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| author | Somnath Kotur <somnath.kotur@emulex.com> | 2013-05-26 21:08:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-27 22:27:02 -0700 |
| commit | 48265667a756ab1c2750048caee3da719a86ebb2 (patch) | |
| tree | 09e9990161b50656a3ac47a2425237c24db50c70 | |
| parent | eeb65cedd78ebd375608d71d703e6b0b9296efbd (diff) | |
| download | op-kernel-dev-48265667a756ab1c2750048caee3da719a86ebb2.zip op-kernel-dev-48265667a756ab1c2750048caee3da719a86ebb2.tar.gz | |
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@emulex.com>
Signed-off-by: Somnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | 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 d158082..26e222f 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -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. */ |
