[Intel-gfx] [PATCH 4/4] drm/i915: no need to hold mutex for object lookup

[Chris Wilson]

---
 drivers/gpu/drm/i915/i915_gem.c |    3 +--
 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 2b4dd5a..00bf1cf 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3657,15 +3657,14 @@ 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
-- 
1.6.3.1