enic: bug fix: don't set netdev->name too early

Bug fix: don't set netdev->name early before netdev registration.  Setting
netdev->name early with dev_alloc_name() would occasionally cause netdev
registration to fail returning error that device was already registered.
Since we're using netdev->name to name MSI-X vectors, we now need to
move the request_irq after netdev registartion, so move it to ->open.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 46 insertions, 75 deletions

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index d403ce29a141..f3a47a87dbbe 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -1250,13 +1250,28 @@ static int enic_open(struct net_device *netdev)
 	unsigned int i;
 	int err;
 
+	err = enic_request_intr(enic);
+	if (err) {
+		printk(KERN_ERR PFX "%s: Unable to request irq.\n",
+			netdev->name);
+		return err;
+	}
+
+	err = enic_notify_set(enic);
+	if (err) {
+		printk(KERN_ERR PFX
+			"%s: Failed to alloc notify buffer, aborting.\n",
+			netdev->name);
+		goto err_out_free_intr;
+	}
+
 	for (i = 0; i < enic->rq_count; i++) {
 		err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
 		if (err) {
 			printk(KERN_ERR PFX
 				"%s: Unable to alloc receive buffers.\n",
 				netdev->name);
-			return err;
+			goto err_out_notify_unset;
 		}
 	}
 
@@ -1278,6 +1293,13 @@ static int enic_open(struct net_device *netdev)
 	enic_notify_timer_start(enic);
 
 	return 0;
+
+err_out_notify_unset:
+	vnic_dev_notify_unset(enic->vdev);
+err_out_free_intr:
+	enic_free_intr(enic);
+
+	return err;
 }
 
 /* rtnl lock is held, process context */
@@ -1307,6 +1329,9 @@ static int enic_stop(struct net_device *netdev)
 			return err;
 	}
 
+	vnic_dev_notify_unset(enic->vdev);
+	enic_free_intr(enic);
+
 	(void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
 		-1, enic_rq_service_drop, NULL);
 	(void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
@@ -1592,18 +1617,6 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 		return -ENOMEM;
 	}
 
-	/* Set the netdev name early so intr vectors are properly
-	 * named and any error msgs can include netdev->name
-	 */
-
-	rtnl_lock();
-	err = dev_alloc_name(netdev, netdev->name);
-	rtnl_unlock();
-	if (err < 0) {
-		printk(KERN_ERR PFX "Unable to allocate netdev name.\n");
-		goto err_out_free_netdev;
-	}
-
 	pci_set_drvdata(pdev, netdev);
 
 	SET_NETDEV_DEV(netdev, &pdev->dev);
@@ -1618,16 +1631,14 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = pci_enable_device(pdev);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Cannot enable PCI device, aborting.\n",
-			netdev->name);
+			"Cannot enable PCI device, aborting.\n");
 		goto err_out_free_netdev;
 	}
 
 	err = pci_request_regions(pdev, DRV_NAME);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Cannot request PCI regions, aborting.\n",
-			netdev->name);
+			"Cannot request PCI regions, aborting.\n");
 		goto err_out_disable_device;
 	}
 
@@ -1643,25 +1654,22 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 		err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 		if (err) {
 			printk(KERN_ERR PFX
-				"%s: No usable DMA configuration, aborting.\n",
-				netdev->name);
+				"No usable DMA configuration, aborting.\n");
 			goto err_out_release_regions;
 		}
 		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 		if (err) {
 			printk(KERN_ERR PFX
-				"%s: Unable to obtain 32-bit DMA "
-				"for consistent allocations, aborting.\n",
-				netdev->name);
+				"Unable to obtain 32-bit DMA "
+				"for consistent allocations, aborting.\n");
 			goto err_out_release_regions;
 		}
 	} else {
 		err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
 		if (err) {
 			printk(KERN_ERR PFX
-				"%s: Unable to obtain 40-bit DMA "
-				"for consistent allocations, aborting.\n",
-				netdev->name);
+				"Unable to obtain 40-bit DMA "
+				"for consistent allocations, aborting.\n");
 			goto err_out_release_regions;
 		}
 		using_dac = 1;
@@ -1672,8 +1680,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 
 	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
 		printk(KERN_ERR PFX
-			"%s: BAR0 not memory-map'able, aborting.\n",
-			netdev->name);
+			"BAR0 not memory-map'able, aborting.\n");
 		err = -ENODEV;
 		goto err_out_release_regions;
 	}
@@ -1684,8 +1691,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 
 	if (!enic->bar0.vaddr) {
 		printk(KERN_ERR PFX
-			"%s: Cannot memory-map BAR0 res hdr, aborting.\n",
-			netdev->name);
+			"Cannot memory-map BAR0 res hdr, aborting.\n");
 		err = -ENODEV;
 		goto err_out_release_regions;
 	}
@@ -1696,8 +1702,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
 	if (!enic->vdev) {
 		printk(KERN_ERR PFX
-			"%s: vNIC registration failed, aborting.\n",
-			netdev->name);
+			"vNIC registration failed, aborting.\n");
 		err = -ENODEV;
 		goto err_out_iounmap;
 	}
@@ -1708,8 +1713,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = enic_dev_open(enic);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: vNIC dev open failed, aborting.\n",
-			netdev->name);
+			"vNIC dev open failed, aborting.\n");
 		goto err_out_vnic_unregister;
 	}
 
@@ -1726,8 +1730,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = vnic_dev_init(enic->vdev, 0);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: vNIC dev init failed, aborting.\n",
-			netdev->name);
+			"vNIC dev init failed, aborting.\n");
 		goto err_out_dev_close;
 	}
 
@@ -1737,8 +1740,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = enic_get_vnic_config(enic);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Get vNIC configuration failed, aborting.\n",
-			netdev->name);
+			"Get vNIC configuration failed, aborting.\n");
 		goto err_out_dev_close;
 	}
 
@@ -1754,18 +1756,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = enic_set_intr_mode(enic);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Failed to set intr mode, aborting.\n",
-			netdev->name);
-		goto err_out_dev_close;
-	}
-
-	/* Request interrupt vector(s)
-	*/
-
-	err = enic_request_intr(enic);
-	if (err) {
-		printk(KERN_ERR PFX "%s: Unable to request irq.\n",
-			netdev->name);
+			"Failed to set intr mode, aborting.\n");
 		goto err_out_dev_close;
 	}
 
@@ -1775,8 +1766,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = enic_alloc_vnic_resources(enic);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Failed to alloc vNIC resources, aborting.\n",
-			netdev->name);
+			"Failed to alloc vNIC resources, aborting.\n");
 		goto err_out_free_vnic_resources;
 	}
 
@@ -1792,19 +1782,7 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 		ig_vlan_strip_en);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Failed to config nic, aborting.\n",
-			netdev->name);
-		goto err_out_free_vnic_resources;
-	}
-
-	/* Setup notification buffer area
-	 */
-
-	err = enic_notify_set(enic);
-	if (err) {
-		printk(KERN_ERR PFX
-			"%s: Failed to alloc notify buffer, aborting.\n",
-			netdev->name);
+			"Failed to config nic, aborting.\n");
 		goto err_out_free_vnic_resources;
 	}
 
@@ -1831,9 +1809,8 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = enic_set_mac_addr(netdev, enic->mac_addr);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Invalid MAC address, aborting.\n",
-			netdev->name);
-		goto err_out_notify_unset;
+			"Invalid MAC address, aborting.\n");
+		goto err_out_free_vnic_resources;
 	}
 
 	netdev->open = enic_open;
@@ -1887,18 +1864,14 @@ static int __devinit enic_probe(struct pci_dev *pdev,
 	err = register_netdev(netdev);
 	if (err) {
 		printk(KERN_ERR PFX
-			"%s: Cannot register net device, aborting.\n",
-			netdev->name);
-		goto err_out_notify_unset;
+			"Cannot register net device, aborting.\n");
+		goto err_out_free_vnic_resources;
 	}
 
 	return 0;
 
-err_out_notify_unset:
-	vnic_dev_notify_unset(enic->vdev);
 err_out_free_vnic_resources:
 	enic_free_vnic_resources(enic);
-	enic_free_intr(enic);
 err_out_dev_close:
 	vnic_dev_close(enic->vdev);
 err_out_vnic_unregister:
@@ -1926,9 +1899,7 @@ static void __devexit enic_remove(struct pci_dev *pdev)
 
 		flush_scheduled_work();
 		unregister_netdev(netdev);
-		vnic_dev_notify_unset(enic->vdev);
 		enic_free_vnic_resources(enic);
-		enic_free_intr(enic);
 		vnic_dev_close(enic->vdev);
 		enic_clear_intr_mode(enic);
 		vnic_dev_unregister(enic->vdev);