diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2014-01-07 16:15:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-25 08:49:30 -0800 |
| commit | 94e61221d5c23789da5925c7f6dafdcf3491354d (patch) | |
| tree | 04b0235280d2cf21ba2aad060b503cc9ca7c7aff | |
| parent | 02f8b9bcfa032827a7ddd78ea5eb3a8393ec037c (diff) | |
drm/i915: Don't grab crtc mutexes in intel_modeset_gem_init()
commit 7ad228b11ec26a820291c9f5a1168d6176580dc1 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 027476642811f8559cbe00ef6cc54db230e48a20
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>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index aad6f7bfc589..dd2d542e4651 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -10592,9 +10592,9 @@ void intel_modeset_gem_init(struct drm_device *dev) intel_setup_overlay(dev); - drm_modeset_lock_all(dev); + mutex_lock(&dev->mode_config.mutex); intel_modeset_setup_hw_state(dev, false); - drm_modeset_unlock_all(dev); + mutex_unlock(&dev->mode_config.mutex); } void intel_modeset_cleanup(struct drm_device *dev) |