drm/i915: no need to hold mutex for object lookup

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

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2d705e8a297..744bf9803ea 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3701,15 +3701,14 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
         struct drm_gem_object *obj;
         struct drm_i915_gem_object *obj_priv;
 
-        mutex_lock(&dev->struct_mutex);
         obj = drm_gem_object_lookup(dev, file_priv, args->handle);
         if (obj == NULL) {
                 DRM_ERROR("Bad handle in i915_gem_busy_ioctl(): %d\n",
                           args->handle);
-                mutex_unlock(&dev->struct_mutex);
                 return -EBADF;
         }
 
+        mutex_lock(&dev->struct_mutex);
         /* Update the active list for the hardware's current position.
          * Otherwise this only updates on a delayed timer or when irqs are
          * actually unmasked, and our working set ends up being larger than