netxen: fix crashes during module unload

This patch fixes two problems during driver unload. The pci_disable_device()
call is before firmware reload, causing reads and writes across PCI bus after
disabling device. Second problem is the register window was wrong during
firmware reload

Signed-off by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/netxen/netxen_nic_hdr.h

@@ -649,9 +649,11 @@ enum {
 #define PCIX_INT_VECTOR		(0x10100)
 #define PCIX_INT_MASK		(0x10104)
 
-#define PCIX_MN_WINDOW		(0x10200)
+#define PCIX_MN_WINDOW_F0	(0x10200)
+#define PCIX_MN_WINDOW(_f)	(PCIX_MN_WINDOW_F0 + (0x20 * (_f)))
 #define PCIX_MS_WINDOW		(0x10204)
-#define PCIX_SN_WINDOW		(0x10208)
+#define PCIX_SN_WINDOW_F0	(0x10208)
+#define PCIX_SN_WINDOW(_f)	(PCIX_SN_WINDOW_F0 + (0x20 * (_f)))
 #define PCIX_CRB_WINDOW		(0x10210)
 #define PCIX_CRB_WINDOW_F0	(0x10210)
 #define PCIX_CRB_WINDOW_F1	(0x10230)

drivers/net/netxen/netxen_nic_hw.c

@@ -904,11 +904,11 @@ netxen_nic_pci_set_window(struct netxen_adapter *adapter,
 			ddr_mn_window = window;
 			writel(window, PCI_OFFSET_SECOND_RANGE(adapter,
 							       NETXEN_PCIX_PH_REG
-							       (PCIX_MN_WINDOW)));
+							       (PCIX_MN_WINDOW(adapter->ahw.pci_func))));
 			/* MUST make sure window is set before we forge on... */
 			readl(PCI_OFFSET_SECOND_RANGE(adapter,
 						      NETXEN_PCIX_PH_REG
-						      (PCIX_MN_WINDOW)));
+						      (PCIX_MN_WINDOW(adapter->ahw.pci_func))));
 		}
 		addr -= (window * NETXEN_WINDOW_ONE);
 		addr += NETXEN_PCI_DDR_NET;
@@ -929,11 +929,11 @@ netxen_nic_pci_set_window(struct netxen_adapter *adapter,
 			writel((window << 22),
 			       PCI_OFFSET_SECOND_RANGE(adapter,
 						       NETXEN_PCIX_PH_REG
-						       (PCIX_SN_WINDOW)));
+						       (PCIX_SN_WINDOW(adapter->ahw.pci_func))));
 			/* MUST make sure window is set before we forge on... */
 			readl(PCI_OFFSET_SECOND_RANGE(adapter,
 						      NETXEN_PCIX_PH_REG
-						      (PCIX_SN_WINDOW)));
+						      (PCIX_SN_WINDOW(adapter->ahw.pci_func))));
 		}
 		addr -= (window * 0x400000);
 		addr += NETXEN_PCI_QDR_NET;

drivers/net/netxen/netxen_nic_main.c

@@ -746,9 +746,6 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
 
 	netxen_nic_disable_int(adapter);
 
-	if (adapter->irq)
-		free_irq(adapter->irq, adapter);
-
 	if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
 		init_firmware_done++;
 		netxen_free_hw_resources(adapter);
@@ -772,13 +769,8 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
 		}
 	}
 
-	if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
-		pci_disable_msi(pdev);
-
 	vfree(adapter->cmd_buf_arr);
 
-	pci_disable_device(pdev);
-
 	if (adapter->portnum == 0) {
 		if (init_firmware_done) {
 			i = 100;
@@ -829,12 +821,19 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
 		}
 	}
 
+	if (adapter->irq)
+		free_irq(adapter->irq, adapter);
+
+	if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
+		pci_disable_msi(pdev);
+
 	iounmap(adapter->ahw.db_base);
 	iounmap(adapter->ahw.pci_base0);
 	iounmap(adapter->ahw.pci_base1);
 	iounmap(adapter->ahw.pci_base2);
 
 	pci_release_regions(pdev);
+	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
 
 	free_netdev(netdev);