1 files changed, 28 insertions, 29 deletions

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index c45965a256b6..57f149b75fbe 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -450,13 +450,23 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 
 		length = le16_to_cpu(rx_desc->length);
 
-		/* !EOP means multiple descriptors were used to store a single
-		 * packet, also make sure the frame isn't just CRC only */
-		if (!(status & E1000_RXD_STAT_EOP) || (length <= 4)) {
+		/*
+		 * !EOP means multiple descriptors were used to store a single
+		 * packet, if that's the case we need to toss it.  In fact, we
+		 * need to toss every packet with the EOP bit clear and the
+		 * next frame that _does_ have the EOP bit set, as it is by
+		 * definition only a frame fragment
+		 */
+		if (unlikely(!(status & E1000_RXD_STAT_EOP)))
+			adapter->flags2 |= FLAG2_IS_DISCARDING;
+
+		if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 			/* All receives must fit into a single buffer */
 			e_dbg("Receive packet consumed multiple buffers\n");
 			/* recycle */
 			buffer_info->skb = skb;
+			if (status & E1000_RXD_STAT_EOP)
+				adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 			goto next_desc;
 		}
 
@@ -745,10 +755,16 @@ static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 				 PCI_DMA_FROMDEVICE);
 		buffer_info->dma = 0;
 
-		if (!(staterr & E1000_RXD_STAT_EOP)) {
+		/* see !EOP comment in other rx routine */
+		if (!(staterr & E1000_RXD_STAT_EOP))
+			adapter->flags2 |= FLAG2_IS_DISCARDING;
+
+		if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 			e_dbg("Packet Split buffers didn't pick up the full "
 			      "packet\n");
 			dev_kfree_skb_irq(skb);
+			if (staterr & E1000_RXD_STAT_EOP)
+				adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 			goto next_desc;
 		}
 
@@ -1118,6 +1134,7 @@ static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
 
 	rx_ring->next_to_clean = 0;
 	rx_ring->next_to_use = 0;
+	adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 
 	writel(0, adapter->hw.hw_addr + rx_ring->head);
 	writel(0, adapter->hw.hw_addr + rx_ring->tail);
@@ -2333,18 +2350,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
 	rctl &= ~E1000_RCTL_SZ_4096;
 	rctl |= E1000_RCTL_BSEX;
 	switch (adapter->rx_buffer_len) {
-	case 256:
-		rctl |= E1000_RCTL_SZ_256;
-		rctl &= ~E1000_RCTL_BSEX;
-		break;
-	case 512:
-		rctl |= E1000_RCTL_SZ_512;
-		rctl &= ~E1000_RCTL_BSEX;
-		break;
-	case 1024:
-		rctl |= E1000_RCTL_SZ_1024;
-		rctl &= ~E1000_RCTL_BSEX;
-		break;
 	case 2048:
 	default:
 		rctl |= E1000_RCTL_SZ_2048;
@@ -3781,7 +3786,7 @@ static int e1000_tso(struct e1000_adapter *adapter,
 		                                         0, IPPROTO_TCP, 0);
 		cmd_length = E1000_TXD_CMD_IP;
 		ipcse = skb_transport_offset(skb) - 1;
-	} else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
+	} else if (skb_is_gso_v6(skb)) {
 		ipv6_hdr(skb)->payload_len = 0;
 		tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 		                                       &ipv6_hdr(skb)->daddr,
@@ -3962,13 +3967,13 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
 dma_error:
 	dev_err(&pdev->dev, "TX DMA map failed\n");
 	buffer_info->dma = 0;
-	count--;
-
-	while (count >= 0) {
+	if (count)
 		count--;
-		i--;
-		if (i < 0)
+
+	while (count--) {
+		if (i==0)
 			i += tx_ring->count;
+		i--;
 		buffer_info = &tx_ring->buffer_info[i];
 		e1000_put_txbuf(adapter, buffer_info);;
 	}
@@ -4317,13 +4322,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
 	 * fragmented skbs
 	 */
 
-	if (max_frame <= 256)
-		adapter->rx_buffer_len = 256;
-	else if (max_frame <= 512)
-		adapter->rx_buffer_len = 512;
-	else if (max_frame <= 1024)
-		adapter->rx_buffer_len = 1024;
-	else if (max_frame <= 2048)
+	if (max_frame <= 2048)
 		adapter->rx_buffer_len = 2048;
 	else
 		adapter->rx_buffer_len = 4096;