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Date: Mon, 27 May 2013 12:38:47 +0530 From: Somnath Kotur <somnath.kotur@...lex.com> To: <netdev@...r.kernel.org> CC: <davem@...emloft.net>, Somnath Kotur <somnath.kotur@...lex.com>, Kalesh AP <kalesh.purayil@...lex.com> Subject: [PATCH net-next 2/3] be2net: Pad skb to meet min Tx pkt size in lancer In Lancer, packets that are 32 bytes or less may cause a transmit stall. The work-around is to pad such packets to a 36 byte length. Signed-off-by: Kalesh AP <kalesh.purayil@...lex.com> Signed-off-by: Somnath Kotur <somnath.kotur@...lex.com> --- drivers/net/ethernet/emulex/benet/be_main.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index 0f21c35..a1b9474 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -856,6 +856,16 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter, unsigned int eth_hdr_len; struct iphdr *ip; + /* Lancer ASIC has a bug wherein packets that are 32 bytes or less + * may cause a transmit stall on that port. So the work-around is to + * pad such packets to a 36-byte length. + */ + if (unlikely(lancer_chip(adapter) && skb->len <= 32)) { + if (skb_padto(skb, 36)) + goto tx_drop; + skb->len = 36; + } + /* For padded packets, BE HW modifies tot_len field in IP header * incorrecly when VLAN tag is inserted by HW. */ -- 1.5.6.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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