1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/drm/sis_mm.c b/drivers/char/drm/sis_mm.c
index 6be1c5757580..a6b7ccdaf73d 100644
--- a/drivers/char/drm/sis_mm.c
+++ b/drivers/char/drm/sis_mm.c
@@ -134,6 +134,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
                       dev_priv->agp_initialized)) {
                 DRM_ERROR
                     ("Attempt to allocate from uninitialized memory manager.\n");
+                mutex_unlock(&dev->struct_mutex);
                 return -EINVAL;
         }