linux-kernel - [RFC PATCH 11/17] virtio_scsi: Remove unused used length

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Message-Id: <20210517090836.533-12-xieyongji@bytedance.com>
Date:   Mon, 17 May 2021 17:08:30 +0800
From:   Xie Yongji <xieyongji@...edance.com>
To:     mst@...hat.com, jasowang@...hat.com, stefanha@...hat.com
Cc:     amit@...nel.org, arei.gonglei@...wei.com, airlied@...ux.ie,
        kraxel@...hat.com, dan.j.williams@...el.com,
        johannes@...solutions.net, ohad@...ery.com,
        bjorn.andersson@...aro.org, david@...hat.com, vgoyal@...hat.com,
        miklos@...redi.hu, sgarzare@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 11/17] virtio_scsi: Remove unused used length

The used length is not used. Let's drop it and
pass NULL to virtqueue_get_buf() instead.

Signed-off-by: Xie Yongji <xieyongji@...edance.com>
---
 drivers/scsi/virtio_scsi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index b9c86a7e3b97..0ebf23ec844b 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -173,14 +173,13 @@ static void virtscsi_vq_done(struct virtio_scsi *vscsi,
 			     void (*fn)(struct virtio_scsi *vscsi, void *buf))
 {
 	void *buf;
-	unsigned int len;
 	unsigned long flags;
 	struct virtqueue *vq = virtscsi_vq->vq;
 
 	spin_lock_irqsave(&virtscsi_vq->vq_lock, flags);
 	do {
 		virtqueue_disable_cb(vq);
-		while ((buf = virtqueue_get_buf(vq, &len)) != NULL)
+		while ((buf = virtqueue_get_buf(vq, NULL)) != NULL)
 			fn(vscsi, buf);
 
 		if (unlikely(virtqueue_is_broken(vq)))
-- 
2.11.0