1 files changed, 195 insertions, 104 deletions

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index f5caf4419243..e35e66ffa782 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1,7 +1,7 @@
 /*******************************************************************************
  *
  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
- * Copyright(c) 2013 Intel Corporation.
+ * Copyright(c) 2013 - 2014 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -31,10 +31,10 @@ char i40evf_driver_name[] = "i40evf";
 static const char i40evf_driver_string[] =
 	"Intel(R) XL710 X710 Virtual Function Network Driver";
 
-#define DRV_VERSION "0.9.11"
+#define DRV_VERSION "0.9.16"
 const char i40evf_driver_version[] = DRV_VERSION;
 static const char i40evf_copyright[] =
-	"Copyright (c) 2013 Intel Corporation.";
+	"Copyright (c) 2013 - 2014 Intel Corporation.";
 
 /* i40evf_pci_tbl - PCI Device ID Table
  *
@@ -167,9 +167,11 @@ static void i40evf_tx_timeout(struct net_device *netdev)
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 
 	adapter->tx_timeout_count++;
-
-	/* Do the reset outside of interrupt context */
-	schedule_work(&adapter->reset_task);
+	dev_info(&adapter->pdev->dev, "TX timeout detected.\n");
+	if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
+		adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
+		schedule_work(&adapter->reset_task);
+	}
 }
 
 /**
@@ -211,6 +213,9 @@ static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 	int i;
 	struct i40e_hw *hw = &adapter->hw;
 
+	if (!adapter->msix_entries)
+		return;
+
 	for (i = 1; i < adapter->num_msix_vectors; i++) {
 		wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 		synchronize_irq(adapter->msix_entries[i].vector);
@@ -511,12 +516,14 @@ static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 	struct net_device *netdev = adapter->netdev;
 	int err;
 
-	sprintf(adapter->name[0], "i40evf:mbx");
+	sprintf(adapter->misc_vector_name, "i40evf:mbx");
 	err = request_irq(adapter->msix_entries[0].vector,
-			  &i40evf_msix_aq, 0, adapter->name[0], netdev);
+			  &i40evf_msix_aq, 0,
+			  adapter->misc_vector_name, netdev);
 	if (err) {
 		dev_err(&adapter->pdev->dev,
-			"request_irq for msix_aq failed: %d\n", err);
+			"request_irq for %s failed: %d\n",
+			adapter->misc_vector_name, err);
 		free_irq(adapter->msix_entries[0].vector, netdev);
 	}
 	return err;
@@ -963,16 +970,23 @@ void i40evf_down(struct i40evf_adapter *adapter)
 	struct net_device *netdev = adapter->netdev;
 	struct i40evf_mac_filter *f;
 
-	/* remove all MAC filters from the VSI */
+	/* remove all MAC filters */
 	list_for_each_entry(f, &adapter->mac_filter_list, list) {
 		f->remove = true;
 	}
-	adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
-	/* disable receives */
-	adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
-	mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
-	msleep(20);
-
+	/* remove all VLAN filters */
+	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
+		f->remove = true;
+	}
+	if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
+	    adapter->state != __I40EVF_RESETTING) {
+		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
+		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
+		/* disable receives */
+		adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
+		mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
+		msleep(20);
+	}
 	netif_tx_disable(netdev);
 
 	netif_tx_stop_all_queues(netdev);
@@ -1124,8 +1138,8 @@ static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
 	 * than CPU's.  So let's be conservative and only ask for
 	 * (roughly) twice the number of vectors as there are CPU's.
 	 */
-	v_budget = min(pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
-	v_budget = min(v_budget, (int)adapter->vf_res->max_vectors + 1);
+	v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
+	v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
 
 	/* A failure in MSI-X entry allocation isn't fatal, but it does
 	 * mean we disable MSI-X capabilities of the adapter.
@@ -1291,19 +1305,47 @@ static void i40evf_watchdog_task(struct work_struct *work)
 					  watchdog_task);
 	struct i40e_hw *hw = &adapter->hw;
 
-	if (adapter->state < __I40EVF_DOWN)
+	if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
+		goto restart_watchdog;
+
+	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
+		dev_info(&adapter->pdev->dev, "Checking for redemption\n");
+		if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
+			/* A chance for redemption! */
+			dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
+			adapter->state = __I40EVF_STARTUP;
+			adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
+			schedule_delayed_work(&adapter->init_task, 10);
+			clear_bit(__I40EVF_IN_CRITICAL_TASK,
+				  &adapter->crit_section);
+			/* Don't reschedule the watchdog, since we've restarted
+			 * the init task. When init_task contacts the PF and
+			 * gets everything set up again, it'll restart the
+			 * watchdog for us. Down, boy. Sit. Stay. Woof.
+			 */
+			return;
+		}
+		adapter->aq_pending = 0;
+		adapter->aq_required = 0;
+		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 		goto watchdog_done;
+	}
 
-	if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
+	if ((adapter->state < __I40EVF_DOWN) ||
+	    (adapter->flags & I40EVF_FLAG_RESET_PENDING))
 		goto watchdog_done;
 
-	/* check for unannounced reset */
-	if ((adapter->state != __I40EVF_RESETTING) &&
+	/* check for reset */
+	if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
 	    (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
 		adapter->state = __I40EVF_RESETTING;
+		adapter->flags |= I40EVF_FLAG_RESET_PENDING;
+		dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
+		dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
 		schedule_work(&adapter->reset_task);
-		dev_info(&adapter->pdev->dev, "%s: hardware reset detected\n",
-			 __func__);
+		adapter->aq_pending = 0;
+		adapter->aq_required = 0;
+		adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 		goto watchdog_done;
 	}
 
@@ -1358,16 +1400,25 @@ static void i40evf_watchdog_task(struct work_struct *work)
 
 	i40evf_irq_enable(adapter, true);
 	i40evf_fire_sw_int(adapter, 0xFF);
+
 watchdog_done:
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+restart_watchdog:
 	if (adapter->aq_required)
 		mod_timer(&adapter->watchdog_timer,
 			  jiffies + msecs_to_jiffies(20));
 	else
 		mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 	schedule_work(&adapter->adminq_task);
 }
 
+static int next_queue(struct i40evf_adapter *adapter, int j)
+{
+	j += 1;
+
+	return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
+}
+
 /**
  * i40evf_configure_rss - Prepare for RSS if used
  * @adapter: board private structure
@@ -1398,19 +1449,19 @@ static void i40evf_configure_rss(struct i40evf_adapter *adapter)
 	wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
 
 	/* Populate the LUT with max no. of queues in round robin fashion */
-	for (i = 0, j = 0; i < I40E_VFQF_HLUT_MAX_INDEX; i++, j++) {
-		if (j == adapter->vsi_res->num_queue_pairs)
-			j = 0;
-		/* lut = 4-byte sliding window of 4 lut entries */
-		lut = (lut << 8) | (j &
-			 ((0x1 << 8) - 1));
-		/* On i = 3, we have 4 entries in lut; write to the register */
-		if ((i & 3) == 3)
-			wr32(hw, I40E_VFQF_HLUT(i >> 2), lut);
+	j = adapter->vsi_res->num_queue_pairs;
+	for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
+		lut = next_queue(adapter, j);
+		lut |= next_queue(adapter, j) << 8;
+		lut |= next_queue(adapter, j) << 16;
+		lut |= next_queue(adapter, j) << 24;
+		wr32(hw, I40E_VFQF_HLUT(i), lut);
 	}
 	i40e_flush(hw);
 }
 
+#define I40EVF_RESET_WAIT_MS 100
+#define I40EVF_RESET_WAIT_COUNT 200
 /**
  * i40evf_reset_task - Call-back task to handle hardware reset
  * @work: pointer to work_struct
@@ -1421,8 +1472,9 @@ static void i40evf_configure_rss(struct i40evf_adapter *adapter)
  **/
 static void i40evf_reset_task(struct work_struct *work)
 {
-	struct i40evf_adapter *adapter =
-			container_of(work, struct i40evf_adapter, reset_task);
+	struct i40evf_adapter *adapter = container_of(work,
+						      struct i40evf_adapter,
+						      reset_task);
 	struct i40e_hw *hw = &adapter->hw;
 	int i = 0, err;
 	uint32_t rstat_val;
@@ -1431,21 +1483,61 @@ static void i40evf_reset_task(struct work_struct *work)
 				&adapter->crit_section))
 		udelay(500);
 
-	/* wait until the reset is complete */
-	for (i = 0; i < 20; i++) {
+	if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
+		dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
+		i40evf_request_reset(adapter);
+	}
+
+	/* poll until we see the reset actually happen */
+	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
 		rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
 			    I40E_VFGEN_RSTAT_VFR_STATE_MASK;
-		if (rstat_val == I40E_VFR_COMPLETED)
+		if (rstat_val != I40E_VFR_VFACTIVE) {
+			dev_info(&adapter->pdev->dev, "Reset now occurring\n");
 			break;
-		else
-			mdelay(100);
+		} else {
+			msleep(I40EVF_RESET_WAIT_MS);
+		}
+	}
+	if (i == I40EVF_RESET_WAIT_COUNT) {
+		dev_err(&adapter->pdev->dev, "Reset was not detected\n");
+		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
+		goto continue_reset; /* act like the reset happened */
+	}
+
+	/* wait until the reset is complete and the PF is responding to us */
+	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
+		rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
+			    I40E_VFGEN_RSTAT_VFR_STATE_MASK;
+		if (rstat_val == I40E_VFR_VFACTIVE) {
+			dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
+			break;
+		} else {
+			msleep(I40EVF_RESET_WAIT_MS);
+		}
 	}
-	if (i == 20) {
+	if (i == I40EVF_RESET_WAIT_COUNT) {
 		/* reset never finished */
-		dev_info(&adapter->pdev->dev, "%s: reset never finished: %x\n",
-			__func__, rstat_val);
-		/* carry on anyway */
+		dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
+			rstat_val);
+		adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
+
+		if (netif_running(adapter->netdev))
+			i40evf_close(adapter->netdev);
+
+		i40evf_free_misc_irq(adapter);
+		i40evf_reset_interrupt_capability(adapter);
+		i40evf_free_queues(adapter);
+		kfree(adapter->vf_res);
+		i40evf_shutdown_adminq(hw);
+		adapter->netdev->flags &= ~IFF_UP;
+		clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+		return; /* Do not attempt to reinit. It's dead, Jim. */
 	}
+
+continue_reset:
+	adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
+
 	i40evf_down(adapter);
 	adapter->state = __I40EVF_RESETTING;
 
@@ -1505,6 +1597,9 @@ static void i40evf_adminq_task(struct work_struct *work)
 	i40e_status ret;
 	u16 pending;
 
+	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
+		return;
+
 	event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
 	event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
 	if (!event.msg_buf) {
@@ -1636,6 +1731,10 @@ static int i40evf_open(struct net_device *netdev)
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 	int err;
 
+	if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
+		dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
+		return -EIO;
+	}
 	if (adapter->state != __I40EVF_DOWN)
 		return -EBUSY;
 
@@ -1690,8 +1789,12 @@ static int i40evf_close(struct net_device *netdev)
 {
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 
+	if (adapter->state <= __I40EVF_DOWN)
+		return 0;
+
 	/* signal that we are down to the interrupt handler */
 	adapter->state = __I40EVF_DOWN;
+
 	set_bit(__I40E_DOWN, &adapter->vsi.state);
 
 	i40evf_down(adapter);
@@ -1842,16 +1945,18 @@ static void i40evf_init_task(struct work_struct *work)
 	switch (adapter->state) {
 	case __I40EVF_STARTUP:
 		/* driver loaded, probe complete */
+		adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
+		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
 		err = i40e_set_mac_type(hw);
 		if (err) {
-			dev_info(&pdev->dev, "%s: set_mac_type failed: %d\n",
-				__func__, err);
+			dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
+				err);
 		goto err;
 		}
 		err = i40evf_check_reset_complete(hw);
 		if (err) {
-			dev_info(&pdev->dev, "%s: device is still in reset (%d).\n",
-				__func__, err);
+			dev_err(&pdev->dev, "Device is still in reset (%d)\n",
+				err);
 			goto err;
 		}
 		hw->aq.num_arq_entries = I40EVF_AQ_LEN;
@@ -1861,14 +1966,13 @@ static void i40evf_init_task(struct work_struct *work)
 
 		err = i40evf_init_adminq(hw);
 		if (err) {
-			dev_info(&pdev->dev, "%s: init_adminq failed: %d\n",
-				__func__, err);
+			dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
+				err);
 			goto err;
 		}
 		err = i40evf_send_api_ver(adapter);
 		if (err) {
-			dev_info(&pdev->dev, "%s: unable to send to PF (%d)\n",
-				__func__, err);
+			dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
 			i40evf_shutdown_adminq(hw);
 			goto err;
 		}
@@ -1876,19 +1980,21 @@ static void i40evf_init_task(struct work_struct *work)
 		goto restart;
 		break;
 	case __I40EVF_INIT_VERSION_CHECK:
-		if (!i40evf_asq_done(hw))
+		if (!i40evf_asq_done(hw)) {
+			dev_err(&pdev->dev, "Admin queue command never completed.\n");
 			goto err;
+		}
 
 		/* aq msg sent, awaiting reply */
 		err = i40evf_verify_api_ver(adapter);
 		if (err) {
-			dev_err(&pdev->dev, "Unable to verify API version, error %d\n",
+			dev_err(&pdev->dev, "Unable to verify API version (%d)\n",
 				err);
 			goto err;
 		}
 		err = i40evf_send_vf_config_msg(adapter);
 		if (err) {
-			dev_err(&pdev->dev, "Unable send config request, error %d\n",
+			dev_err(&pdev->dev, "Unable send config request (%d)\n",
 				err);
 			goto err;
 		}
@@ -1902,18 +2008,15 @@ static void i40evf_init_task(struct work_struct *work)
 				(I40E_MAX_VF_VSI *
 				 sizeof(struct i40e_virtchnl_vsi_resource));
 			adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
-			if (!adapter->vf_res) {
-				dev_err(&pdev->dev, "%s: unable to allocate memory\n",
-					__func__);
+			if (!adapter->vf_res)
 				goto err;
-			}
 		}
 		err = i40evf_get_vf_config(adapter);
 		if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
 			goto restart;
 		if (err) {
-			dev_info(&pdev->dev, "%s: unable to get VF config (%d)\n",
-				__func__, err);
+			dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
+				err);
 			goto err_alloc;
 		}
 		adapter->state = __I40EVF_INIT_SW;
@@ -1927,25 +2030,23 @@ static void i40evf_init_task(struct work_struct *work)
 			adapter->vsi_res = &adapter->vf_res->vsi_res[i];
 	}
 	if (!adapter->vsi_res) {
-		dev_info(&pdev->dev, "%s: no LAN VSI found\n", __func__);
+		dev_err(&pdev->dev, "No LAN VSI found\n");
 		goto err_alloc;
 	}
 
 	adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
 
-	adapter->txd_count = I40EVF_DEFAULT_TXD;
-	adapter->rxd_count = I40EVF_DEFAULT_RXD;
-
 	netdev->netdev_ops = &i40evf_netdev_ops;
 	i40evf_set_ethtool_ops(netdev);
 	netdev->watchdog_timeo = 5 * HZ;
-
-	netdev->features |= NETIF_F_SG |
+	netdev->features |= NETIF_F_HIGHDMA |
+			    NETIF_F_SG |
 			    NETIF_F_IP_CSUM |
 			    NETIF_F_SCTP_CSUM |
 			    NETIF_F_IPV6_CSUM |
 			    NETIF_F_TSO |
 			    NETIF_F_TSO6 |
+			    NETIF_F_RXCSUM |
 			    NETIF_F_GRO;
 
 	if (adapter->vf_res->vf_offload_flags
@@ -1956,11 +2057,13 @@ static void i40evf_init_task(struct work_struct *work)
 				    NETIF_F_HW_VLAN_CTAG_FILTER;
 	}
 
-	/* The HW MAC address was set and/or determined in sw_init */
+	/* copy netdev features into list of user selectable features */
+	netdev->hw_features |= netdev->features;
+	netdev->hw_features &= ~NETIF_F_RXCSUM;
+
 	if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
-		dev_info(&pdev->dev,
-			"Invalid MAC address %pMAC, using random\n",
-			adapter->hw.mac.addr);
+		dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
+			 adapter->hw.mac.addr);
 		random_ether_addr(adapter->hw.mac.addr);
 	}
 	memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
@@ -1994,8 +2097,6 @@ static void i40evf_init_task(struct work_struct *work)
 
 	netif_carrier_off(netdev);
 
-	strcpy(netdev->name, "eth%d");
-
 	adapter->vsi.id = adapter->vsi_res->vsi_id;
 	adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
 	adapter->vsi.back = adapter;
@@ -2005,9 +2106,11 @@ static void i40evf_init_task(struct work_struct *work)
 	adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
 	adapter->vsi.netdev = adapter->netdev;
 
-	err = register_netdev(netdev);
-	if (err)
-		goto err_register;
+	if (!adapter->netdev_registered) {
+		err = register_netdev(netdev);
+		if (err)
+			goto err_register;
+	}
 
 	adapter->netdev_registered = true;
 
@@ -2031,7 +2134,6 @@ err_register:
 	i40evf_free_misc_irq(adapter);
 err_sw_init:
 	i40evf_reset_interrupt_capability(adapter);
-	adapter->state = __I40EVF_FAILED;
 err_alloc:
 	kfree(adapter->vf_res);
 	adapter->vf_res = NULL;
@@ -2039,9 +2141,7 @@ err:
 	/* Things went into the weeds, so try again later */
 	if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
 		dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
-		if (hw->aq.asq.count)
-			i40evf_shutdown_adminq(hw); /* ignore error */
-		adapter->state = __I40EVF_FAILED;
+		adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
 		return; /* do not reschedule */
 	}
 	schedule_delayed_work(&adapter->init_task, HZ * 3);
@@ -2084,26 +2184,20 @@ static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct net_device *netdev;
 	struct i40evf_adapter *adapter = NULL;
 	struct i40e_hw *hw = NULL;
-	int err, pci_using_dac;
+	int err;
 
 	err = pci_enable_device(pdev);
 	if (err)
 		return err;
 
-	if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
-		pci_using_dac = true;
-		/* coherent mask for the same size will always succeed if
-		 * dma_set_mask does
-		 */
-		dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
-	} else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
-		pci_using_dac = false;
-		dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
-	} else {
-		dev_err(&pdev->dev, "%s: DMA configuration failed: %d\n",
-			 __func__, err);
-		err = -EIO;
-		goto err_dma;
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+		if (err) {
+			dev_err(&pdev->dev,
+				"DMA configuration failed: 0x%x\n", err);
+			goto err_dma;
+		}
 	}
 
 	err = pci_request_regions(pdev, i40evf_driver_name);
@@ -2128,8 +2222,6 @@ static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	pci_set_drvdata(pdev, netdev);
 	adapter = netdev_priv(netdev);
-	if (pci_using_dac)
-		netdev->features |= NETIF_F_HIGHDMA;
 
 	adapter->netdev = netdev;
 	adapter->pdev = pdev;
@@ -2271,6 +2363,7 @@ static void i40evf_remove(struct pci_dev *pdev)
 	struct i40e_hw *hw = &adapter->hw;
 
 	cancel_delayed_work_sync(&adapter->init_task);
+	cancel_work_sync(&adapter->reset_task);
 
 	if (adapter->netdev_registered) {
 		unregister_netdev(netdev);
@@ -2278,17 +2371,15 @@ static void i40evf_remove(struct pci_dev *pdev)
 	}
 	adapter->state = __I40EVF_REMOVE;
 
-	if (adapter->num_msix_vectors) {
+	if (adapter->msix_entries) {
 		i40evf_misc_irq_disable(adapter);
-		del_timer_sync(&adapter->watchdog_timer);
-
-		flush_scheduled_work();
-
 		i40evf_free_misc_irq(adapter);
-
 		i40evf_reset_interrupt_capability(adapter);
 	}
 
+	del_timer_sync(&adapter->watchdog_timer);
+	flush_scheduled_work();
+
 	if (hw->aq.asq.count)
 		i40evf_shutdown_adminq(hw);