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md/raid10: wait barrier before returning discard request with REQ_NOWAIT 

JIRA: https://issues.redhat.com/browse/RHEL-83988

commit 3db4404435397a345431b45f57876a3df133f3b4
Author: Xiao Ni <xni@redhat.com>
Date:   Thu Mar 6 17:49:38 2025 +0800

    md/raid10: wait barrier before returning discard request with REQ_NOWAIT

    raid10_handle_discard should wait barrier before returning a discard bio
    which has REQ_NOWAIT. And there is no need to print warning calltrace
    if a discard bio has REQ_NOWAIT flag. Quality engineer usually checks
    dmesg and reports error if dmesg has warning/error calltrace.

    Fixes: c9aa889b035f ("md: raid10 add nowait support")
    Signed-off-by: Xiao Ni <xni@redhat.com>
    Acked-by: Coly Li <colyli@kernel.org>
    Link: https://lore.kernel.org/linux-raid/20250306094938.48952-1-xni@redhat.com
    Signed-off-by: Yu Kuai <yukuai3@huawei.com>

Signed-off-by: Nigel Croxon <ncroxon@redhat.com>
This commit is contained in:
Nigel Croxon 2025-03-19 11:00:41 -04:00
parent 3924dfe93a
commit b26d49eb91
1 changed files with 1 additions and 2 deletions
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3
drivers/md/raid10.c
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@ -1624,11 +1624,10 @@ static int raid10_handle_discard(struct mddev *mddev, struct bio *bio)
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
return -EAGAIN;
if (WARN_ON_ONCE(bio->bi_opf & REQ_NOWAIT)) {
if (!wait_barrier(conf, bio->bi_opf & REQ_NOWAIT)) {
bio_wouldblock_error(bio);
return 0;
}
wait_barrier(conf, false);
/*
* Check reshape again to avoid reshape happens after checking