From: Chao Yu <yuchao0@huawei.com>
Date: Wed, 17 Jan 2018 08:31:37 +0000 (+0800)
Subject: f2fs: fix to update last_disk_size correctly
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=eb4497975e82448746bb7de3d13b743b7145aed7;p=openwrt%2Fstaging%2Fblogic.git

f2fs: fix to update last_disk_size correctly

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>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 2b892a619d71..fa91bfeb754b 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1716,10 +1716,14 @@ 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)