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ibmvnic: Wait for any pending scrqs entries at driver close 

When closing the ibmvnic driver we need to wait for any pending
sub crq entries to ensure they are handled.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Fontenot 2017-05-03 14:05:02 -04:00 committed by David S. Miller
parent b41b83e9a7
commit 46293b940f
1 changed files with 27 additions and 20 deletions
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47
drivers/net/ethernet/ibm/ibmvnic.c
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@ -743,23 +743,6 @@ static int ibmvnic_open(struct net_device *netdev)
return rc;
}
static void disable_sub_crqs(struct ibmvnic_adapter *adapter)
{
int i;
if (adapter->tx_scrq) {
for (i = 0; i < adapter->req_tx_queues; i++)
if (adapter->tx_scrq[i])
disable_irq(adapter->tx_scrq[i]->irq);
}
if (adapter->rx_scrq) {
for (i = 0; i < adapter->req_rx_queues; i++)
if (adapter->rx_scrq[i])
disable_irq(adapter->rx_scrq[i]->irq);
}
}
static void clean_tx_pools(struct ibmvnic_adapter *adapter)
{
struct ibmvnic_tx_pool *tx_pool;
@ -797,15 +780,39 @@ static int __ibmvnic_close(struct net_device *netdev)
adapter->state = VNIC_CLOSING;
netif_tx_stop_all_queues(netdev);
clean_tx_pools(adapter);
disable_sub_crqs(adapter);
if (adapter->napi) {
for (i = 0; i < adapter->req_rx_queues; i++)
napi_disable(&adapter->napi[i]);
}
clean_tx_pools(adapter);
if (adapter->tx_scrq) {
for (i = 0; i < adapter->req_tx_queues; i++)
if (adapter->tx_scrq[i]->irq)
disable_irq(adapter->tx_scrq[i]->irq);
}
rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
if (rc)
return rc;
if (adapter->rx_scrq) {
for (i = 0; i < adapter->req_rx_queues; i++) {
int retries = 10;
while (pending_scrq(adapter, adapter->rx_scrq[i])) {
retries--;
mdelay(100);
if (retries == 0)
break;
}
if (adapter->rx_scrq[i]->irq)
disable_irq(adapter->rx_scrq[i]->irq);
}
}
adapter->state = VNIC_CLOSED;
return rc;