add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/ntb_netdev.c
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@@ -71,7 +71,6 @@
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 static unsigned int tx_stop = 5;
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 struct ntb_netdev {
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-	struct list_head list;
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 	struct pci_dev *pdev;
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 	struct net_device *ndev;
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 	struct ntb_transport_qp *qp;
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@@ -80,8 +79,6 @@
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 #define	NTB_TX_TIMEOUT_MS	1000
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 #define	NTB_RXQ_SIZE		100
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-
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-static LIST_HEAD(dev_list);
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 static void ntb_netdev_event_handler(void *data, int link_is_up)
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 {
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@@ -140,7 +137,7 @@
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 enqueue_again:
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 	rc = ntb_transport_rx_enqueue(qp, skb, skb->data, ndev->mtu + ETH_HLEN);
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 	if (rc) {
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-		dev_kfree_skb(skb);
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+		dev_kfree_skb_any(skb);
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 		ndev->stats.rx_errors++;
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 		ndev->stats.rx_fifo_errors++;
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 	}
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@@ -195,7 +192,7 @@
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 		ndev->stats.tx_aborted_errors++;
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 	}
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-	dev_kfree_skb(skb);
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+	dev_kfree_skb_any(skb);
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 	if (ntb_transport_tx_free_entry(dev->qp) >= tx_start) {
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 		/* Make sure anybody stopping the queue after this sees the new
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@@ -452,7 +449,7 @@
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 	if (rc)
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 		goto err1;
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-	list_add(&dev->list, &dev_list);
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+	dev_set_drvdata(client_dev, ndev);
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 	dev_info(&pdev->dev, "%s created\n", ndev->name);
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 	return 0;
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@@ -465,27 +462,8 @@
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 static void ntb_netdev_remove(struct device *client_dev)
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 {
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-	struct ntb_dev *ntb;
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-	struct net_device *ndev;
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-	struct pci_dev *pdev;
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-	struct ntb_netdev *dev;
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-	bool found = false;
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-
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-	ntb = dev_ntb(client_dev->parent);
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-	pdev = ntb->pdev;
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-
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-	list_for_each_entry(dev, &dev_list, list) {
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-		if (dev->pdev == pdev) {
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-			found = true;
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-			break;
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-		}
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-	}
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-	if (!found)
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-		return;
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-
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-	list_del(&dev->list);
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-
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-	ndev = dev->ndev;
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+	struct net_device *ndev = dev_get_drvdata(client_dev);
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+	struct ntb_netdev *dev = netdev_priv(ndev);
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 	unregister_netdev(ndev);
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 	ntb_transport_free_queue(dev->qp);
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@@ -506,7 +484,14 @@
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 	rc = ntb_transport_register_client_dev(KBUILD_MODNAME);
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 	if (rc)
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 		return rc;
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-	return ntb_transport_register_client(&ntb_netdev_client);
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+
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+	rc = ntb_transport_register_client(&ntb_netdev_client);
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+	if (rc) {
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+		ntb_transport_unregister_client_dev(KBUILD_MODNAME);
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+		return rc;
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+	}
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+
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+	return 0;
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 }
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 module_init(ntb_netdev_init_module);
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