From d24bae32fa9b541eb87edf1b3439f590c3b2dda5 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Mon, 9 Dec 2013 16:17:40 -0800 Subject: [PATCH] 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 Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller --- drivers/net/virtio_net.c | 34 +++++++++++++--------------------- 1 file 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; } -- 2.34.1