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ibmvnic: Halt TX and report carrier off on H_CLOSED return code 

This patch disables transmissions and reports carrier off if xmit
function returns that the hardware TX queue is closed. The driver can
then await a signal from firmware to determine the correct reset method.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon 2017-05-26 10:30:42 -04:00 committed by David S. Miller
parent 8cb31cfc94
commit b8c80b8413
1 changed files with 8 additions and 2 deletions
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10
drivers/net/ethernet/ibm/ibmvnic.c
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@ -1111,8 +1111,14 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
dev_kfree_skb_any(skb);
tx_buff->skb = NULL;
if (lpar_rc == H_CLOSED)
netif_stop_subqueue(netdev, queue_num);
if (lpar_rc == H_CLOSED) {
/* Disable TX and report carrier off if queue is closed.
* Firmware guarantees that a signal will be sent to the
* driver, triggering a reset or some other action.
*/
netif_tx_stop_all_queues(netdev);
netif_carrier_off(netdev);
}
tx_send_failed++;
tx_dropped++;