X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fi915%2Fi915_debugfs.c;h=4bd1467c17b17c6225e27e05ccbde63444012f39;hb=2c7367626733e27d6f6d9906db7a31ada587566b;hp=d689e511744e8f2fc9508e2d7345827c6a70bbb2;hpb=d8462d0ad350ccd399899de051060ee562a5e537;p=karo-tx-linux.git

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index d689e511744e..4bd1467c17b1 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -292,6 +292,8 @@ static int per_file_stats(int id, void *ptr, void *data)
 	struct file_stats *stats = data;
 	struct i915_vma *vma;
 
+	lockdep_assert_held(&obj->base.dev->struct_mutex);
+
 	stats->count++;
 	stats->total += obj->base.size;
 	if (!obj->bind_count)
@@ -476,6 +478,8 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
 		struct drm_i915_gem_request *request;
 		struct task_struct *task;
 
+		mutex_lock(&dev->struct_mutex);
+
 		memset(&stats, 0, sizeof(stats));
 		stats.file_priv = file->driver_priv;
 		spin_lock(&file->table_lock);
@@ -487,7 +491,6 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
 		 * still alive (e.g. get_pid(current) => fork() => exit()).
 		 * Therefore, we need to protect this ->comm access using RCU.
 		 */
-		mutex_lock(&dev->struct_mutex);
 		request = list_first_entry_or_null(&file_priv->mm.request_list,
 						   struct drm_i915_gem_request,
 						   client_link);
@@ -497,6 +500,7 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
 				PIDTYPE_PID);
 		print_file_stats(m, task ? task->comm : "<unknown>", stats);
 		rcu_read_unlock();
+
 		mutex_unlock(&dev->struct_mutex);
 	}
 	mutex_unlock(&dev->filelist_mutex);