virtio_pci_modern: pass cmd as an identification token

In preparation to asynchronous admin queue processing, pass cmd pointer
as a data arg to virtqueue_add_sgs().

Signed-off-by: Jiri Pirko <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>

Author: Jiri Pirko

drivers/virtio/virtio_pci_modern.c

@@ -58,7 +58,7 @@ static int virtqueue_exec_admin_cmd(struct virtio_pci_admin_vq *admin_vq,
 				    struct scatterlist **sgs,
 				    unsigned int out_num,
 				    unsigned int in_num,
-				    void *data)
+				    struct virtio_admin_cmd *cmd)
 {
 	struct virtqueue *vq;
 	int ret, len;
@@ -72,7 +72,7 @@ static int virtqueue_exec_admin_cmd(struct virtio_pci_admin_vq *admin_vq,
 	    !((1ULL << opcode) & admin_vq->supported_cmds))
 		return -EOPNOTSUPP;
 
-	ret = virtqueue_add_sgs(vq, sgs, out_num, in_num, data, GFP_KERNEL);
+	ret = virtqueue_add_sgs(vq, sgs, out_num, in_num, cmd, GFP_KERNEL);
 	if (ret < 0)
 		return -EIO;
 
@@ -140,7 +140,7 @@ int vp_modern_admin_cmd_exec(struct virtio_device *vdev,
 	mutex_lock(&vp_dev->admin_vq.cmd_lock);
 	ret = virtqueue_exec_admin_cmd(&vp_dev->admin_vq,
 				       le16_to_cpu(cmd->opcode),
-				       sgs, out_num, in_num, sgs);
+				       sgs, out_num, in_num, cmd);
 	mutex_unlock(&vp_dev->admin_vq.cmd_lock);
 
 	if (ret) {