[media] media: exynos4-is: fix deadlock on driver probe
authorMarek Szyprowski <m.szyprowski@samsung.com>
Thu, 28 Apr 2016 10:25:03 +0000 (07:25 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Mon, 2 May 2016 13:39:26 +0000 (10:39 -0300)
commit243d4c0270a184e91ae589138652e19394edb1e7
treea2dfe53bf2e5ff7f04fb28a023245d4f7fd0c094
parent89a095668304e8a02502ffd35edacffdbf49aa8c
[media] media: exynos4-is: fix deadlock on driver probe

Commit 0c426c472b5585ed6e59160359c979506d45ae49 ("[media] media: Always
keep a graph walk large enough around") changed
media_device_register_entity() function to take mdev->graph_mutex. This
causes deadlock in driver probe, which calls (indirectly) this function
with ->graph_mutex taken. This patch removes taking ->graph_mutex in
driver probe to avoid deadlock. Other drivers don't take ->graph_mutex
for entity registration, so this change should be safe.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/platform/exynos4-is/media-dev.c