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md/bitmap: resume array on backlog_store() error path

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backlog_store() suspends the array before checking whether a write-mostly
device exists. If no such device exists, the error path only unlocks
reconfig_mutex and leaves the array suspended, blocking subsequent I/O.

Use mddev_unlock_and_resume() to release both states.

Fixes: 58226942ad ("md: use new apis to suspend array before mddev_create/destroy_serial_pool")

Signed-off-by: Chen Cheng <chencheng@fnnas.com>
Reviewed-by: Yu Kuai <yukuai@fygo.io>
Link: https://patch.msgid.link/20260718034236.4119093-1-chencheng@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fygo.io>
This commit is contained in:
Chen Cheng 2026-07-18 11:42:36 +08:00 committed by Yu Kuai
parent 85764f475f
commit 2911cd0a0f
1 changed files with 1 additions and 1 deletions
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2
drivers/md/md-bitmap.c
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@ -2857,7 +2857,7 @@ backlog_store(struct mddev *mddev, const char *buf, size_t len)
if (!has_write_mostly) {
pr_warn_ratelimited("%s: can't set backlog, no write mostly device available\n",
mdname(mddev));
mddev_unlock(mddev);
mddev_unlock_and_resume(mddev);
return -EINVAL;
}