From: Hans Verkuil <hverkuil@xs4all.nl>
Date: Fri, 26 Nov 2010 09:43:51 +0000 (-0300)
Subject: [media] v4l2-dev: use mutex_lock_interruptible instead of plain mutex_lock
X-Git-Tag: v2.6.37-rc7~22^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2877842de8cbf6272b0a851cb12587b7dd8c2afb;p=pandora-kernel.git

[media] v4l2-dev: use mutex_lock_interruptible instead of plain mutex_lock

Where reasonable use mutex_lock_interruptible instead of mutex_lock.
Also fix the poll, read and write error codes when called with an unregistered
device (e.g. after a USB device was disconnected). Poll must return
POLLERR|POLLHUP and read/write must return -ENODEV.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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