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gfs2: Prevent direct-I/O write fallback errors from getting lost 

[ Upstream commit 43a511c44e58e357a687d61a20cf5ef1dc9e5a7c ]

When a direct I/O write falls entirely and falls back to buffered I/O and the
buffered I/O fails, the write failed with return value 0 instead of the error
number reported by the buffered I/O. Fix that.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andreas Gruenbacher 2021-05-10 12:25:59 +02:00 committed by Greg Kroah-Hartman
parent c8eff67629
commit 50b8e1be15
1 changed files with 4 additions and 1 deletions
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5
fs/gfs2/file.c
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@ -875,8 +875,11 @@ static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
current->backing_dev_info = inode_to_bdi(inode);
buffered = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
current->backing_dev_info = NULL;
if (unlikely(buffered <= 0))
if (unlikely(buffered <= 0)) {
if (!ret)
ret = buffered;
goto out_unlock;
}
/*
* We need to ensure that the page cache pages are written to