From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Fri, 9 Aug 2013 11:11:25 +0000 (-0300)
Subject: [media] media: vb2: Fix potential deadlock in vb2_prepare_buffer
X-Git-Tag: v3.12-rc1~135^2~85
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a517cca6b24fc54ac209e44118ec8962051662e3;p=pandora-kernel.git

[media] media: vb2: Fix potential deadlock in vb2_prepare_buffer

Commit b037c0fde22b1d3cd0b3c3717d28e54619fc1592 ("media: vb2: fix
potential deadlock in mmap vs. get_userptr handling") fixes an AB-BA
deadlock related to the mmap_sem and driver locks. The same deadlock can
occur in vb2_prepare_buffer(), fix it the same way.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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