1 files changed, 17 insertions, 26 deletions

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 7e855f9bbd97..d29bb532eccf 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;
                 }