diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 9737eae..cd665da 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -149,33 +149,31 @@
 
 #define	ADAPTER_LIST_SIZE 12
 
+static uint32_t msi_tgt_status[4] = {
+	ISR_INT_TARGET_STATUS, ISR_INT_TARGET_STATUS_F1,
+	ISR_INT_TARGET_STATUS_F2, ISR_INT_TARGET_STATUS_F3
+};
+
+static uint32_t sw_int_mask[4] = {
+	CRB_SW_INT_MASK_0, CRB_SW_INT_MASK_1,
+	CRB_SW_INT_MASK_2, CRB_SW_INT_MASK_3
+};
+
 static void netxen_nic_disable_int(struct netxen_adapter *adapter)
 {
-	uint32_t	mask = 0x7ff;
+	u32 mask = 0x7ff;
 	int retries = 32;
+	int port = adapter->portnum;
+	int pci_fn = adapter->ahw.pci_func;
 
-	DPRINTK(1, INFO, "Entered ISR Disable \n");
-
-	switch (adapter->portnum) {
-	case 0:
-		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
-		break;
-	case 1:
-		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
-		break;
-	case 2:
-		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
-		break;
-	case 3:
-		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
-		break;
+	if (adapter->msi_mode != MSI_MODE_MULTIFUNC) {
+		writel(0x0, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
 	}
 
 	if (adapter->intr_scheme != -1 &&
 	    adapter->intr_scheme != INTR_SCHEME_PERPORT)
 		writel(mask,PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
 
-	/* Window = 0 or 1 */
 	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
 		do {
 			writel(0xffffffff,
@@ -190,14 +188,18 @@
 			printk(KERN_NOTICE "%s: Failed to disable interrupt completely\n",
 					netxen_nic_driver_name);
 		}
+	} else {
+		if (adapter->msi_mode == MSI_MODE_MULTIFUNC) {
+			writel(0xffffffff, PCI_OFFSET_SECOND_RANGE(adapter,
+						msi_tgt_status[pci_fn]));
+		}
 	}
-
-	DPRINTK(1, INFO, "Done with Disable Int\n");
 }
 
 static void netxen_nic_enable_int(struct netxen_adapter *adapter)
 {
 	u32 mask;
+	int port = adapter->portnum;
 
 	DPRINTK(1, INFO, "Entered ISR Enable \n");
 
@@ -218,20 +220,7 @@
 		writel(mask, PCI_OFFSET_SECOND_RANGE(adapter, ISR_INT_MASK));
 	}
 
-	switch (adapter->portnum) {
-	case 0:
-		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_0));
-		break;
-	case 1:
-		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_1));
-		break;
-	case 2:
-		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_2));
-		break;
-	case 3:
-		writel(0x1, NETXEN_CRB_NORMALIZE(adapter, CRB_SW_INT_MASK_3));
-		break;
-	}
+	writel(0x1, NETXEN_CRB_NORMALIZE(adapter, sw_int_mask[port]));
 
 	if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
 		mask = 0xbff;
@@ -401,6 +390,7 @@
 
 	/* this will be read from FW later */
 	adapter->intr_scheme = -1;
+	adapter->msi_mode = -1;
 
 	/* This will be reset for mezz cards  */
 	adapter->portnum = pci_func_id;