For drm_gem_object_unreference callers are required to hold dev->struct_mutex, which these paths don't. Enforcing this requirement has become a bit more strict with
commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663 Author: Daniel Vetter daniel.vetter@ffwll.ch Date: Thu Oct 15 09:36:25 2015 +0200
drm/gem: Check locking in drm_gem_object_unreference
Cc: Tomi Valkeinen tomi.valkeinen@ti.com Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- drivers/gpu/drm/omapdrm/omap_fbdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c b/drivers/gpu/drm/omapdrm/omap_fbdev.c index 3cb16f0cf381..89da41ac64d2 100644 --- a/drivers/gpu/drm/omapdrm/omap_fbdev.c +++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c @@ -153,7 +153,7 @@ static int omap_fbdev_create(struct drm_fb_helper *helper, /* note: if fb creation failed, we can't rely on fb destroy * to unref the bo: */ - drm_gem_object_unreference(fbdev->bo); + drm_gem_object_unreference_unlocked(fbdev->bo); ret = PTR_ERR(fb); goto fail; }