From: Jesse Barnes Date: Wed, 10 Feb 2010 23:09:44 +0000 (-0800) Subject: drm/i915: hold ref on flip object until it completes X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=75dfca80a610e4e87d3b9ccfb3f520692808697d;p=deliverable%2Flinux.git drm/i915: hold ref on flip object until it completes This will prevent things from falling over if the user frees the flip buffer before we complete the flip, since we'll hold an internal reference. Reported-by: Kristian Høgsberg Signed-off-by: Jesse Barnes Signed-off-by: Eric Anholt --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c161ace7132d..b27202d23ebc 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4094,6 +4094,7 @@ static void intel_unpin_work_fn(struct work_struct *__work) mutex_lock(&work->dev->struct_mutex); i915_gem_object_unpin(work->old_fb_obj); + drm_gem_object_unreference(work->pending_flip_obj); drm_gem_object_unreference(work->old_fb_obj); mutex_unlock(&work->dev->struct_mutex); kfree(work); @@ -4221,8 +4222,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, return ret; } - /* Reference the old fb object for the scheduled work. */ + /* Reference the objects for the scheduled work. */ drm_gem_object_reference(work->old_fb_obj); + drm_gem_object_reference(obj); crtc->fb = fb; i915_gem_object_flush_write_domain(obj);