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| author | Jens Axboe <axboe@kernel.dk> | 2020-05-28 22:19:29 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-28 22:20:39 +0300 |
| commit | b0beb28097fa04177b3769f4bb7a0d0d9c4ae76e (patch) | |
| tree | e1fb1bb2d47a2e2b1b471a1d6426b9a39b184190 /block | |
| parent | 15fede122b23e126baeba69558a14c68e5d9359f (diff) | |
| download | linux-b0beb28097fa04177b3769f4bb7a0d0d9c4ae76e.tar.xz | |
Revert "block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT"
This reverts commit c58c1f83436b501d45d4050fd1296d71a9760bcb.
io_uring does do the right thing for this case, and we're still returning
-EAGAIN to userspace for the cases we don't support. Revert this change
to avoid doing endless spins of resubmits.
Cc: stable@vger.kernel.org # v5.6
Reported-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 7e4a1da0715e..9bfaee050c82 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -891,14 +891,11 @@ generic_make_request_checks(struct bio *bio) } /* - * Non-mq queues do not honor REQ_NOWAIT, so complete a bio - * with BLK_STS_AGAIN status in order to catch -EAGAIN and - * to give a chance to the caller to repeat request gracefully. + * For a REQ_NOWAIT based request, return -EOPNOTSUPP + * if queue is not a request based queue. */ - if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_mq(q)) { - status = BLK_STS_AGAIN; - goto end_io; - } + if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_mq(q)) + goto not_supported; if (should_fail_bio(bio)) goto end_io; |