netdev - [PATCH] bgmac: omit the fcs

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Message-Id: <1362071814-12822-1-git-send-email-hauke@hauke-m.de>
Date:	Thu, 28 Feb 2013 18:16:54 +0100
From:	Hauke Mehrtens <hauke@...ke-m.de>
To:	davem@...emloft.net
Cc:	zajec5@...il.com, netdev@...r.kernel.org,
	Hauke Mehrtens <hauke@...ke-m.de>
Subject: [PATCH] bgmac: omit the fcs

Do not include the frame check sequence when adding the skb to
netif_receive_skb(). This causes problems when this interface was
bridged to a wifi ap and a big package should be forwarded from this
Ethernet driver through a bride to the wifi client.

Signed-off-by: Hauke Mehrtens <hauke@...ke-m.de>
---
 drivers/net/ethernet/broadcom/bgmac.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index bf985c0..bce30e7 100644
--- 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 bgmac *bgmac, struct bgmac_dma_ring *ring,
 			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);
-- 
1.7.10.4

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