diff options
| author | Christoph Hellwig <hch@lst.de> | 2026-01-26 08:53:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-01-28 15:16:39 +0300 |
| commit | 4ad357e39b2ecd5da7bcc7e840ee24d179593cd5 (patch) | |
| tree | 4fc1f7a70d872cdfc9607a8525842ca171c13b0a | |
| parent | 8dd5e7c75d7bb2635c7efd219ff20693fc24096a (diff) | |
| download | linux-4ad357e39b2ecd5da7bcc7e840ee24d179593cd5.tar.xz | |
iomap: fix submission side handling of completion side errors
The "if (dio->error)" in iomap_dio_bio_iter exists to stop submitting
more bios when a completion already return an error. Commit cfe057f7db1f
("iomap_dio_actor(): fix iov_iter bugs") made it revert the iov by
"copied", which is very wrong given that we've already consumed that
range and submitted a bio for it.
Fixes: cfe057f7db1f ("iomap_dio_actor(): fix iov_iter bugs")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/iomap/direct-io.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index 4000c8596d9b..867c0ac6df8f 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -443,9 +443,13 @@ static int iomap_dio_bio_iter(struct iomap_iter *iter, struct iomap_dio *dio) nr_pages = bio_iov_vecs_to_alloc(dio->submit.iter, BIO_MAX_VECS); do { size_t n; - if (dio->error) { - iov_iter_revert(dio->submit.iter, copied); - copied = ret = 0; + + /* + * If completions already occurred and reported errors, give up now and + * don't bother submitting more bios. + */ + if (unlikely(data_race(dio->error))) { + ret = 0; goto out; } |