drm/layerscape: fix handling fsl_dcu_drm_plane_index result
authorAndrzej Hajda <a.hajda@samsung.com>
Mon, 21 Sep 2015 13:33:47 +0000 (15:33 +0200)
committerDave Airlie <airlied@redhat.com>
Wed, 23 Sep 2015 22:13:09 +0000 (08:13 +1000)
commit14d11b8dca17f6dedf4b62d7391b9b294e3414ff
treed736e1992a6ab26ca66f94d34d948e1d8fec4062
parent728f86607d47f7d2d24d61fd30852faa66ca5aa9
drm/layerscape: fix handling fsl_dcu_drm_plane_index result

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c