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Commit 8227e990 authored by Suresh Reddy's avatar Suresh Reddy Committed by David S. Miller
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be2net: pad skb to meet minimum TX pkt size in BE3 



On BE3 chips in SRIOV configs, the TX path stalls when a packet less
than 32B is received from the host. A workaround to pad such packets
already exists for the Skyhawk and Lancer chips. Use the same workaround
for BE3 chips too.

Signed-off-by: default avatarSuresh Reddy <suresh.reddy@avagotech.com>
Signed-off-by: default avatarSathya Perla <sathya.perla@avagotech.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0c884567

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

+5 −4
Original line number Diff line number Diff line
@@ -1123,11 +1123,12 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter, 
					   struct sk_buff *skb,

					   struct be_wrb_params *wrb_params)

{

	/* Lancer, SH-R ASICs have 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 short packets (<= 32 bytes) to a 36-byte length.

	/* Lancer, SH and BE3 in SRIOV mode have a bug wherein

	 * packets that are 32b or less may cause a transmit stall

	 * on that port. The workaround is to pad such packets

	 * (len <= 32 bytes) to a minimum length of 36b.

	 */

	if (unlikely(!BEx_chip(adapter) && skb->len <= 32)) {

	if (skb->len <= 32) {

		if (skb_put_padto(skb, 36))

			return NULL;

	}