git.ipfire.org Git - thirdparty/kernel/stable.git/commit

author	Dave Airlie <airlied@redhat.com>
	Mon, 22 Jun 2015 04:40:44 +0000 (14:40 +1000)
committer	Sasha Levin <sasha.levin@oracle.com>
	Sun, 5 Jul 2015 14:12:48 +0000 (10:12 -0400)
commit	c44ed568ae2ef49bb72d55c8a12e6ca19758b845
tree	9798fac99f92c5c8dd8cd3602b91b9b2631b88c6	tree \| snapshot
parent	0e266aadab119ef07719c6ec92ed720027379bab	commit \| diff

drm/dp/mst: take lock around looking up the branch device on hpd irq

[ Upstream commit 9eb1e57f564d4e6e10991402726cc83fe0b9172f ]

If we are doing an MST transaction and we've gotten HPD and we
lookup the device from the incoming msg, we should take the mgr
lock around it, so that mst_primary and mstb->ports are valid.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>