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be2net: Fix to prevent Tx stall on SH-R when packet size < 32

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Tx on SH-R can lockup if the packet size is less than 32 bytes.
Pad such packets to a safer 36-byte size.
Patch uses the Lancer-R workaround - which checks for packet <= 32-bytes

Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ajit Khaparde 2013-09-27 15:17:04 -05:00 committed by David S. Miller
parent a97b7c3aad
commit b54881f994
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/emulex/benet/be_main.c
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@ -855,11 +855,11 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
unsigned int eth_hdr_len; unsigned int eth_hdr_len;
struct iphdr *ip; struct iphdr *ip;
/* Lancer ASIC has a bug wherein packets that are 32 bytes or less /* 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 * may cause a transmit stall on that port. So the work-around is to
* pad such packets to a 36-byte length. * pad short packets (<= 32 bytes) to a 36-byte length.
*/ */
if (unlikely(lancer_chip(adapter) && skb->len <= 32)) { if (unlikely(!BEx_chip(adapter) && skb->len <= 32)) {
if (skb_padto(skb, 36)) if (skb_padto(skb, 36))
goto tx_drop; goto tx_drop;
skb->len = 36; skb->len = 36;