RESEND [PATCH 1/3] NetXen: Fix issue of MSI not working correctly

NetXen driver uses PCI function 0 to provide the functionality of MSI.
The patch makes driver check the bus master bit for function 0 and
enable it after the card initialization.

Signed-off-by: Dhananjay Phadke<dhananjay@netxen.com>
Signed-off-by: Milan Bag <mbag@netxen.com>
Signed-off-by: Wen Xiong <wenxiong@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/netxen/netxen_nic_main.c

@@ -336,11 +336,9 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (pci_using_dac)
 		netdev->features |= NETIF_F_HIGHDMA;
 
-	if (pci_enable_msi(pdev)) {
+	if (pci_enable_msi(pdev))
 		adapter->flags &= ~NETXEN_NIC_MSI_ENABLED;
-		printk(KERN_WARNING "%s: unable to allocate MSI interrupt"
-		       " error\n", netxen_nic_driver_name);
-	} else
+	else
 		adapter->flags |= NETXEN_NIC_MSI_ENABLED;
 
 	netdev->irq = pdev->irq;
@@ -355,13 +353,6 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* initialize the adapter */
 	netxen_initialize_adapter_hw(adapter);
 
-#ifdef CONFIG_PPC
-	if ((adapter->ahw.boardcfg.board_type ==
-		NETXEN_BRDTYPE_P2_SB31_10G_IMEZ) &&
-			(pci_func_id == 2))
-		    goto err_out_free_adapter;
-#endif /* CONFIG_PPC */
-
 	/*
 	 *  Adapter in our case is quad port so initialize it before
 	 *  initializing the ports
@@ -509,6 +500,12 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 					NETXEN_CAM_RAM(0x1fc)));
 		if (val == 0x55555555) {
 		    /* This is the first boot after power up */
+		    netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
+		    if (!(val & 0x4)) {
+			val |= 0x4;
+			netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
+			netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
+		    }
 		    val = readl(NETXEN_CRB_NORMALIZE(adapter,
 					NETXEN_ROMUSB_GLB_SW_RESET));
 		    printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);