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f2fs: fix inode rwsem regression 

This is similar to 942491c9e6 ("xfs: fix AIM7 regression")
Apparently our current rwsem code doesn't like doing the trylock, then
lock for real scheme.  So change our read/write methods to just do the
trylock for the RWF_NOWAIT case.

We don't need a check for IOCB_NOWAIT and !direct-IO because it
is checked in generic_write_checks().

Fixes: b91050a80c ("f2fs: add nowait aio support")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Goldwyn Rodrigues 2019-09-11 11:45:17 -05:00 committed by Jaegeuk Kim
parent 9819403055
commit cb8434f164
1 changed files with 3 additions and 2 deletions
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5
fs/f2fs/file.c
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@ -3230,11 +3230,12 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
goto out;
}
if (!inode_trylock(inode)) {
if (iocb->ki_flags & IOCB_NOWAIT) {
if (iocb->ki_flags & IOCB_NOWAIT) {
if (!inode_trylock(inode)) {
ret = -EAGAIN;
goto out;
}
} else {
inode_lock(inode);
}