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ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context 

Schedule these XPORT event tasks in the shared workqueue
so that IRQs are not freed in an interrupt context when
sub-CRQs are released.

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 2016-10-27 12:28:51 -05:00 committed by David S. Miller
parent dbc34e73c2
commit 9888d7b02c
2 changed files with 25 additions and 11 deletions
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35
drivers/net/ethernet/ibm/ibmvnic.c
View File

@ -3232,6 +3232,27 @@ static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
spin_unlock_irqrestore(&adapter->inflight_lock, flags);
}
static void ibmvnic_xport_event(struct work_struct *work)
{
struct ibmvnic_adapter *adapter = container_of(work,
struct ibmvnic_adapter,
ibmvnic_xport);
struct device *dev = &adapter->vdev->dev;
long rc;
ibmvnic_free_inflight(adapter);
release_sub_crqs(adapter);
if (adapter->migrated) {
rc = ibmvnic_reenable_crq_queue(adapter);
if (rc)
dev_err(dev, "Error after enable rc=%ld\n", rc);
adapter->migrated = false;
rc = ibmvnic_send_crq_init(adapter);
if (rc)
dev_err(dev, "Error sending init rc=%ld\n", rc);
}
}
static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
struct ibmvnic_adapter *adapter)
{
@ -3267,15 +3288,7 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
dev_info(dev, "Re-enabling adapter\n");
adapter->migrated = true;
ibmvnic_free_inflight(adapter);
release_sub_crqs(adapter);
rc = ibmvnic_reenable_crq_queue(adapter);
if (rc)
dev_err(dev, "Error after enable rc=%ld\n", rc);
adapter->migrated = false;
rc = ibmvnic_send_crq_init(adapter);
if (rc)
dev_err(dev, "Error sending init rc=%ld\n", rc);
schedule_work(&adapter->ibmvnic_xport);
} else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
dev_info(dev, "Backing device failover detected\n");
netif_carrier_off(netdev);
@ -3284,8 +3297,7 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
/* The adapter lost the connection */
dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
gen_crq->cmd);
ibmvnic_free_inflight(adapter);
release_sub_crqs(adapter);
schedule_work(&adapter->ibmvnic_xport);
}
return;
case IBMVNIC_CRQ_CMD_RSP:
@ -3726,6 +3738,7 @@ static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
SET_NETDEV_DEV(netdev, &dev->dev);
INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
spin_lock_init(&adapter->stats_lock);

1
drivers/net/ethernet/ibm/ibmvnic.h
View File

@ -1048,5 +1048,6 @@ struct ibmvnic_adapter {
u8 map_id;
struct work_struct vnic_crq_init;
struct work_struct ibmvnic_xport;
bool failover;
};