diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 7727893238c7..59718903e1ef 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -813,6 +813,7 @@ static int sr_probe(struct device *dev)
 
 fail_put:
 	put_disk(disk);
+	mutex_destroy(&cd->lock);
 fail_free:
 	kfree(cd);
 fail: