[PATCH AUTOSEL for 4.15 069/189] f2fs: fix to update last_disk_size correctly

[Sasha Levin]

From: Chao Yu <yuch...@huawei.com>

[ Upstream commit eb4497975e82448746bb7de3d13b743b7145aed7 ]

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

Signed-off-by: Chao Yu <yuch...@huawei.com>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@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:
                }
        }
 
-       down_write(&F2FS_I(inode)->i_sem);
-       if (F2FS_I(inode)->last_disk_size < psize)
-               F2FS_I(inode)->last_disk_size = 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 = psize;
+               up_write(&F2FS_I(inode)->i_sem);
+       }
 
 done:
        if (err && err != -ENOENT)
-- 
2.15.1