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md: fix return value of mddev_trylock

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A return value of 0 is treaded as successful lock acquisition. In fact, a
return value of 1 means getting the lock successfully.

Link: https://lore.kernel.org/linux-raid/20260127073951.17248-1-xni@redhat.com
Fixes: 9e59d60976 ("md: call del_gendisk in control path")
Reported-by: Bart Van Assche <bvanassche@acm.org>
Closes: https://lore.kernel.org/linux-raid/20250611073108.25463-1-xni@redhat.com/T/#mfa369ef5faa4aa58e13e6d9fdb88aecd862b8f2f
Signed-off-by: Xiao Ni <xni@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by:  Li Nan <linan122@huawei.com>
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
This commit is contained in:
Xiao Ni
2026-01-27 15:39:27 +08:00
committed by Yu Kuai
parent 6abc7d5dcf
commit 05c8de4f09
1 changed files with 2 additions and 2 deletions
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4
drivers/md/md.h
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@@ -735,8 +735,8 @@ static inline int mddev_trylock(struct mddev *mddev)
int ret;
ret = mutex_trylock(&mddev->reconfig_mutex);
if (!ret && test_bit(MD_DELETED, &mddev->flags)) {
ret = -ENODEV;
if (ret && test_bit(MD_DELETED, &mddev->flags)) {
ret = 0;
mutex_unlock(&mddev->reconfig_mutex);
}
return ret;