drm/i915: Release and unlock on mmap_gtt error path.

We failed to unlock the mutex after failing to create the mmap offset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ff0d94dd3550..f565b6afe414 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -758,8 +758,11 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
 
         if (!obj_priv->mmap_offset) {
                 ret = i915_gem_create_mmap_offset(obj);
-                if (ret)
+                if (ret) {
+                        drm_gem_object_unreference(obj);
+                        mutex_unlock(&dev->struct_mutex);
                         return ret;
+                }
         }
 
         args->offset = obj_priv->mmap_offset;