linux-kernel - [PATCH] fs: ntfs: super: added return error value while map failed

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Message-Id: <20210629095333.115111-1-lijian_8010a29@163.com>
Date:   Tue, 29 Jun 2021 09:53:33 +0000
From:   lijian_8010a29@....com
To:     clm@...com, josef@...icpanda.com, dsterba@...e.com
Cc:     linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        lijian <lijian@...ong.com>
Subject: [PATCH] fs: ntfs: super: added return error value while map failed

From: lijian <lijian@...ong.com>

When lookup_extent_mapping failed, should return '-ENOENT'.

Signed-off-by: lijian <lijian@...ong.com>
---
 fs/btrfs/extent_map.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 4a8e02f7b6c7..e9d9f2bfc11d 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -305,8 +305,10 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
 
 	WARN_ON(!em || em->start != start);
 
-	if (!em)
+	if (!em) {
+		ret = -ENOENT;
 		goto out;
+	}
 
 	em->generation = gen;
 	clear_bit(EXTENT_FLAG_PINNED, &em->flags);
-- 
2.17.1