---

yaml
---
r: 290442
b: refs/heads/master
c: 0184039
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 36eabda3d094dae30a74350c6289c163349b744d
+refs/heads/master: 0184039a4b6727d6efd545919c773ef141090ae7

trunk/drivers/net/ethernet/intel/e1000e/e1000.h

@@ -461,6 +461,7 @@ struct e1000_info {
 #define FLAG2_CHECK_PHY_HANG              (1 << 9)
 #define FLAG2_NO_DISABLE_RX               (1 << 10)
 #define FLAG2_PCIM2PCI_ARBITER_WA         (1 << 11)
+#define FLAG2_DFLT_CRC_STRIPPING          (1 << 12)
 
 #define E1000_RX_DESC_PS(R, i)	    \
 	(&(((union e1000_rx_desc_packet_split *)((R).desc))[i]))

trunk/drivers/net/ethernet/intel/e1000e/netdev.c

@@ -933,8 +933,16 @@ static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
 		}
 
 		/* adjust length to remove Ethernet CRC */
-		if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
-			length -= 4;
+		if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
+			/* If configured to store CRC, don't subtract FCS,
+			 * but keep the FCS bytes out of the total_rx_bytes
+			 * counter
+			 */
+			if (netdev->features & NETIF_F_RXFCS)
+				total_rx_bytes -= 4;
+			else
+				length -= 4;
+		}
 
 		total_rx_bytes += length;
 		total_rx_packets++;
@@ -1301,8 +1309,10 @@ static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
 							   DMA_FROM_DEVICE);
 
 				/* remove the CRC */
-				if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
-					l1 -= 4;
+				if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
+					if (!(netdev->features & NETIF_F_RXFCS))
+						l1 -= 4;
+				}
 
 				skb_put(skb, l1);
 				goto copydone;
@@ -1328,8 +1338,10 @@ static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
 		/* strip the ethernet crc, problem is we're using pages now so
 		 * this whole operation can get a little cpu intensive
 		 */
-		if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
-			pskb_trim(skb, skb->len - 4);
+		if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
+			if (!(netdev->features & NETIF_F_RXFCS))
+				pskb_trim(skb, skb->len - 4);
+		}
 
 copydone:
 		total_rx_bytes += skb->len;
@@ -5982,7 +5994,7 @@ static int e1000_set_features(struct net_device *netdev,
 		adapter->flags |= FLAG_TSO_FORCE;
 
 	if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
-			 NETIF_F_RXCSUM | NETIF_F_RXHASH)))
+			 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS)))
 		return 0;
 
 	/*
@@ -5996,6 +6008,20 @@ static int e1000_set_features(struct net_device *netdev,
 		return -EINVAL;
 	}
 
+	if (changed & NETIF_F_RXFCS) {
+		if (features & NETIF_F_RXFCS) {
+			adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
+		} else {
+			/* We need to take it back to defaults, which might mean
+			 * stripping is still disabled at the adapter level.
+			 */
+			if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
+				adapter->flags2 |= FLAG2_CRC_STRIPPING;
+			else
+				adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
+		}
+	}
+
 	netdev->features = features;
 
 	if (netif_running(netdev))
@@ -6194,6 +6220,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 
 	/* Set user-changeable features (subset of all device features) */
 	netdev->hw_features = netdev->features;
+	netdev->hw_features |= NETIF_F_RXFCS;
 
 	if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
 		netdev->features |= NETIF_F_HW_VLAN_FILTER;

trunk/drivers/net/ethernet/intel/e1000e/param.c

@@ -463,10 +463,13 @@ void __devinit e1000e_check_options(struct e1000_adapter *adapter)
 		if (num_CrcStripping > bd) {
 			unsigned int crc_stripping = CrcStripping[bd];
 			e1000_validate_option(&crc_stripping, &opt, adapter);
-			if (crc_stripping == OPTION_ENABLED)
+			if (crc_stripping == OPTION_ENABLED) {
 				adapter->flags2 |= FLAG2_CRC_STRIPPING;
+				adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
+			}
 		} else {
 			adapter->flags2 |= FLAG2_CRC_STRIPPING;
+			adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
 		}
 	}
 	{ /* Kumeran Lock Loss Workaround */