Ville Syrjälä 4b176ae176 drm/i915: Don't grab crtc mutexes in intel_modeset_gem_init() ...

commit 7ad228b11e upstream.

When the pipe A force quirk is applied the code will attempt to grab
a crtc mutex during intel_modeset_setup_hw_state(). If we're already
holding all crtc mutexes this will obviously deadlock every time.

So instead of using drm_modeset_lock_all() just grab the
mode_config.mutex. This is enough to avoid the unlocked mutex warnings
from certain lower level functions.

The regression was introduced in:

 commit 0274766428
 Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
 Date:   Mon Dec 2 11:08:06 2013 +0200

    drm/i915: Take modeset locks around intel_modeset_setup_hw_state()

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add cc: stable since the offending commit has that, too.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-01-25 08:27:12 -08:00

..

drm

drm/i915: Don't grab crtc mutexes in intel_modeset_gem_init()

2014-01-25 08:27:12 -08:00

host1x

drivers/gpu/host1x/drm: don't check resource with devm_ioremap_resource

2013-05-18 11:55:30 +02:00

vga

fbcon: fix locking harder

2013-02-08 12:02:43 +10:00

Makefile

gpu: host1x: Add host1x driver

2013-04-22 12:32:40 +02:00