virtio_net: remove unused parameter to send_command

All the code passes NULL for the last sg list (in).
Simplify by just removing it.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 21 deletions

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 56c2229d28fd..d26f695ee64d 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -876,13 +876,12 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
  * never fail unless improperly formated.
  */
 static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
-                                 struct scatterlist *out,
-                                 struct scatterlist *in)
+                                 struct scatterlist *out)
 {
         struct scatterlist *sgs[4], hdr, stat;
         struct virtio_net_ctrl_hdr ctrl;
         virtio_net_ctrl_ack status = ~0;
-        unsigned out_num = 0, in_num = 0, tmp;
+        unsigned out_num = 0, tmp;
 
         /* Caller should know better */
         BUG_ON(!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_VQ));
@@ -895,16 +894,13 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
 
         if (out)
                 sgs[out_num++] = out;
-        if (in)
-                sgs[out_num + in_num++] = in;
 
         /* Add return status. */
         sg_init_one(&stat, &status, sizeof(status));
-        sgs[out_num + in_num++] = &stat;
+        sgs[out_num] = &stat;
 
-        BUG_ON(out_num + in_num > ARRAY_SIZE(sgs));
-        BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, in_num, vi, GFP_ATOMIC)
-               < 0);
+        BUG_ON(out_num + 1 > ARRAY_SIZE(sgs));
+        BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC) < 0);
 
         if (unlikely(!virtqueue_kick(vi->cvq)))
                 return status == VIRTIO_NET_OK;
@@ -934,8 +930,7 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p)
         if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
                 sg_init_one(&sg, addr->sa_data, dev->addr_len);
                 if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
-                                          VIRTIO_NET_CTRL_MAC_ADDR_SET,
-                                          &sg, NULL)) {
+                                          VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) {
                         dev_warn(&vdev->dev,
                                  "Failed to set mac address by vq command.\n");
                         return -EINVAL;
@@ -1008,7 +1003,7 @@ static void virtnet_ack_link_announce(struct virtnet_info *vi)
 {
         rtnl_lock();
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_ANNOUNCE,
-                                  VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL, NULL))
+                                  VIRTIO_NET_CTRL_ANNOUNCE_ACK, NULL))
                 dev_warn(&vi->dev->dev, "Failed to ack link announce.\n");
         rtnl_unlock();
 }
@@ -1026,7 +1021,7 @@ static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs)
         sg_init_one(&sg, &s, sizeof(s));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
-                                  VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg, NULL)) {
+                                  VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg)) {
                 dev_warn(&dev->dev, "Fail to set num of queue pairs to %d\n",
                          queue_pairs);
                 return -EINVAL;
@@ -1076,16 +1071,14 @@ static void virtnet_set_rx_mode(struct net_device *dev)
         sg_init_one(sg, &promisc, sizeof(promisc));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
-                                  VIRTIO_NET_CTRL_RX_PROMISC,
-                                  sg, NULL))
+                                  VIRTIO_NET_CTRL_RX_PROMISC, sg))
                 dev_warn(&dev->dev, "Failed to %sable promisc mode.\n",
                          promisc ? "en" : "dis");
 
         sg_init_one(sg, &allmulti, sizeof(allmulti));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_RX,
-                                  VIRTIO_NET_CTRL_RX_ALLMULTI,
-                                  sg, NULL))
+                                  VIRTIO_NET_CTRL_RX_ALLMULTI, sg))
                 dev_warn(&dev->dev, "Failed to %sable allmulti mode.\n",
                          allmulti ? "en" : "dis");
 
@@ -1121,8 +1114,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
                    sizeof(mac_data->entries) + (mc_count * ETH_ALEN));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
-                                  VIRTIO_NET_CTRL_MAC_TABLE_SET,
-                                  sg, NULL))
+                                  VIRTIO_NET_CTRL_MAC_TABLE_SET, sg))
                 dev_warn(&dev->dev, "Failed to set MAC filter table.\n");
 
         kfree(buf);
@@ -1137,7 +1129,7 @@ static int virtnet_vlan_rx_add_vid(struct net_device *dev,
         sg_init_one(&sg, &vid, sizeof(vid));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
-                                  VIRTIO_NET_CTRL_VLAN_ADD, &sg, NULL))
+                                  VIRTIO_NET_CTRL_VLAN_ADD, &sg))
                 dev_warn(&dev->dev, "Failed to add VLAN ID %d.\n", vid);
         return 0;
 }
@@ -1151,7 +1143,7 @@ static int virtnet_vlan_rx_kill_vid(struct net_device *dev,
         sg_init_one(&sg, &vid, sizeof(vid));
 
         if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN,
-                                  VIRTIO_NET_CTRL_VLAN_DEL, &sg, NULL))
+                                  VIRTIO_NET_CTRL_VLAN_DEL, &sg))
                 dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid);
         return 0;
 }