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cxgb4: LE-Workaround is not atomic in firmware

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The LE workaround in firmware is not atomic and fw_ofld_connection_wrs must not interleave.
Therefore, when the workaround is enabled, we need to send all ctrlq WRs on a single ctrl queue.

Based on original work by Santosh Rastapur <santosh@chelsio.com>

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kumar Sanghvi 2014-02-18 17:56:11 +05:30 committed by David S. Miller
parent 57d8b7649d
commit 4fe44dd776
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/chelsio/cxgb4/sge.c
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@ -1467,8 +1467,12 @@ static inline int ofld_send(struct adapter *adap, struct sk_buff *skb)
{ {
unsigned int idx = skb_txq(skb); unsigned int idx = skb_txq(skb);
if (unlikely(is_ctrl_pkt(skb))) if (unlikely(is_ctrl_pkt(skb))) {
/* Single ctrl queue is a requirement for LE workaround path */
if (adap->tids.nsftids)
idx = 0;
return ctrl_xmit(&adap->sge.ctrlq[idx], skb); return ctrl_xmit(&adap->sge.ctrlq[idx], skb);
}
return ofld_xmit(&adap->sge.ofldtxq[idx], skb); return ofld_xmit(&adap->sge.ofldtxq[idx], skb);
} }