1 files changed, 35 insertions, 27 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 7e855f9bbd97..765543663a4f 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1698,18 +1698,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
 	rctl &= ~E1000_RCTL_SZ_4096;
 	rctl |= E1000_RCTL_BSEX;
 	switch (adapter->rx_buffer_len) {
-		case E1000_RXBUFFER_256:
-			rctl |= E1000_RCTL_SZ_256;
-			rctl &= ~E1000_RCTL_BSEX;
-			break;
-		case E1000_RXBUFFER_512:
-			rctl |= E1000_RCTL_SZ_512;
-			rctl &= ~E1000_RCTL_BSEX;
-			break;
-		case E1000_RXBUFFER_1024:
-			rctl |= E1000_RCTL_SZ_1024;
-			rctl &= ~E1000_RCTL_BSEX;
-			break;
 		case E1000_RXBUFFER_2048:
 		default:
 			rctl |= E1000_RCTL_SZ_2048;
@@ -2802,13 +2790,13 @@ 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_unmap_and_free_tx_resource(adapter, buffer_info);
 	}
@@ -3176,13 +3164,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
 	 *  however with the new *_jumbo_rx* routines, jumbo receives will use
 	 *  fragmented skbs */
 
-	if (max_frame <= E1000_RXBUFFER_256)
-		adapter->rx_buffer_len = E1000_RXBUFFER_256;
-	else if (max_frame <= E1000_RXBUFFER_512)
-		adapter->rx_buffer_len = E1000_RXBUFFER_512;
-	else if (max_frame <= E1000_RXBUFFER_1024)
-		adapter->rx_buffer_len = E1000_RXBUFFER_1024;
-	else if (max_frame <= E1000_RXBUFFER_2048)
+	if (max_frame <= E1000_RXBUFFER_2048)
 		adapter->rx_buffer_len = E1000_RXBUFFER_2048;
 	else
 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
@@ -3850,13 +3832,22 @@ 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 (unlikely(!(status & E1000_RXD_STAT_EOP) || (length <= 4))) {
+		 * packet, if thats the case we need to toss it.  In fact, we
+		 * 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->discarding = true;
+
+		if (adapter->discarding) {
 			/* All receives must fit into a single buffer */
 			E1000_DBG("%s: Receive packet consumed multiple"
 				  " buffers\n", netdev->name);
 			/* recycle */
 			buffer_info->skb = skb;
+			if (status & E1000_RXD_STAT_EOP)
+				adapter->discarding = false;
 			goto next_desc;
 		}
 
@@ -4015,11 +4006,21 @@ check_page:
 			}
 		}
 
-		if (!buffer_info->dma)
+		if (!buffer_info->dma) {
 			buffer_info->dma = pci_map_page(pdev,
 			                                buffer_info->page, 0,
 			                                buffer_info->length,
 			                                PCI_DMA_FROMDEVICE);
+			if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
+				put_page(buffer_info->page);
+				dev_kfree_skb(skb);
+				buffer_info->page = NULL;
+				buffer_info->skb = NULL;
+				buffer_info->dma = 0;
+				adapter->alloc_rx_buff_failed++;
+				break; /* while !buffer_info->skb */
+			}
+		}
 
 		rx_desc = E1000_RX_DESC(*rx_ring, i);
 		rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
@@ -4110,6 +4111,13 @@ map_skb:
 						  skb->data,
 						  buffer_info->length,
 						  PCI_DMA_FROMDEVICE);
+		if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
+			dev_kfree_skb(skb);
+			buffer_info->skb = NULL;
+			buffer_info->dma = 0;
+			adapter->alloc_rx_buff_failed++;
+			break; /* while !buffer_info->skb */
+		}
 
 		/*
 		 * XXX if it was allocated cleanly it will never map to a