From: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Date: Thu, 7 Feb 2013 21:36:12 +0000 (-0300)
Subject: [media] s3c-camif: Fail on insufficient number of allocated buffers
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~81^2~558
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69b95a3a80b44ebb71bf153e79bcb8580e1d3de5;p=pandora-kernel.git

[media] s3c-camif: Fail on insufficient number of allocated buffers

Ensure the driver gets always at least its minimum required
number of buffers allocated by checking actual number of
allocated buffers in vb2_reqbufs(). And free any partially
allocated buffer queue with signaling an error to user space.
Without this patch applications may wait forever to dequeue
a filled buffer, because the hardware didn't even start after
VIDIOC_STREAMON, VIDIOC_QBUF calls, due to insufficient number
of empty buffers.

Reported-by: Alexander Nestorov <alexandernst@gmail.com>
Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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