2 files changed, 46 insertions, 76 deletions

diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 27c77306193b..99baf0e099fc 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -225,9 +225,6 @@ struct e1000_rx_ring {
         struct e1000_ps_page *ps_page;
         struct e1000_ps_page_dma *ps_page_dma;
 
-        struct sk_buff *rx_skb_top;
-        struct sk_buff *rx_skb_prev;
-
         /* cpu for rx queue */
         int cpu;
 
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 31e332935e5a..5b7d0f425af2 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -103,7 +103,7 @@ static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
 #else
 #define DRIVERNAPI "-NAPI"
 #endif
-#define DRV_VERSION "6.3.9-k2"DRIVERNAPI
+#define DRV_VERSION "6.3.9-k4"DRIVERNAPI
 char e1000_driver_version[] = DRV_VERSION;
 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
 
@@ -1635,8 +1635,6 @@ setup_rx_desc_die:
 
         rxdr->next_to_clean = 0;
         rxdr->next_to_use = 0;
-        rxdr->rx_skb_top = NULL;
-        rxdr->rx_skb_prev = NULL;
 
         return 0;
 }
@@ -1713,8 +1711,23 @@ e1000_setup_rctl(struct e1000_adapter *adapter)
                 rctl |= adapter->rx_buffer_len << 0x11;
         } else {
                 rctl &= ~E1000_RCTL_SZ_4096;
-                rctl &= ~E1000_RCTL_BSEX;
-                rctl |= E1000_RCTL_SZ_2048;
+                rctl |= E1000_RCTL_BSEX; 
+                switch (adapter->rx_buffer_len) {
+                case E1000_RXBUFFER_2048:
+                default:
+                        rctl |= E1000_RCTL_SZ_2048;
+                        rctl &= ~E1000_RCTL_BSEX;
+                        break;
+                case E1000_RXBUFFER_4096:
+                        rctl |= E1000_RCTL_SZ_4096;
+                        break;
+                case E1000_RXBUFFER_8192:
+                        rctl |= E1000_RCTL_SZ_8192;
+                        break;
+                case E1000_RXBUFFER_16384:
+                        rctl |= E1000_RCTL_SZ_16384;
+                        break;
+                }
         }
 
 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
@@ -2107,16 +2120,6 @@ e1000_clean_rx_ring(struct e1000_adapter *adapter,
                 }
         }
 
-        /* there also may be some cached data in our adapter */
-        if (rx_ring->rx_skb_top) {
-                dev_kfree_skb(rx_ring->rx_skb_top);
-
-                /* rx_skb_prev will be wiped out by rx_skb_top */
-                rx_ring->rx_skb_top = NULL;
-                rx_ring->rx_skb_prev = NULL;
-        }
-
-
         size = sizeof(struct e1000_buffer) * rx_ring->count;
         memset(rx_ring->buffer_info, 0, size);
         size = sizeof(struct e1000_ps_page) * rx_ring->count;
@@ -3106,24 +3109,27 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
                 break;
         }
 
-        /* since the driver code now supports splitting a packet across
-         * multiple descriptors, most of the fifo related limitations on
-         * jumbo frame traffic have gone away.
-         * simply use 2k descriptors for everything.
-         *
-         * NOTE: dev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
-         * means we reserve 2 more, this pushes us to allocate from the next
-         * larger slab size
-         * i.e. RXBUFFER_2048 --> size-4096 slab */
-
-        /* recent hardware supports 1KB granularity */
+
         if (adapter->hw.mac_type > e1000_82547_rev_2) {
-                adapter->rx_buffer_len =
-                    ((max_frame < E1000_RXBUFFER_2048) ?
-                        max_frame : E1000_RXBUFFER_2048);
+                adapter->rx_buffer_len = max_frame;
                 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
-        } else
-                adapter->rx_buffer_len = E1000_RXBUFFER_2048;
+        } else {
+                if(unlikely((adapter->hw.mac_type < e1000_82543) &&
+                   (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
+                        DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
+                                            "on 82542\n");
+                        return -EINVAL;
+                } else {
+                        if(max_frame <= E1000_RXBUFFER_2048)
+                                adapter->rx_buffer_len = E1000_RXBUFFER_2048;
+                        else if(max_frame <= E1000_RXBUFFER_4096)
+                                adapter->rx_buffer_len = E1000_RXBUFFER_4096;
+                        else if(max_frame <= E1000_RXBUFFER_8192)
+                                adapter->rx_buffer_len = E1000_RXBUFFER_8192;
+                        else if(max_frame <= E1000_RXBUFFER_16384)
+                                adapter->rx_buffer_len = E1000_RXBUFFER_16384;
+                }
+        }
 
         netdev->mtu = new_mtu;
 
@@ -3620,7 +3626,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
         uint8_t last_byte;
         unsigned int i;
         int cleaned_count = 0;
-        boolean_t cleaned = FALSE, multi_descriptor = FALSE;
+        boolean_t cleaned = FALSE;
 
         i = rx_ring->next_to_clean;
         rx_desc = E1000_RX_DESC(*rx_ring, i);
@@ -3652,43 +3658,12 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
 
                 length = le16_to_cpu(rx_desc->length);
 
-                skb_put(skb, length);
-
-                if (!(status & E1000_RXD_STAT_EOP)) {
-                        if (!rx_ring->rx_skb_top) {
-                                rx_ring->rx_skb_top = skb;
-                                rx_ring->rx_skb_top->len = length;
-                                rx_ring->rx_skb_prev = skb;
-                        } else {
-                                if (skb_shinfo(rx_ring->rx_skb_top)->frag_list) {
-                                        rx_ring->rx_skb_prev->next = skb;
-                                        skb->prev = rx_ring->rx_skb_prev;
-                                } else {
-                                        skb_shinfo(rx_ring->rx_skb_top)->frag_list = skb;
-                                }
-                                rx_ring->rx_skb_prev = skb;
-                                rx_ring->rx_skb_top->data_len += length;
-                        }
+                if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
+                        /* All receives must fit into a single buffer */
+                        E1000_DBG("%s: Receive packet consumed multiple"
+                                  " buffers\n", netdev->name);
+                        dev_kfree_skb_irq(skb);
                         goto next_desc;
-                } else {
-                        if (rx_ring->rx_skb_top) {
-                                if (skb_shinfo(rx_ring->rx_skb_top)
-                                                        ->frag_list) {
-                                        rx_ring->rx_skb_prev->next = skb;
-                                        skb->prev = rx_ring->rx_skb_prev;
-                                } else
-                                        skb_shinfo(rx_ring->rx_skb_top)
-                                                        ->frag_list = skb;
-
-                                rx_ring->rx_skb_top->data_len += length;
-                                rx_ring->rx_skb_top->len +=
-                                        rx_ring->rx_skb_top->data_len;
-
-                                skb = rx_ring->rx_skb_top;
-                                multi_descriptor = TRUE;
-                                rx_ring->rx_skb_top = NULL;
-                                rx_ring->rx_skb_prev = NULL;
-                        }
                 }
 
                 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
@@ -3712,10 +3687,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
                  * performance for small packets with large amounts
                  * of reassembly being done in the stack */
 #define E1000_CB_LENGTH 256
-                if ((length < E1000_CB_LENGTH) &&
-                   !rx_ring->rx_skb_top &&
-                   /* or maybe (status & E1000_RXD_STAT_EOP) && */
-                   !multi_descriptor) {
+                if (length < E1000_CB_LENGTH) {
                         struct sk_buff *new_skb =
                             dev_alloc_skb(length + NET_IP_ALIGN);
                         if (new_skb) {
@@ -3729,7 +3701,8 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
                                 skb = new_skb;
                                 skb_put(skb, length);
                         }
-                }
+                } else
+                        skb_put(skb, length);
 
                 /* end copybreak code */