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From: Xie Yongji <xieyongji@bytedance.com>
To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com
Cc: amit@kernel.org, arei.gonglei@huawei.com, airlied@linux.ie,
	kraxel@redhat.com, dan.j.williams@intel.com,
	johannes@sipsolutions.net, ohad@wizery.com,
	bjorn.andersson@linaro.org, david@redhat.com, vgoyal@redhat.com,
	miklos@szeredi.hu, sgarzare@redhat.com,
	virtualization@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: [RFC PATCH 14/17] virtio_mem: Remove unused used length
Date: Mon, 17 May 2021 17:08:33 +0800	[thread overview]
Message-ID: <20210517090836.533-15-xieyongji@bytedance.com> (raw)
In-Reply-To: <20210517090836.533-1-xieyongji@bytedance.com>

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

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

diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 10ec60d81e84..32a8e359a5c3 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -1256,7 +1256,6 @@ static uint64_t virtio_mem_send_request(struct virtio_mem *vm,
 					const struct virtio_mem_req *req)
 {
 	struct scatterlist *sgs[2], sg_req, sg_resp;
-	unsigned int len;
 	int rc;
 
 	/* don't use the request residing on the stack (vaddr) */
@@ -1277,7 +1276,7 @@ static uint64_t virtio_mem_send_request(struct virtio_mem *vm,
 	virtqueue_kick(vm->vq);
 
 	/* wait for a response */
-	wait_event(vm->host_resp, virtqueue_get_buf(vm->vq, &len));
+	wait_event(vm->host_resp, virtqueue_get_buf(vm->vq, NULL));
 
 	return virtio16_to_cpu(vm->vdev, vm->resp.type);
 }
-- 
2.11.0


  parent reply	other threads:[~2021-05-17  9:14 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-17  9:08 [RFC PATCH 00/17] Add validation for used length Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 01/17] virtio_ring: Avoid reading unneeded " Xie Yongji
2021-05-17  9:11   ` Johannes Berg
2021-05-17  9:11     ` Johannes Berg
2021-05-17  9:41     ` Yongji Xie
2021-05-17  9:08 ` [RFC PATCH 02/17] virtio-blk: Remove unused " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 03/17] virtio_console: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 04/17] crypto: virtio - " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 05/17] drm/virtio: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 06/17] caif_virtio: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 07/17] virtio_net: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 08/17] mac80211_hwsim: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 09/17] virtio_pmem: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 10/17] rpmsg: virtio: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 11/17] virtio_scsi: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 12/17] virtio_balloon: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 13/17] virtio_input: " Xie Yongji
2021-05-17  9:08 ` Xie Yongji [this message]
2021-05-17  9:08 ` [RFC PATCH 15/17] virtiofs: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 16/17] vsock: " Xie Yongji
2021-05-17  9:08 ` [RFC PATCH 17/17] virtio_ring: Add validation for " Xie Yongji
2021-05-17 23:39   ` Michael S. Tsirkin
2021-05-17 23:39     ` Michael S. Tsirkin
2021-05-25  1:31     ` Jason Wang
2021-05-25  1:31       ` Jason Wang
2021-05-25  5:08       ` Yongji Xie
2021-05-17 23:40 ` [RFC PATCH 00/17] " Michael S. Tsirkin
2021-05-17 23:40   ` Michael S. Tsirkin
2021-05-18  8:29   ` Yongji Xie
2021-05-18  9:52     ` Michael S. Tsirkin
2021-05-18  9:52       ` Michael S. Tsirkin
2021-05-18 12:28       ` Yongji Xie

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