Commits
Dave Airlie committed e60bd2d701a
drm/dp/mst: take lock around looking up the branch device on hpd irq commit 9eb1e57f564d4e6e10991402726cc83fe0b9172f upstream. 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> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>