AcoSail/kernel_optimize_test
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vxge: don't drop frame on tx queue full

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The vxge driver will drop a packet in its transmit function if the number
of TxDs available hits 0.  Instead of doing that, simply stop the transmit
queue when transmitting a packet with the last available TxD.

Signed-off-by: Benjamin LaHaise <ben.lahaise@neterion.com>
Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin LaHaise 2009-08-04 10:20:44 +00:00 committed by David S. Miller
parent 36e89d73e5
commit 4403b37188
1 changed files with 6 additions and 0 deletions
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6
drivers/net/vxge/vxge-main.c
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@ -895,6 +895,12 @@ vxge_xmit(struct sk_buff *skb, struct net_device *dev)
goto _exit2;
}
/* Last TXD? Stop tx queue to avoid dropping packets. TX
* completion will resume the queue.
*/
if (avail == 1)
vxge_stop_tx_queue(fifo);
status = vxge_hw_fifo_txdl_reserve(fifo_hw, &dtr, &dtr_priv);
if (unlikely(status != VXGE_HW_OK)) {
vxge_debug_tx(VXGE_ERR,