[PATCH 1/1] md: fix return value of mddev_trylock

[Xiao Ni <xni@redhat.com>]

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

Fixes: 9e59d609763f ("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>
---
 drivers/md/md.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/md.h b/drivers/md/md.h
index 6985f2829bbd..3bfbee595156 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -737,8 +737,8 @@ 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;
-- 
2.50.1 (Apple Git-155)