[PATCH AUTOSEL for 4.14 48/64] f2fs: fix to clear FI_NO_PREALLOC

[alexander . levin]

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

[ Upstream commit 28cfafb73853f0494b06649716687a3ea07681d5 ]

We need to clear FI_NO_PREALLOC flag in error path of f2fs_file_write_iter,
otherwise we will lose the chance to preallocate blocks in latter write()
at one time.

Fixes: dc91de78e5e1 ("f2fs: do not preallocate blocks which has wrong buffer")
Signed-off-by: Chao Yu <yuch...@huawei.com>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 fs/f2fs/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 6ce467872376..b8372095ba0a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2697,6 +2697,7 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, 
struct iov_iter *from)
 
                err = f2fs_preallocate_blocks(iocb, from);
                if (err) {
+                       clear_inode_flag(inode, FI_NO_PREALLOC);
                        inode_unlock(inode);
                        return err;
                }
-- 
2.11.0