linux-toradex.git/drivers/base, branch v2.6.32.4

Driver core: fix race in dev_driver_string

2009-12-18T22:04:17+00:00

commit 3589972e51fac1e02d0aaa576fa47f568cb94d40 upstream.

This patch (as1310) works around a race in dev_driver_string().  If
the device is unbound while the function is running, dev->driver might
become NULL after we test it and before we dereference it.

Signed-off-by: Alan Stern 
Cc: Oliver Neukum 
Signed-off-by: Greg Kroah-Hartman

PM / Runtime: Fix lockdep warning in __pm_runtime_set_status()

2009-12-18T22:03:10+00:00

commit bab636b921017f0db6e0c2979438f50b898a9808 upstream.

Lockdep complains about taking the parent lock in
__pm_runtime_set_status(), so mark it as nested.

Signed-off-by: Rafael J. Wysocki 
Reported-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

PM: fix irq enable/disable in runtime PM code

2009-11-29T15:51:27+00:00

This patch (as1305) fixes a bug in the irq-enable settings and removes
some related overhead in the runtime PM code.

	In __pm_runtime_resume(), within the scope of the original
	spin_lock_irq(), we know that irqs are disabled.  There's no
	reason to go through a pair of enable/disable cycles when
	acquiring and releasing the parent's lock.

	In __pm_runtime_set_status(), irqs are already disabled when
	the parent's lock is acquired, and they must remain disabled
	when it is released.

Signed-off-by: Alan Stern 
Signed-off-by: Rafael J. Wysocki

PM: Remove some debug messages producing too much noise

2009-11-03T10:18:18+00:00

pm_runtime_idle() is somewhat noisy. Remove debug prints.

Signed-off-by: Pavel Machek 
Signed-off-by: Rafael J. Wysocki

PM: Fix warning on suspend errors

2009-11-03T10:03:33+00:00

Fixes the point where we need to complete the power transition when
device suspend fails, so that we don't print warnings about devices
added to the device hierarchy after a failing suspend.

[rjw: Modified changelog.]

Signed-off-by: Romit Dasgupta 
Signed-off-by: Rafael J. Wysocki

Driver core: allow certain drivers prohibit bind/unbind via sysfs

2009-10-30T21:59:51+00:00

Platform drivers registered via platform_driver_probe() can be bound
to devices only once, upon registration, because discard their probe()
routines to save memory. Unbinding the driver through sysfs 'unbind'
leaves the device stranded and confuses users so let's not create
bind and unbind attributes for such drivers.

Signed-off-by: Dmitry Torokhov 
Cc: Éric Piel 
Signed-off-by: Greg Kroah-Hartman

Driver core: fix driver_register() return value

2009-10-30T21:59:51+00:00

In this patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=16dc42e018c2868211b4928f20a957c0c216126c
the check was added for another driver to already claim the same device
on the same bus. But the returned error code was wrong: to modprobe, the
-EEXIST means that _this_ driver is already installed. It therefore
doesn't produce the needed error message when _another_ driver is trying
to register for the same device.  Returning -EBUSY fixes the problem.

Signed-off-by: Stas Sergeev 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman

mm: oom analysis: add shmem vmstat

2009-09-22T14:17:27+00:00

Recently we encountered OOM problems due to memory use of the GEM cache.
Generally a large amuont of Shmem/Tmpfs pages tend to create a memory
shortage problem.

We often use the following calculation to determine the amount of shmem
pages:

shmem = NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES

however the expression does not consider isolated and mlocked pages.

This patch adds explicit accounting for pages used by shmem and tmpfs.

Signed-off-by: KOSAKI Motohiro 
Acked-by: Rik van Riel 
Reviewed-by: Christoph Lameter 
Acked-by: Wu Fengguang 
Cc: David Rientjes 
Cc: Hugh Dickins 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: oom analysis: Show kernel stack usage in /proc/meminfo and OOM log output

2009-09-22T14:17:27+00:00

The amount of memory allocated to kernel stacks can become significant and
cause OOM conditions.  However, we do not display the amount of memory
consumed by stacks.

Add code to display the amount of memory used for stacks in /proc/meminfo.

Signed-off-by: KOSAKI Motohiro 
Reviewed-by: Christoph Lameter 
Reviewed-by: Minchan Kim 
Reviewed-by: Rik van Riel 
Cc: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Driver-Core: extend devnode callbacks to provide permissions

2009-09-19T19:50:38+00:00

This allows subsytems to provide devtmpfs with non-default permissions
for the device node. Instead of the default mode of 0600, null, zero,
random, urandom, full, tty, ptmx now have a mode of 0666, which allows
non-privileged processes to access standard device nodes in case no
other userspace process applies the expected permissions.

This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain.

Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman