linux-kernel - [PATCH] dm thin: remove needless request

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Message-Id: <20210319081113.16916-1-vulab@iscas.ac.cn>
Date:   Fri, 19 Mar 2021 08:11:13 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     agk@...hat.com, snitzer@...hat.com, dm-devel@...hat.com
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] dm thin: remove needless request_queue NULL pointer check

Since commit ff9ea323816d ("block, bdi: an active gendisk always has a
request_queue associated with it") the request_queue pointer returned
from bdev_get_queue() shall never be NULL.

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
---
 drivers/md/dm-thin.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index fff4c50df74d..985baee3a678 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2816,7 +2816,7 @@ static bool data_dev_supports_discard(struct pool_c *pt)
 {
 	struct request_queue *q = bdev_get_queue(pt->data_dev->bdev);
 
-	return q && blk_queue_discard(q);
+	return blk_queue_discard(q);
 }
 
 static bool is_factor(sector_t block_size, uint32_t n)
-- 
2.17.1