diff mbox series

[v2,3/4] md/raid10: fix improper BUG_ON() in raise_barrier()

Message ID 20220914014914.398712-4-yukuai1@huaweicloud.com (mailing list archive)
State Superseded, archived
Headers show
Series md/raid10: reduce lock contention for io | expand

Commit Message

Yu Kuai Sept. 14, 2022, 1:49 a.m. UTC 
From: Yu Kuai <yukuai3@huawei.com>

'conf->barrier' is protected by 'conf->resync_lock', reading
'conf->barrier' without holding the lock is wrong.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/md/raid10.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 0edcd98461fe..377d4641bb54 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -936,8 +936,8 @@  static void flush_pending_writes(struct r10conf *conf)
 
 static void raise_barrier(struct r10conf *conf, int force)
 {
-	BUG_ON(force && !conf->barrier);
 	spin_lock_irq(&conf->resync_lock);
+	BUG_ON(force && !conf->barrier);
 
 	/* Wait until no block IO is waiting (unless 'force') */
 	wait_event_lock_irq(conf->wait_barrier, force || !conf->nr_waiting,