diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index e04a8e4..ed9836f 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -120,6 +120,7 @@ struct vf_data_storage {
 	u16 pf_vlan; /* When set, guest VLAN config not allowed. */
 	u16 pf_qos;
 	u16 tx_rate;
+	struct pci_dev *vfdev;
 };
 
 struct vf_macvlans {
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 1be6175..06ba9f2 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -160,41 +160,6 @@ MODULE_VERSION(DRV_VERSION);
 
 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 
-static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
-{
-	struct ixgbe_hw *hw = &adapter->hw;
-	u32 gcr;
-	u32 gpie;
-	u32 vmdctl;
-
-#ifdef CONFIG_PCI_IOV
-	/* disable iov and allow time for transactions to clear */
-	pci_disable_sriov(adapter->pdev);
-#endif
-
-	/* turn off device IOV mode */
-	gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
-	gcr &= ~(IXGBE_GCR_EXT_SRIOV);
-	IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
-	gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
-	gpie &= ~IXGBE_GPIE_VTMODE_MASK;
-	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
-
-	/* set default pool back to 0 */
-	vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
-	vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
-	IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
-
-	/* take a breather then clean up driver data */
-	msleep(100);
-
-	kfree(adapter->vfinfo);
-	adapter->vfinfo = NULL;
-
-	adapter->num_vfs = 0;
-	adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
-}
-
 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
 {
 	if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
@@ -7237,11 +7202,8 @@ static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
 {
 #ifdef CONFIG_PCI_IOV
 	struct ixgbe_hw *hw = &adapter->hw;
-	int err;
-	int num_vf_macvlans, i;
-	struct vf_macvlans *mv_list;
 
-	if (hw->mac.type == ixgbe_mac_82598EB || !max_vfs)
+	if (hw->mac.type == ixgbe_mac_82598EB)
 		return;
 
 	/* The 82599 supports up to 64 VFs per physical function
@@ -7250,60 +7212,7 @@ static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
 	 * physical function
 	 */
 	adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
-	adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
-	err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
-	if (err) {
-		e_err(probe, "Failed to enable PCI sriov: %d\n", err);
-		goto err_novfs;
-	}
-
-	num_vf_macvlans = hw->mac.num_rar_entries -
-		(IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
-
-	adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
-					     sizeof(struct vf_macvlans),
-					     GFP_KERNEL);
-	if (mv_list) {
-		/* Initialize list of VF macvlans */
-		INIT_LIST_HEAD(&adapter->vf_mvs.l);
-		for (i = 0; i < num_vf_macvlans; i++) {
-			mv_list->vf = -1;
-			mv_list->free = true;
-			mv_list->rar_entry = hw->mac.num_rar_entries -
-				(i + adapter->num_vfs + 1);
-			list_add(&mv_list->l, &adapter->vf_mvs.l);
-			mv_list++;
-		}
-	}
-
-	/* If call to enable VFs succeeded then allocate memory
-	 * for per VF control structures.
-	 */
-	adapter->vfinfo =
-		kcalloc(adapter->num_vfs,
-			sizeof(struct vf_data_storage), GFP_KERNEL);
-	if (adapter->vfinfo) {
-		/* Now that we're sure SR-IOV is enabled
-		 * and memory allocated set up the mailbox parameters
-		 */
-		ixgbe_init_mbx_params_pf(hw);
-		memcpy(&hw->mbx.ops, ii->mbx_ops,
-		       sizeof(hw->mbx.ops));
-
-		/* Disable RSC when in SR-IOV mode */
-		adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
-				     IXGBE_FLAG2_RSC_ENABLED);
-		return;
-	}
-
-	/* Oh oh */
-	e_err(probe, "Unable to allocate memory for VF Data Storage - "
-	      "SRIOV disabled\n");
-	pci_disable_sriov(adapter->pdev);
-
-err_novfs:
-	adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
-	adapter->num_vfs = 0;
+	ixgbe_enable_sriov(adapter, ii);
 #endif /* CONFIG_PCI_IOV */
 }
 
@@ -7752,8 +7661,13 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev)
 	if (netdev->reg_state == NETREG_REGISTERED)
 		unregister_netdev(netdev);
 
-	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
-		ixgbe_disable_sriov(adapter);
+	if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
+		if (!(ixgbe_check_vf_assignment(adapter)))
+			ixgbe_disable_sriov(adapter);
+		else
+			e_dev_warn("Unloading driver while VFs are assigned "
+				   "- VFs will not be deallocated\n");
+	}
 
 	ixgbe_clear_interrupt_scheme(adapter);
 
diff --git a/drivers/net/ixgbe/ixgbe_sriov.c b/drivers/net/ixgbe/ixgbe_sriov.c
index d99d01e..cdb2f0c 100644
--- a/drivers/net/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ixgbe/ixgbe_sriov.c
@@ -43,6 +43,158 @@
 
 #include "ixgbe_sriov.h"
 
+static int ixgbe_find_enabled_vfs(struct ixgbe_adapter *adapter)
+{
+	struct pci_dev *pdev = adapter->pdev;
+	struct pci_dev *pvfdev;
+	u16 vf_devfn = 0;
+	int device_id;
+	int vfs_found = 0;
+
+	switch (adapter->hw.mac.type) {
+		case ixgbe_mac_82599EB:
+			device_id = IXGBE_DEV_ID_82599_VF;
+			break;
+		case ixgbe_mac_X540:
+			device_id = IXGBE_DEV_ID_X540_VF;
+			break;
+		default:
+			device_id = 0;
+			break;
+	}
+
+	vf_devfn = pdev->devfn + 0x80;
+	pvfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL);
+	while (pvfdev) {
+		if (pvfdev->devfn == vf_devfn)
+			vfs_found++;
+		vf_devfn += 2;
+		pvfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID,
+					device_id, pvfdev);
+	}
+
+	return vfs_found;
+}
+
+void ixgbe_enable_sriov(struct ixgbe_adapter *adapter,
+			 const struct ixgbe_info *ii)
+{
+	struct ixgbe_hw *hw = &adapter->hw;
+	int err = 0;
+	int num_vf_macvlans, i;
+	struct vf_macvlans *mv_list;
+	int pre_existing_vfs = 0;
+
+	pre_existing_vfs = ixgbe_find_enabled_vfs(adapter);
+	if (!pre_existing_vfs && !adapter->num_vfs)
+		return;
+
+	/* If there are pre-existing VFs then we have to force
+ 	 * use of that many because they were not deleted the last
+ 	 * time someone removed the PF driver.  That would have
+ 	 * been because they were allocated to guest VMs and can't
+ 	 * be removed.  Go ahead and just re-enable the old amount.
+ 	 * If the user wants to change the number of VFs they can
+ 	 * use ethtool while making sure no VFs are allocated to
+ 	 * guest VMs... i.e. the right way.
+ 	 */
+	if (pre_existing_vfs)
+		adapter->num_vfs = pre_existing_vfs;
+	else
+		err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
+	if (err) {
+		e_err(probe, "Failed to enable PCI sriov: %d\n", err);
+		goto err_novfs;
+	}
+	adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
+
+	e_info(probe, "SR-IOV enabled with %d VFs\n", adapter->num_vfs);
+
+	num_vf_macvlans = hw->mac.num_rar_entries -
+	(IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
+
+	adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
+					     sizeof(struct vf_macvlans),
+					     GFP_KERNEL);
+	if (mv_list) {
+		/* Initialize list of VF macvlans */
+		INIT_LIST_HEAD(&adapter->vf_mvs.l);
+		for (i = 0; i < num_vf_macvlans; i++) {
+			mv_list->vf = -1;
+			mv_list->free = true;
+			mv_list->rar_entry = hw->mac.num_rar_entries -
+				(i + adapter->num_vfs + 1);
+			list_add(&mv_list->l, &adapter->vf_mvs.l);
+			mv_list++;
+		}
+	}
+
+	/* If call to enable VFs succeeded then allocate memory
+	 * for per VF control structures.
+	 */
+	adapter->vfinfo =
+		kcalloc(adapter->num_vfs,
+			sizeof(struct vf_data_storage), GFP_KERNEL);
+	if (adapter->vfinfo) {
+		/* Now that we're sure SR-IOV is enabled
+		 * and memory allocated set up the mailbox parameters
+		 */
+		ixgbe_init_mbx_params_pf(hw);
+		memcpy(&hw->mbx.ops, ii->mbx_ops,
+		       sizeof(hw->mbx.ops));
+
+		/* Disable RSC when in SR-IOV mode */
+		adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
+				     IXGBE_FLAG2_RSC_ENABLED);
+		return;
+	}
+
+	/* Oh oh */
+	e_err(probe, "Unable to allocate memory for VF Data Storage - "
+	      "SRIOV disabled\n");
+	pci_disable_sriov(adapter->pdev);
+
+err_novfs:
+	adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
+	adapter->num_vfs = 0;
+}
+
+void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
+{
+	struct ixgbe_hw *hw = &adapter->hw;
+	u32 gcr;
+	u32 gpie;
+	u32 vmdctl;
+
+#ifdef CONFIG_PCI_IOV
+	/* disable iov and allow time for transactions to clear */
+	pci_disable_sriov(adapter->pdev);
+#endif
+
+	/* turn off device IOV mode */
+	gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
+	gcr &= ~(IXGBE_GCR_EXT_SRIOV);
+	IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
+	gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
+	gpie &= ~IXGBE_GPIE_VTMODE_MASK;
+	IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
+
+	/* set default pool back to 0 */
+	vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
+	vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
+	IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
+
+	/* take a breather then clean up driver data */
+	msleep(100);
+
+	kfree(adapter->vfinfo);
+	kfree(adapter->mv_list);
+	adapter->vfinfo = NULL;
+
+	adapter->num_vfs = 0;
+	adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
+}
+
 static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,
 				   int entries, u16 *hash_list, u32 vf)
 {
@@ -273,12 +425,28 @@ static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
 	return 0;
 }
 
+int ixgbe_check_vf_assignment(struct ixgbe_adapter *adapter)
+{
+	int i;
+	for (i = 0; i < adapter->num_vfs; i++) {
+		if (adapter->vfinfo[i].vfdev->dev_flags &
+			PCI_DEV_FLAGS_ASSIGNED) {
+		return true;
+		}
+	}
+	return false;
+}
+
 int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 {
 	unsigned char vf_mac_addr[6];
 	struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
 	unsigned int vfn = (event_mask & 0x3f);
-
+	struct pci_dev *pvfdev;
+	unsigned int device_id;
+	u16 thisvf_devfn = (pdev->devfn + 0x80 + (vfn << 1)) |
+				(pdev->devfn & 1);
+ 
 	bool enable = ((event_mask & 0x10000000U) != 0);
 
 	if (enable) {
@@ -290,6 +458,31 @@ int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask)
 		 * for it later.
 		 */
 		memcpy(adapter->vfinfo[vfn].vf_mac_addresses, vf_mac_addr, 6);
+
+		switch (adapter->hw.mac.type) {
+		case ixgbe_mac_82599EB:
+			device_id = IXGBE_DEV_ID_82599_VF;
+			break;
+		case ixgbe_mac_X540:
+			device_id = IXGBE_DEV_ID_X540_VF;
+			break;
+		default:
+			device_id = 0;
+			break;
+		}
+
+		pvfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL);
+		while (pvfdev) {
+			if (pvfdev->devfn == thisvf_devfn)
+				break;
+			pvfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID,
+						device_id, pvfdev);
+		}
+		if (pvfdev)
+			adapter->vfinfo[vfn].vfdev = pvfdev;
+		else
+			e_err(drv, "Couldn't find pci dev ptr for VF %4.4x\n",
+			      thisvf_devfn);
 	}
 
 	return 0;
diff --git a/drivers/net/ixgbe/ixgbe_sriov.h b/drivers/net/ixgbe/ixgbe_sriov.h
index 3417556..2781847 100644
--- a/drivers/net/ixgbe/ixgbe_sriov.h
+++ b/drivers/net/ixgbe/ixgbe_sriov.h
@@ -41,6 +41,11 @@ int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
 int ixgbe_ndo_get_vf_config(struct net_device *netdev,
 			    int vf, struct ifla_vf_info *ivi);
 void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter);
+void ixgbe_disable_sriov(struct ixgbe_adapter *adapter);
+void ixgbe_enable_sriov(struct ixgbe_adapter *adapter,
+			const struct ixgbe_info *ii);
+int ixgbe_check_vf_assignment(struct ixgbe_adapter *adapter);
+
 
 #endif /* _IXGBE_SRIOV_H_ */
 
diff --git a/drivers/net/ixgbe/ixgbe_type.h b/drivers/net/ixgbe/ixgbe_type.h
index e0d970e..648cf15 100644
--- a/drivers/net/ixgbe/ixgbe_type.h
+++ b/drivers/net/ixgbe/ixgbe_type.h
@@ -65,6 +65,10 @@
 #define IXGBE_DEV_ID_82599_LS            0x154F
 #define IXGBE_DEV_ID_X540T               0x1528
 
+/* VF Device IDs */
+#define IXGBE_DEV_ID_82599_VF           0x10ED
+#define IXGBE_DEV_ID_X540_VF            0x1515
+
 /* General Registers */
 #define IXGBE_CTRL      0x00000
 #define IXGBE_STATUS    0x00008
