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net-next/hinic: fix a problem in hinic_xmit_frame() 

The calculation of "wqe_size" is not correct when the tx queue is busy in
hinic_xmit_frame().

When there are no free WQEs, the tx flow will unmap the skb buffer, then
ring the doobell for the pending packets. But the "wqe_size" which used
to calculate the doorbell address is not correct. The wqe size should be
cleared to 0, otherwise, it will cause a doorbell error.

This patch fixes the problem.

Reported-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhao Chen 2018-07-18 00:33:18 -04:00 committed by David S. Miller
parent 4905bd9a42
commit f7482683f1
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/huawei/hinic/hinic_tx.c
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@ -229,6 +229,7 @@ netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
txq->txq_stats.tx_busy++;
u64_stats_update_end(&txq->txq_stats.syncp);
err = NETDEV_TX_BUSY;
wqe_size = 0;
goto flush_skbs;
}