brcm47xx: bgmac: omit the fcs

This fixes #13058 and hopefully #12927


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35834 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm47xx/patches-3.6/765-bgmac-omit-the-fcs.patch

@@ -0,0 +1,19 @@
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -301,12 +301,16 @@ static int bgmac_dma_rx_read(struct bgma
+ 			bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
+ 				  ring->start);
+ 		} else {
++			/* Omit CRC. */
++			len -= ETH_FCS_LEN;
++
+ 			new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len);
+ 			if (new_skb) {
+ 				skb_put(new_skb, len);
+ 				skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET,
+ 								 new_skb->data,
+ 								 len);
++				skb_checksum_none_assert(skb);
+ 				new_skb->protocol =
+ 					eth_type_trans(new_skb, bgmac->net_dev);
+ 				netif_receive_skb(new_skb);

target/linux/brcm47xx/patches-3.8/765-bgmac-omit-the-fcs.patch

@@ -0,0 +1,19 @@
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -301,12 +301,16 @@ static int bgmac_dma_rx_read(struct bgma
+ 			bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
+ 				  ring->start);
+ 		} else {
++			/* Omit CRC. */
++			len -= ETH_FCS_LEN;
++
+ 			new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len);
+ 			if (new_skb) {
+ 				skb_put(new_skb, len);
+ 				skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET,
+ 								 new_skb->data,
+ 								 len);
++				skb_checksum_none_assert(skb);
+ 				new_skb->protocol =
+ 					eth_type_trans(new_skb, bgmac->net_dev);
+ 				netif_receive_skb(new_skb);