[PATCH -next 12/29] md/raid5-cache: use new apis to suspend array for r5c_journal_mode_store()

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

r5c_journal_mode_set() will suspend array and it has only 2 caller, the
other caller raid_ctl() already suspend the array with new apis.

This is not hot path, so performance is not concerned.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 drivers/md/raid5-cache.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index c71cb5c954e0..51a68fbc241c 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -2585,9 +2585,7 @@ int r5c_journal_mode_set(struct mddev *mddev, int mode)
 	    mode == R5C_JOURNAL_MODE_WRITE_BACK)
 		return -EINVAL;
 
-	mddev_suspend(mddev);
 	conf->log->r5c_journal_mode = mode;
-	mddev_resume(mddev);
 
 	pr_debug("md/raid:%s: setting r5c cache mode to %d: %s\n",
 		 mdname(mddev), mode, r5c_journal_mode_str[mode]);
@@ -2612,11 +2610,11 @@ static ssize_t r5c_journal_mode_store(struct mddev *mddev,
 		if (strlen(r5c_journal_mode_str[mode]) == len &&
 		    !strncmp(page, r5c_journal_mode_str[mode], len))
 			break;
-	ret = mddev_lock(mddev);
+	ret = mddev_suspend_and_lock(mddev);
 	if (ret)
 		return ret;
 	ret = r5c_journal_mode_set(mddev, mode);
-	mddev_unlock(mddev);
+	mddev_unlock_and_resume(mddev);
 	return ret ?: length;
 }
 
-- 
2.39.2