Yunsheng Lin 2a597eff24
net: hns3: fix for TX queue not restarted problem ...
There is timing window between ring_space checking and
netif_stop_subqueue when transmiting a SKB, and the TX BD
cleaning may be executed during the time window, which may
caused TX queue not restarted problem.
This patch fixes it by rechecking the ring_space after
netif_stop_subqueue to make sure TX queue is restarted.
Also, the ring->next_to_clean is updated even when pkts is
zero, because all the TX BD cleaned may be non-SKB, so it
needs to check if TX queue need to be restarted.
Fixes: 76ad4f0ee7linyunsheng@huawei.com >
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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2a597eff24