linux-kernel - [PATCH] virtio-blk: modify the value type of num in virtio_queue

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Date:   Wed, 17 Nov 2021 06:39:55 +0000
From:   cgel.zte@...il.com
To:     mst@...hat.com
Cc:     jasowang@...hat.com, pbonzini@...hat.com, stefanha@...hat.com,
        axboe@...nel.dk, virtualization@...ts.linux-foundation.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ye Guojin <ye.guojin@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] virtio-blk: modify the value type of num in virtio_queue_rq()

From: Ye Guojin <ye.guojin@....com.cn>

This was found by coccicheck:
./drivers/block/virtio_blk.c, 334, 14-17, WARNING Unsigned expression
compared with zero  num < 0

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Ye Guojin <ye.guojin@....com.cn>
---
 drivers/block/virtio_blk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 97bf051a50ce..eed1666eff31 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -316,7 +316,7 @@ static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
 	struct request *req = bd->rq;
 	struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
 	unsigned long flags;
-	unsigned int num;
+	int num;
 	int qid = hctx->queue_num;
 	bool notify = false;
 	blk_status_t status;
-- 
2.25.1