

This reverts commit de28f25e8244c7353abed8de0c7792f5f883588c.

It results in resume problems for various people. See for example

  http://thread.gmane.org/gmane.linux.kernel/1233033
  http://thread.gmane.org/gmane.linux.kernel/1233389
  http://thread.gmane.org/gmane.linux.kernel/1233159
  http://thread.gmane.org/gmane.linux.kernel/1227868/focus=1230877

and the fedora and ubuntu bug reports

  https://bugzilla.redhat.com/show_bug.cgi?id=767248
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/904569

which got bisected down to the stable version of this commit.

Reported-by: Jonathan Nieder <jrnieder@gmail.com>
Reported-by: Phil Miller <mille121@illinois.edu>
Reported-by: Philip Langdale <philipl@overt.org>
Reported-by: Tim Gardner <tim.gardner@canonical.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg KH <gregkh@suse.de>
Cc: stable@kernel.org # for stable kernels that applied the original
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Fri, 30 Dec 2011 20:13:03 +0000 (12:13 -0800)]
Merge git://www.linux-watchdog.org/linux-watchdog

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing (part 2)
  watchdog: hpwdt: Changes to handle NX secure bit in 32bit path
  watchdog: sp805: Fix section mismatch in ID table.
  watchdog: move coh901327 state holders

12 years agoMerge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
Linus Torvalds [Fri, 30 Dec 2011 01:36:15 +0000 (17:36 -0800)]
Merge branch 'iommu/fixes' of git://git./linux/kernel/git/joro/iommu

* 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu: Initialize domain->handler in iommu_domain_alloc()

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Fri, 30 Dec 2011 01:35:33 +0000 (17:35 -0800)]
Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  packet: fix possible dev refcnt leak when bind fail
  netem: dont call vfree() under spinlock and BH disabled
  netfilter: ctnetlink: fix scheduling while atomic if helper is autoloaded
  netfilter: ctnetlink: fix return value of ctnetlink_get_expect()

12 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 30 Dec 2011 01:09:16 +0000 (17:09 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix raw_spin_unlock_irqrestore() usage
  oprofile, arm/sh: Fix oprofile_arch_exit() linkage issue

12 years agoMerge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 30 Dec 2011 01:05:45 +0000 (17:05 -0800)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: log all dirty inodes in xfs_fs_sync_fs
  xfs: log the inode in ->write_inode calls for kupdate

12 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 30 Dec 2011 00:33:37 +0000 (16:33 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: fix blk_queue_end_tag()
  block: re-use existing 'reading' variable instead of checking direction again
  block, cfq: fix empty queue crash caused by request merge

12 years agomm: hugetlb: fix non-atomic enqueue of huge page
Hillf Danton [Wed, 28 Dec 2011 23:57:16 +0000 (15:57 -0800)]
mm: hugetlb: fix non-atomic enqueue of huge page

If a huge page is enqueued under the protection of hugetlb_lock, then the
operation is atomic and safe.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@vger.kernel.org> [2.6.37+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoprocfs: do not confuse jiffies with cputime64_t
Andreas Schwab [Wed, 28 Dec 2011 23:57:15 +0000 (15:57 -0800)]
procfs: do not confuse jiffies with cputime64_t

Commit 2a95ea6c0d129b4 ("procfs: do not overflow get_{idle,iowait}_time
for nohz") did not take into account that one some architectures jiffies
and cputime use different units.

This causes get_idle_time() to return numbers in the wrong units, making
the idle time fields in /proc/stat wrong.

Instead of converting the usec value returned by
get_cpu_{idle,iowait}_time_us to units of jiffies, use the new function
usecs_to_cputime64 to convert it to the correct unit of cputime64_t.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Artem S. Tashkinov" <t.artem@mailcity.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm/mempolicy.c: refix mbind_range() vma issue
KOSAKI Motohiro [Wed, 28 Dec 2011 23:57:11 +0000 (15:57 -0800)]
mm/mempolicy.c: refix mbind_range() vma issue

commit 8aacc9f550 ("mm/mempolicy.c: fix pgoff in mbind vma merge") is the
slightly incorrect fix.

Why? Think following case.

1. map 4 pages of a file at offset 0

   [0123]

2. map 2 pages just after the first mapping of the same file but with
   page offset 2

   [0123][23]

3. mbind() 2 pages from the first mapping at offset 2.
   mbind_range() should treat new vma is,

   [0123][23]
     |23|
     mbind vma

   but it does

   [0123][23]
     |01|
     mbind vma

   Oops. then, it makes wrong vma merge and splitting ([01][0123] or similar).

This patch fixes it.

[testcase]
  test result - before the patch

case4: 126: test failed. expect '2,4', actual '2,2,2'
        case5: passed
case6: passed
case7: passed
case8: passed
case_n: 246: test failed. expect '4,2', actual '1,4'

------------[ cut here ]------------
kernel BUG at mm/filemap.c:135!
invalid opcode: 0000 [#4] SMP DEBUG_PAGEALLOC

(snip long bug on messages)

  test result - after the patch

case4: passed
        case5: passed
case6: passed
case7: passed
case8: passed
case_n: passed

  source:  mbind_vma_test.c
============================================================
 #include <numaif.h>
 #include <numa.h>
 #include <sys/mman.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>

static unsigned long pagesize;
void* mmap_addr;
struct bitmask *nmask;
char buf[1024];
FILE *file;
char retbuf[10240] = "";
int mapped_fd;

char *rubysrc = "ruby -e '\
  pid = %d; \
  vstart = 0x%llx; \
  vend = 0x%llx; \
  s = `pmap -q #{pid}`; \
  rary = []; \
  s.each_line {|line|; \
    ary=line.split(\" \"); \
    addr = ary[0].to_i(16); \
    if(vstart <= addr && addr < vend) then \
      rary.push(ary[1].to_i()/4); \
    end; \
  }; \
  print rary.join(\",\"); \
'";

void init(void)
{
void* addr;
char buf[128];

nmask = numa_allocate_nodemask();
numa_bitmask_setbit(nmask, 0);

pagesize = getpagesize();

sprintf(buf, "%s", "mbind_vma_XXXXXX");
mapped_fd = mkstemp(buf);
if (mapped_fd == -1)
perror("mkstemp "), exit(1);
unlink(buf);

if (lseek(mapped_fd, pagesize*8, SEEK_SET) < 0)
perror("lseek "), exit(1);
if (write(mapped_fd, "\0", 1) < 0)
perror("write "), exit(1);

addr = mmap(NULL, pagesize*8, PROT_NONE,
    MAP_SHARED, mapped_fd, 0);
if (addr == MAP_FAILED)
perror("mmap "), exit(1);

if (mprotect(addr+pagesize, pagesize*6, PROT_READ|PROT_WRITE) < 0)
perror("mprotect "), exit(1);

mmap_addr = addr + pagesize;

/* make page populate */
memset(mmap_addr, 0, pagesize*6);
}

void fin(void)
{
void* addr = mmap_addr - pagesize;
munmap(addr, pagesize*8);

memset(buf, 0, sizeof(buf));
memset(retbuf, 0, sizeof(retbuf));
}

void mem_bind(int index, int len)
{
int err;

err = mbind(mmap_addr+pagesize*index, pagesize*len,
    MPOL_BIND, nmask->maskp, nmask->size, 0);
if (err)
perror("mbind "), exit(err);
}

void mem_interleave(int index, int len)
{
int err;

err = mbind(mmap_addr+pagesize*index, pagesize*len,
    MPOL_INTERLEAVE, nmask->maskp, nmask->size, 0);
if (err)
perror("mbind "), exit(err);
}

void mem_unbind(int index, int len)
{
int err;

err = mbind(mmap_addr+pagesize*index, pagesize*len,
    MPOL_DEFAULT, NULL, 0, 0);
if (err)
perror("mbind "), exit(err);
}

void Assert(char *expected, char *value, char *name, int line)
{
if (strcmp(expected, value) == 0) {
fprintf(stderr, "%s: passed\n", name);
return;
}
else {
fprintf(stderr, "%s: %d: test failed. expect '%s', actual '%s'\n",
name, line,
expected, value);
// exit(1);
}
}

/*
      AAAA
    PPPPPPNNNNNN
    might become
    PPNNNNNNNNNN
    case 4 below
*/
void case4(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

mem_bind(0, 4);
mem_unbind(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("2,4", retbuf, "case4", __LINE__);

fin();
}

/*
       AAAA
 PPPPPPNNNNNN
 might become
 PPPPPPPPPPNN
 case 5 below
*/
void case5(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

mem_bind(0, 2);
mem_bind(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("4,2", retbuf, "case5", __LINE__);

fin();
}

/*
    AAAA
PPPPNNNNXXXX
might become
PPPPPPPPPPPP 6
*/
void case6(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

mem_bind(0, 2);
mem_bind(4, 2);
mem_bind(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("6", retbuf, "case6", __LINE__);

fin();
}

/*
    AAAA
PPPPNNNNXXXX
might become
PPPPPPPPXXXX 7
*/
void case7(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

mem_bind(0, 2);
mem_interleave(4, 2);
mem_bind(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("4,2", retbuf, "case7", __LINE__);

fin();
}

/*
    AAAA
PPPPNNNNXXXX
might become
PPPPNNNNNNNN 8
*/
void case8(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

mem_bind(0, 2);
mem_interleave(4, 2);
mem_interleave(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("2,4", retbuf, "case8", __LINE__);

fin();
}

void case_n(void)
{
init();
sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);

/* make redundunt mappings [0][1234][34][7] */
mmap(mmap_addr + pagesize*4, pagesize*2, PROT_READ|PROT_WRITE,
     MAP_FIXED|MAP_SHARED, mapped_fd, pagesize*3);

/* Expect to do nothing. */
mem_unbind(2, 2);

file = popen(buf, "r");
fread(retbuf, sizeof(retbuf), 1, file);
Assert("4,2", retbuf, "case_n", __LINE__);

fin();
}

int main(int argc, char** argv)
{
case4();
case5();
case6();
case7();
case8();
case_n();

return 0;
}
=============================================================

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Caspar Zhang <caspar@casparzhang.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: <stable@vger.kernel.org> [3.1.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agogspca: Fix bulk mode cameras no longer working (regression fix)
Hans de Goede [Thu, 29 Dec 2011 21:09:21 +0000 (19:09 -0200)]
gspca: Fix bulk mode cameras no longer working (regression fix)

The new iso bandwidth calculation code accidentally has broken support
for bulk mode cameras. This has broken the following drivers:
finepix, jeilinj, ovfx2, ov534, ov534_9, se401, sq905, sq905c, sq930x,
stv0680, vicam.

Thix patch fixes this. Fix tested with: se401, sq905, sq905c, stv0680 & vicam
cams.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoInput: sentelic - fix retrieving number of buttons
Tai-hwa Liang [Thu, 29 Dec 2011 17:47:36 +0000 (09:47 -0800)]
Input: sentelic - fix retrieving number of buttons

Fixing wrong register offset which is used to retrieve the number of buttons
attached to the hardware.

Signed-off-by: Tai-hwa Liang <avatar@sentelic.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
12 years agoceph: disable use of dcache for readdir etc.
Sage Weil [Thu, 29 Dec 2011 16:05:14 +0000 (08:05 -0800)]
ceph: disable use of dcache for readdir etc.

Ceph attempts to use the dcache to satisfy negative lookups and readdir
when the entire directory contents are in cache.  Disable this behavior
until lingering bugs in this code are shaken out; we'll re-enable these
hooks once things are fully stable.

Signed-off-by: Sage Weil <sage@newdream.net>
12 years agoblock: fix blk_queue_end_tag()
Dan Williams [Thu, 29 Dec 2011 08:16:28 +0000 (09:16 +0100)]
block: fix blk_queue_end_tag()

Commit 5e081591 "block: warn if tag is greater than real_max_depth"
cleaned up blk_queue_end_tag() to warn when the tag is truly invalid
(greater than real_max_depth).  However, it changed behavior in the tag <
max_depth case to not end the request.  Leading to triggering of
BUG_ON(blk_queued_rq(rq)) in the request completion path:

  http://marc.info/?l=linux-kernel&m=132204370518629&w=2

In order to allow blk_queue_resize_tags() to shrink the tag space
blk_queue_end_tag() must always complete tags with a value less than
real_max_depth regardless of the current max_depth.  The comment about
"handling the shrink case" seems to be what prompted changes in this
space, so remove it and BUG on all invalid tags (made even simpler by
Matthew's suggestion to use an unsigned compare).

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Tao Ma <boyu.mt@taobao.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Reported-by: Meelis Roos <mroos@ut.ee>
Reported-by: Ed Nadolski <edmund.nadolski@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
12 years agoARM: EXYNOS: Remove duplicated SROMC static memory mapping
Thomas Abraham [Wed, 28 Dec 2011 06:07:32 +0000 (15:07 +0900)]
ARM: EXYNOS: Remove duplicated SROMC static memory mapping

SROMC static memory mapping is included in the common s5p initialization
code. Hence, remove the duplicated SROMC static memory mapping for EXYNOS.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Cc: stable@kernel.org
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
12 years agoARM: SAMSUNG: Fix build error when selecting CPU_FREQ_S3C24XX_DEBUGFS on S3C2440
Denis Kuzmenko [Wed, 28 Dec 2011 05:04:51 +0000 (14:04 +0900)]
ARM: SAMSUNG: Fix build error when selecting CPU_FREQ_S3C24XX_DEBUGFS on S3C2440

Following is happened when CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
is selected without building of s3c2410-iotiming.c file:

arch/arm/mach-s3c2440/built-in.o:(.data+0x38c): undefined reference to `s3c2410_iotiming_debugfs

Basically, the CONFIG_S3C2410_IOTIMING is not selected for
MACH_MINI2440. Because the s3c2410-iotiming.c is not ever
compiled and enabling CONFIG_CPU_FREQ_S3C24XX_DEBUGFS option
caused undefined reference to s3c2410_iotiming_debugfs()
defined in that file.  The s3c2410_iotiming_debugfs defined
as NULL for this case.

Signed-off-by: Denis Kuzmenko <linux@solonet.org.ua>
Cc: stable@kernel.org
[kgene.kim@samsung.com: removed useless changes]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
12 years agopacket: fix possible dev refcnt leak when bind fail
Wei Yongjun [Wed, 28 Dec 2011 03:32:41 +0000 (22:32 -0500)]
packet: fix possible dev refcnt leak when bind fail

If bind is fail when bind is called after set PACKET_FANOUT
sock option, the dev refcnt will leak.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agowatchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing (part 2)
Wim Van Sebroeck [Mon, 26 Dec 2011 14:23:51 +0000 (15:23 +0100)]
watchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing (part 2)

Redhat Bugzilla: Bug 727875 - TCO_EN bit is disabled by TCO driver

The previous patch breaks reset watchdog behaviour on the older hardware.
It is therefor better to make sure that the behaviour for older hardware (<=ICH5 or
6300ESB) is preserved and that the behaviour for newer hardware is changed.
We therefor use the iTCO_version to see if we need the clearing of the SMI_TCO_EN
bit in the SMI_EN register.

So the new behaviour becomes:
turn_SMI_watchdog_clear_off=0 -> Do not turn off SMI clearing watchdog.
turn_SMI_watchdog_clear_off=1 -> Turn off SMI clearing watchdog when iTCO_version=1
 (ICHO till ICH5 + 6300ESB only)
turn_SMI_watchdog_clear_off=2 -> Turn off SMI clearing watchdog.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
12 years agodrm/i915: Disable RC6 on Sandybridge by default
Keith Packard [Tue, 27 Dec 2011 01:02:11 +0000 (17:02 -0800)]
drm/i915: Disable RC6 on Sandybridge by default

RC6 fails again.

> I found my system freeze mostly during starting up X and KDE. Sometimes it
> works for some minutes, sometimes it freezes immediatly. When the freeze
> happens, everything is dead (even the reset button does not work, I need to
> power cycle).

> I disabled RC6, and my system runs wonderfully.

> The system is a Z68 Pro board with Sandybridge i5-2500K processor, 8
> GB of RAM and UEFI firmware.

Reported-by: Kai Krakow <hurikhan77@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrm/i915: Disable semaphores by default on SNB
Keith Packard [Tue, 27 Dec 2011 01:02:10 +0000 (17:02 -0800)]
drm/i915: Disable semaphores by default on SNB

Semaphores still cause problems on some machines:

> From Udo Steinberg:
>
> With Linux-3.2-rc6 I'm frequently seeing GPU hangs when large amounts of
> text scroll in an xterm, such as when extracting a tar archive. Such as this
> one (note the timestamps):
>
>  I can reproduce it fairly easily with something
>  as simple as:
>
>   while true; do dmesg; done

This patch turns them off on SNB while leaving them on for IVB.

Reported-by: Udo Steinberg <udo@hypervisor.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Eugeni Dodonov <eugeni@dodonov.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge branch 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Mon, 26 Dec 2011 21:17:00 +0000 (13:17 -0800)]
Merge branch 'kvm-updates/3.2' of git://git./virt/kvm/kvm

* 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PPC: e500: include linux/export.h
  KVM: PPC: fix kvmppc_start_thread() for CONFIG_SMP=N
  KVM: PPC: protect use of kvmppc_h_pr
  KVM: PPC: move compute_tlbie_rb to book3s_64 common header
  KVM: Don't automatically expose the TSC deadline timer in cpuid
  KVM: Device assignment permission checks
  KVM: Remove ability to assign a device without iommu support
  KVM: x86: Prevent starting PIT timers in the absence of irqchip support

12 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Linus Torvalds [Mon, 26 Dec 2011 20:46:17 +0000 (12:46 -0800)]
Merge tag 'for-linus' of git://git./linux/kernel/git/ieee1394/linux1394

post 3.2-rc7 pull request

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  MAINTAINERS: firewire git URL update

12 years agovfs: fix handling of lock allocation failure in lease-break case
Linus Torvalds [Mon, 26 Dec 2011 18:25:26 +0000 (10:25 -0800)]
vfs: fix handling of lock allocation failure in lease-break case

Bruce Fields notes that commit 778fc546f749 ("locks: fix tracking of
inprogress lease breaks") introduced a possible error pointer
dereference on failure to allocate memory.  locks_conflict() will
dereference the passed-in new lease lock structure that may be an error pointer.

This means an open (without O_NONBLOCK set) on a file with a lease
applied (generally only done when Samba or nfsd (with v4) is running)
could crash if a kmalloc() fails.

So instead of playing games with IS_ERROR() all over the place, just
check the allocation failure early.  That makes the code more
straightforward, and avoids this possible bad pointer dereference.

Based-on-patch-by: J. Bruce Fields <bfields@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agowatchdog: hpwdt: Changes to handle NX secure bit in 32bit path
Mingarelli, Thomas [Mon, 7 Nov 2011 09:59:00 +0000 (10:59 +0100)]
watchdog: hpwdt: Changes to handle NX secure bit in 32bit path

This patch makes use of the set_memory_x() kernel API in order
to make necessary BIOS calls to source NMIs.

This is needed for SLES11 SP2 and the latest upstream kernel as it appears
the NX Execute Disable has grown in its control.

Signed-off by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable@kernel.org
12 years agowatchdog: sp805: Fix section mismatch in ID table.
Nick Bowler [Mon, 19 Dec 2011 16:22:36 +0000 (11:22 -0500)]
watchdog: sp805: Fix section mismatch in ID table.

The AMBA ID table is marked as __initdata, yet it is referenced by the
driver struct which is not.  This causes a (somewhat unhelpful) section
mismatch warning:

  WARNING: drivers/watchdog/sp805_wdt.o(.data+0x4c): Section mismatch in
           reference from the variable sp805_wdt_driver to the (unknown
           reference) .init.data:(unknown)

Fix this by removing the annotation.

Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
12 years agowatchdog: move coh901327 state holders
Linus Walleij [Mon, 3 Oct 2011 08:52:58 +0000 (10:52 +0200)]
watchdog: move coh901327 state holders

The state holders used in the PM path of the drivers report as
unused variables when compiling without CONFIG_PM so let's
move them inside CONFIG_PM.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
12 years agoKVM: PPC: e500: include linux/export.h
Scott Wood [Tue, 20 Dec 2011 14:43:45 +0000 (14:43 +0000)]
KVM: PPC: e500: include linux/export.h

This is required for THIS_MODULE.  We recently stopped acquiring
it via some other header.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
12 years agoKVM: PPC: fix kvmppc_start_thread() for CONFIG_SMP=N
Michael Neuling [Thu, 10 Nov 2011 16:03:20 +0000 (16:03 +0000)]
KVM: PPC: fix kvmppc_start_thread() for CONFIG_SMP=N

Currently kvmppc_start_thread() tries to wake other SMT threads via
xics_wake_cpu().  Unfortunately xics_wake_cpu only exists when
CONFIG_SMP=Y so when compiling with CONFIG_SMP=N we get:

  arch/powerpc/kvm/built-in.o: In function `.kvmppc_start_thread':
  book3s_hv.c:(.text+0xa1e0): undefined reference to `.xics_wake_cpu'

The following should be fine since kvmppc_start_thread() shouldn't
called to start non-zero threads when SMP=N since threads_per_core=1.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
12 years agoKVM: PPC: protect use of kvmppc_h_pr
Andreas Schwab [Tue, 8 Nov 2011 07:17:39 +0000 (07:17 +0000)]
KVM: PPC: protect use of kvmppc_h_pr

kvmppc_h_pr is only available if CONFIG_KVM_BOOK3S_64_PR.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
12 years agoKVM: PPC: move compute_tlbie_rb to book3s_64 common header
Andreas Schwab [Tue, 8 Nov 2011 07:08:52 +0000 (07:08 +0000)]
KVM: PPC: move compute_tlbie_rb to book3s_64 common header

compute_tlbie_rb is only used on ppc64 and cannot be compiled on ppc32.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
12 years agoKVM: Don't automatically expose the TSC deadline timer in cpuid
Jan Kiszka [Wed, 21 Dec 2011 11:28:29 +0000 (12:28 +0100)]
KVM: Don't automatically expose the TSC deadline timer in cpuid

Unlike all of the other cpuid bits, the TSC deadline timer bit is set
unconditionally, regardless of what userspace wants.

This is broken in several ways:
 - if userspace doesn't use KVM_CREATE_IRQCHIP, and doesn't emulate the TSC
   deadline timer feature, a guest that uses the feature will break
 - live migration to older host kernels that don't support the TSC deadline
   timer will cause the feature to be pulled from under the guest's feet;
   breaking it
 - guests that are broken wrt the feature will fail.

Fix by not enabling the feature automatically; instead report it to userspace.
Because the feature depends on KVM_CREATE_IRQCHIP, which we cannot guarantee
will be called, we expose it via a KVM_CAP_TSC_DEADLINE_TIMER and not
KVM_GET_SUPPORTED_CPUID.

Fixes the Illumos guest kernel, which uses the TSC deadline timer feature.

[avi: add the KVM_CAP + documentation]

Reported-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
Tested-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: Device assignment permission checks
Alex Williamson [Wed, 21 Dec 2011 04:59:09 +0000 (21:59 -0700)]
KVM: Device assignment permission checks

Only allow KVM device assignment to attach to devices which:

 - Are not bridges
 - Have BAR resources (assume others are special devices)
 - The user has permissions to use

Assigning a bridge is a configuration error, it's not supported, and
typically doesn't result in the behavior the user is expecting anyway.
Devices without BAR resources are typically chipset components that
also don't have host drivers.  We don't want users to hold such devices
captive or cause system problems by fencing them off into an iommu
domain.  We determine "permission to use" by testing whether the user
has access to the PCI sysfs resource files.  By default a normal user
will not have access to these files, so it provides a good indication
that an administration agent has granted the user access to the device.

[Yang Bai: add missing #include]
[avi: fix comment style]

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yang Bai <hamo.by@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: Remove ability to assign a device without iommu support
Alex Williamson [Wed, 21 Dec 2011 04:59:03 +0000 (21:59 -0700)]
KVM: Remove ability to assign a device without iommu support

This option has no users and it exposes a security hole that we
can allow devices to be assigned without iommu protection.  Make
KVM_DEV_ASSIGN_ENABLE_IOMMU a mandatory option.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: x86: Prevent starting PIT timers in the absence of irqchip support
Jan Kiszka [Wed, 14 Dec 2011 18:25:13 +0000 (19:25 +0100)]
KVM: x86: Prevent starting PIT timers in the absence of irqchip support

User space may create the PIT and forgets about setting up the irqchips.
In that case, firing PIT IRQs will crash the host:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000128
IP: [<ffffffffa10f6280>] kvm_set_irq+0x30/0x170 [kvm]
...
Call Trace:
 [<ffffffffa11228c1>] pit_do_work+0x51/0xd0 [kvm]
 [<ffffffff81071431>] process_one_work+0x111/0x4d0
 [<ffffffff81071bb2>] worker_thread+0x152/0x340
 [<ffffffff81075c8e>] kthread+0x7e/0x90
 [<ffffffff815a4474>] kernel_thread_helper+0x4/0x10

Prevent this by checking the irqchip mode before starting a timer. We
can't deny creating the PIT if the irqchips aren't set up yet as
current user land expects this order to work.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoMAINTAINERS: firewire git URL update
Stefan Richter [Tue, 20 Dec 2011 20:23:28 +0000 (21:23 +0100)]
MAINTAINERS: firewire git URL update

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
13 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 24 Dec 2011 21:34:44 +0000 (13:34 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  vmwgfx: fix incorrect VRAM size check in vmw_kms_fb_create()
  drm/radeon/kms: bail on BTC parts if MC ucode is missing

13 years agoMerge branch 'nf' of git://1984.lsi.us.es/net
David S. Miller [Sat, 24 Dec 2011 21:10:26 +0000 (16:10 -0500)]
Merge branch 'nf' of git://1984.lsi.us.es/net

13 years agonetem: dont call vfree() under spinlock and BH disabled
Eric Dumazet [Fri, 23 Dec 2011 19:28:51 +0000 (19:28 +0000)]
netem: dont call vfree() under spinlock and BH disabled

commit 6373a9a286 (netem: use vmalloc for distribution table) added a
regression, since vfree() is called while holding a spinlock and BH
being disabled.

Fix this by doing the pointers swap in critical section, and freeing
after spinlock release.

Also add __GFP_NOWARN to the kmalloc() try, since we fallback to
vmalloc().

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agonetfilter: ctnetlink: fix scheduling while atomic if helper is autoloaded
Pablo Neira Ayuso [Sat, 24 Dec 2011 18:28:47 +0000 (19:28 +0100)]
netfilter: ctnetlink: fix scheduling while atomic if helper is autoloaded

This patch fixes one scheduling while atomic error:

[  385.565186] ctnetlink v0.93: registering with nfnetlink.
[  385.565349] BUG: scheduling while atomic: lt-expect_creat/16163/0x00000200

It can be triggered with utils/expect_create included in
libnetfilter_conntrack if the FTP helper is not loaded.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
13 years agonetfilter: ctnetlink: fix return value of ctnetlink_get_expect()
Pablo Neira Ayuso [Sat, 24 Dec 2011 18:03:46 +0000 (19:03 +0100)]
netfilter: ctnetlink: fix return value of ctnetlink_get_expect()

This fixes one bogus error that is returned to user-space:

libnetfilter_conntrack/utils# ./expect_get
TEST: get expectation (-1)(Unknown error 18446744073709551504)

This patch includes the correct handling for EAGAIN (nfnetlink
uses this error value to restart the operation after module
auto-loading).

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
13 years agoLinux 3.2-rc7
Linus Torvalds [Sat, 24 Dec 2011 05:51:06 +0000 (21:51 -0800)]
Linux 3.2-rc7

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 24 Dec 2011 05:47:28 +0000 (21:47 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  VFS: Fix race between CPU hotplug and lglocks

13 years agoMerge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Linus Torvalds [Sat, 24 Dec 2011 04:25:36 +0000 (20:25 -0800)]
Merge tag 'writeback' of git://git./linux/kernel/git/wfg/linux

for linus: writeback reason binary tracing format fix

* tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: show writeback reason with __print_symbolic

13 years agoMerge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Fri, 23 Dec 2011 23:01:24 +0000 (15:01 -0800)]
Merge branch 'rc-fixes' of git://git./linux/kernel/git/mmarek/kbuild

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: adapt update-po-config to new UML layout

13 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Fri, 23 Dec 2011 22:59:08 +0000 (14:59 -0800)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] omap3isp: Fix crash caused by subdevs now having a pointer to devnodes

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Fri, 23 Dec 2011 22:58:39 +0000 (14:58 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: call d_instantiate after all ops are setup
  Btrfs: fix worker lock misuse in find_worker