Btrfs: fix missing error handler if submiting re-read bio fails

We forgot to free failure record and bio after submitting re-read bio failed,
fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

fs/btrfs/extent_io.c

@@ -2348,6 +2348,11 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 	ret = tree->ops->submit_bio_hook(inode, read_mode, bio,
 					 failrec->this_mirror,
 					 failrec->bio_flags, 0);
+	if (ret) {
+		free_io_failure(inode, failrec, 0);
+		bio_put(bio);
+	}
+
 	return ret;
 }