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-rw-r--r--block/blk-core.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 93603e6ff479..817446175489 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -83,18 +83,14 @@ void blk_queue_congestion_threshold(struct request_queue *q)
* @bdev: device
*
* Locates the passed device's request queue and returns the address of its
- * backing_dev_info
- *
- * Will return NULL if the request queue cannot be located.
+ * backing_dev_info. This function can only be called if @bdev is opened
+ * and the return value is never NULL.
*/
struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
{
- struct backing_dev_info *ret = NULL;
struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- ret = &q->backing_dev_info;
- return ret;
+ return &q->backing_dev_info;
}
EXPORT_SYMBOL(blk_get_backing_dev_info);