From: Ville Syrjälä Date: Fri, 13 Jun 2014 08:10:53 +0000 (+0300) Subject: drm/i915: Add locking around framebuffer_references-- X-Git-Tag: MMI-PSA29.97-13-9~11757^2~63^2~38 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=60a5ca015ffd;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: Add locking around framebuffer_references-- obj->framebuffer_references isn't an atomic_t so the decrement needs to be protected by some lock. struct_mutex seems like the appropriate lock here, and we may already take it for the obj unref anyway. Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1880c18a4e09..b9251c863cd2 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11594,11 +11594,14 @@ static void intel_setup_outputs(struct drm_device *dev) static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb) { + struct drm_device *dev = fb->dev; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); drm_framebuffer_cleanup(fb); + mutex_lock(&dev->struct_mutex); WARN_ON(!intel_fb->obj->framebuffer_references--); - drm_gem_object_unreference_unlocked(&intel_fb->obj->base); + drm_gem_object_unreference(&intel_fb->obj->base); + mutex_unlock(&dev->struct_mutex); kfree(intel_fb); }