pds_vdpa: reset to vdpa specified mac

When the vdpa device is reset, also reinitialize it with the mac address
that was assigned when the device was added.

Fixes: 151cc83 ("pds_vdpa: add support for vdpa and vdpamgmt interfaces")
Signed-off-by: Allen Hubbe <allen.hubbe@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20230711042437.69381-2-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

Author: ahubbe-amd

drivers/vdpa/pds/vdpa_dev.c

@@ -409,6 +409,8 @@ static void pds_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
 			pdsv->vqs[i].avail_idx = 0;
 			pdsv->vqs[i].used_idx = 0;
 		}
+
+		pds_vdpa_cmd_set_mac(pdsv, pdsv->mac);
 	}
 
 	if (status & ~old_status & VIRTIO_CONFIG_S_FEATURES_OK) {
@@ -532,7 +534,6 @@ static int pds_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 	struct device *dma_dev;
 	struct pci_dev *pdev;
 	struct device *dev;
-	u8 mac[ETH_ALEN];
 	int err;
 	int i;
 
@@ -617,19 +618,18 @@ static int pds_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 	 * or set a random mac if default is 00:..:00
 	 */
 	if (add_config->mask & BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
-		ether_addr_copy(mac, add_config->net.mac);
-		pds_vdpa_cmd_set_mac(pdsv, mac);
+		ether_addr_copy(pdsv->mac, add_config->net.mac);
 	} else {
 		struct virtio_net_config __iomem *vc;
 
 		vc = pdsv->vdpa_aux->vd_mdev.device;
-		memcpy_fromio(mac, vc->mac, sizeof(mac));
-		if (is_zero_ether_addr(mac)) {
-			eth_random_addr(mac);
-			dev_info(dev, "setting random mac %pM\n", mac);
-			pds_vdpa_cmd_set_mac(pdsv, mac);
+		memcpy_fromio(pdsv->mac, vc->mac, sizeof(pdsv->mac));
+		if (is_zero_ether_addr(pdsv->mac)) {
+			eth_random_addr(pdsv->mac);
+			dev_info(dev, "setting random mac %pM\n", pdsv->mac);
 		}
 	}
+	pds_vdpa_cmd_set_mac(pdsv, pdsv->mac);
 
 	for (i = 0; i < pdsv->num_vqs; i++) {
 		pdsv->vqs[i].qid = i;

drivers/vdpa/pds/vdpa_dev.h

@@ -39,6 +39,7 @@ struct pds_vdpa_device {
 	u64 req_features;		/* features requested by vdpa */
 	u8 vdpa_index;			/* rsvd for future subdevice use */
 	u8 num_vqs;			/* num vqs in use */
+	u8 mac[ETH_ALEN];		/* mac selected when the device was added */
 	struct vdpa_callback config_cb;
 	struct notifier_block nb;
 };