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drm/i915: Move drm_framebuffer_unreference out of struct_mutex for takeover

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intel_user_framebuffer_destroy() requires the struct_mutex for its
object bookkeeping, so this means that all calls to
drm_framebuffer_unreference must be held without that lock.

This is a simplified version of the identically named patch by Chris Wilson.

    Regression from commit ab8d66752a
    Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
    Date:   Mon Feb 2 15:44:15 2015 +0000

        drm/i915: Track old framebuffer instead of object

v2: Bikeshedding.

References: https://bugs.freedesktop.org/show_bug.cgi?id=89166
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Tvrtko Ursulin 2015-04-13 16:03:03 +01:00 committed by Jani Nikula
parent 08d9bc920d
commit e0d6149b3d
1 changed files with 8 additions and 6 deletions
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14
drivers/gpu/drm/i915/intel_display.c
View File

@ -14259,6 +14259,7 @@ void intel_modeset_gem_init(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *c;
struct drm_i915_gem_object *obj;
int ret;
mutex_lock(&dev->struct_mutex);
intel_init_gt_powersave(dev);
@ -14283,16 +14284,18 @@ void intel_modeset_gem_init(struct drm_device *dev)
* pinned & fenced. When we do the allocation it's too early
* for this.
*/
mutex_lock(&dev->struct_mutex);
for_each_crtc(dev, c) {
obj = intel_fb_obj(c->primary->fb);
if (obj == NULL)
continue;
if (intel_pin_and_fence_fb_obj(c->primary,
c->primary->fb,
c->primary->state,
NULL)) {
mutex_lock(&dev->struct_mutex);
ret = intel_pin_and_fence_fb_obj(c->primary,
c->primary->fb,
c->primary->state,
NULL);
mutex_unlock(&dev->struct_mutex);
if (ret) {
DRM_ERROR("failed to pin boot fb on pipe %d\n",
to_intel_crtc(c)->pipe);
drm_framebuffer_unreference(c->primary->fb);
@ -14300,7 +14303,6 @@ void intel_modeset_gem_init(struct drm_device *dev)
update_state_fb(c->primary);
}
}
mutex_unlock(&dev->struct_mutex);
intel_backlight_register(dev);
}