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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Chao Yu <yuchao0@huawei.com>, Jaegeuk Kim <jaegeuk@kernel.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.15 069/189] f2fs: fix to update last_disk_size
 correctly
Thread-Topic: [PATCH AUTOSEL for 4.15 069/189] f2fs: fix to update
 last_disk_size correctly
Thread-Index: AQHTz5grNxn16xWUIkCJh9BYzrhgdQ==
Date:   Mon, 9 Apr 2018 00:17:39 +0000
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From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit eb4497975e82448746bb7de3d13b743b7145aed7 ]

This patch fixes to update last_disk_size only when writing out page
successfully.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 fs/f2fs/data.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 516fa0d3ff9c..3399ddb723dd 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1571,10 +1571,14 @@ write:
 		}
 	}
=20
-	down_write(&F2FS_I(inode)->i_sem);
-	if (F2FS_I(inode)->last_disk_size < psize)
-		F2FS_I(inode)->last_disk_size =3D psize;
-	up_write(&F2FS_I(inode)->i_sem);
+	if (err) {
+		file_set_keep_isize(inode);
+	} else {
+		down_write(&F2FS_I(inode)->i_sem);
+		if (F2FS_I(inode)->last_disk_size < psize)
+			F2FS_I(inode)->last_disk_size =3D psize;
+		up_write(&F2FS_I(inode)->i_sem);
+	}
=20
 done:
 	if (err && err !=3D -ENOENT)
--=20
2.15.1