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sunvnet: vnet_ack() should check if !start_cons to send a missed trigger
As per comments in vnet_start_xmit, for the edge case when outgoing vnet_start_xmit() data and an incoming STOPPED ACK cross each other in flight, we may need to send the missed START trigger from maybe_tx_wakeup() after checking for a false value of start_cons Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -572,7 +572,7 @@ static int vnet_ack(struct vnet_port *port, void *msgbuf)
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*/
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dr->cons = next_idx(end, dr);
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desc = vio_dring_entry(dr, dr->cons);
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if (desc->hdr.state == VIO_DESC_READY && port->start_cons) {
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if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) {
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/* vnet_start_xmit() just populated this dring but missed
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* sending the "start" LDC message to the consumer.
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* Send a "start" trigger on its behalf.
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