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Commit 48265667 authored by Somnath Kotur's avatar Somnath Kotur Committed by David S. Miller
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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: default avatarKalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: default avatarSomnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eeb65ced

drivers/net/ethernet/emulex/benet/be_main.c

+10 −0
Original line number Diff line number Diff line
@@ -848,6 +848,16 @@ 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.

	 */