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be2net: pad skb to meet minimum TX pkt size in BE3

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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: Suresh Reddy <suresh.reddy@avagotech.com>
Signed-off-by: Sathya Perla <sathya.perla@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Suresh Reddy 2015-10-12 03:47:19 -04:00 committed by David S. Miller
parent 0c8845679f
commit 8227e9901d
1 changed files with 5 additions and 4 deletions
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9
drivers/net/ethernet/emulex/benet/be_main.c
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@ -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;
}