linux-kernel - [PATCH v3] blk-zoned: Remove needless request

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Message-Id: <20210913012402.554-1-vulab@iscas.ac.cn>
Date:   Mon, 13 Sep 2021 01:24:02 +0000
From:   Xu Wang <vulab@...as.ac.cn>
To:     axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] blk-zoned: Remove needless request_queue NULL pointer

The request_queue pointer returned from bdev_get_queue() shall
never be NULL, so the NULL checks are unnecessary, just remove them.

Signed-off-by: Xu Wang <vulab@...as.ac.cn>
Reported-by: kernel test robot <lkp@...el.com>
Changes since v2:
- Make the q variable assignment together with declaration.
Changes since v3:
- Fix error function use reported by kernel test robot.
---
 block/blk-zoned.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 1d0c76c18fc5..b797e24d4aa3 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -346,17 +346,13 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
 {
 	void __user *argp = (void __user *)arg;
 	struct zone_report_args args;
-	struct request_queue *q;
+	struct request_queue *q = bdev_get_queue(bdev);
 	struct blk_zone_report rep;
 	int ret;
 
 	if (!argp)
 		return -EINVAL;
 
-	q = bdev_get_queue(bdev);
-	if (!q)
-		return -ENXIO;
-
 	if (!blk_queue_is_zoned(q))
 		return -ENOTTY;
 
@@ -403,7 +399,7 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 			   unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
-	struct request_queue *q;
+	struct request_queue *q = bdev_get_queue(bdev);
 	struct blk_zone_range zrange;
 	enum req_opf op;
 	int ret;
@@ -411,10 +407,6 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
 	if (!argp)
 		return -EINVAL;
 
-	q = bdev_get_queue(bdev);
-	if (!q)
-		return -ENXIO;
-
 	if (!blk_queue_is_zoned(q))
 		return -ENOTTY;
 
-- 
2.17.1