netdev - [PATCH 06/16] virtio_net: separate virtnet_ctrl_set_mac

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Date:   Tue, 28 Mar 2023 17:28:37 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org
Subject: [PATCH 06/16] virtio_net: separate virtnet_ctrl_set_mac_address()

Separating the code setting MAC by cq to a function.

This is to facilitate separating cq-related functions into a separate
file.

Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
---
 drivers/net/virtio/virtnet.c | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/drivers/net/virtio/virtnet.c b/drivers/net/virtio/virtnet.c
index 0196492f289b..6ad217af44d9 100644
--- a/drivers/net/virtio/virtnet.c
+++ b/drivers/net/virtio/virtnet.c
@@ -1982,13 +1982,29 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
 	return vi->ctrl->status == VIRTIO_NET_OK;
 }
 
+static int virtnet_ctrl_set_mac_address(struct virtnet_info *vi, const void *addr, int len)
+{
+	struct virtio_device *vdev = vi->vdev;
+	struct scatterlist sg;
+
+	sg_init_one(&sg, addr, len);
+
+	if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
+				  VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) {
+		dev_warn(&vdev->dev,
+			 "Failed to set mac address by vq command.\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int virtnet_set_mac_address(struct net_device *dev, void *p)
 {
 	struct virtnet_info *vi = netdev_priv(dev);
 	struct virtio_device *vdev = vi->vdev;
 	int ret;
 	struct sockaddr *addr;
-	struct scatterlist sg;
 
 	if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STANDBY))
 		return -EOPNOTSUPP;
@@ -2002,11 +2018,7 @@ static int virtnet_set_mac_address(struct net_device *dev, void *p)
 		goto out;
 
 	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)) {
-			dev_warn(&vdev->dev,
-				 "Failed to set mac address by vq command.\n");
+		if (virtnet_ctrl_set_mac_address(vi, addr->sa_data, dev->addr_len)) {
 			ret = -EINVAL;
 			goto out;
 		}
@@ -3822,12 +3834,7 @@ static int virtnet_probe(struct virtio_device *vdev)
 	 */
 	if (!virtio_has_feature(vdev, VIRTIO_NET_F_MAC) &&
 	    virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
-		struct scatterlist sg;
-
-		sg_init_one(&sg, dev->dev_addr, dev->addr_len);
-		if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MAC,
-					  VIRTIO_NET_CTRL_MAC_ADDR_SET, &sg)) {
-			pr_debug("virtio_net: setting MAC address failed\n");
+		if (virtnet_ctrl_set_mac_address(vi, dev->dev_addr, dev->addr_len)) {
 			rtnl_unlock();
 			err = -EINVAL;
 			goto free_unregister_netdev;
-- 
2.32.0.3.g01195cf9f