tree 33fb230e4392878537e19a01d724b9a7a00eb313
parent 1baee58638fc58248625255f5c5fcdb987f11b1f
author Daniel Vetter <daniel.vetter@ffwll.ch> 1365690415 +0000
committer Dave Airlie <airlied@redhat.com> 1365740472 +1000

drm/fb-helper: Fix locking in drm_fb_helper_hotplug_event

Driver's and ->fill_modes functions are allowed to grab crtc mutexes
(for e.g. load detect). Hence we need to first only grab the general
kms mutex, and only in a second step grab all locks to do the
modesets.

This prevents a deadlock on my gm45 in the tv load detect code called
by drm_helper_probe_single_connector_modes.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>