Commit 8d9853d9 authored by Ben Hutchings's avatar Ben Hutchings Committed by Jeff Garzik

sfc: Use a separate workqueue for resets

This avoids deadlock in case a reset is triggered during self-test.
Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 9dadae68
......@@ -1762,7 +1762,7 @@ void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
efx->reset_pending = method;
queue_work(efx->workqueue, &efx->reset_work);
queue_work(efx->reset_workqueue, &efx->reset_work);
}
/**************************************************************************
......@@ -1907,14 +1907,28 @@ static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type,
goto fail1;
}
efx->reset_workqueue = create_singlethread_workqueue("sfc_reset");
if (!efx->reset_workqueue) {
rc = -ENOMEM;
goto fail2;
}
return 0;
fail2:
destroy_workqueue(efx->workqueue);
efx->workqueue = NULL;
fail1:
return rc;
}
static void efx_fini_struct(struct efx_nic *efx)
{
if (efx->reset_workqueue) {
destroy_workqueue(efx->reset_workqueue);
efx->reset_workqueue = NULL;
}
if (efx->workqueue) {
destroy_workqueue(efx->workqueue);
efx->workqueue = NULL;
......@@ -1977,7 +1991,7 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
* scheduled from this point because efx_stop_all() has been
* called, we are no longer registered with driverlink, and
* the net_device's have been removed. */
flush_workqueue(efx->workqueue);
flush_workqueue(efx->reset_workqueue);
efx_pci_remove_main(efx);
......@@ -2098,7 +2112,7 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
* scheduled since efx_stop_all() has been called, and we
* have not and never have been registered with either
* the rtnetlink or driverlink layers. */
cancel_work_sync(&efx->reset_work);
flush_workqueue(efx->reset_workqueue);
/* Retry if a recoverably reset event has been scheduled */
if ((efx->reset_pending != RESET_TYPE_INVISIBLE) &&
......
......@@ -616,7 +616,9 @@ union efx_multicast_hash {
* @pci_dev: The PCI device
* @type: Controller type attributes
* @legacy_irq: IRQ number
* @workqueue: Workqueue for resets, port reconfigures and the HW monitor
* @workqueue: Workqueue for port reconfigures and the HW monitor.
* Work items do not hold and must not acquire RTNL.
* @reset_workqueue: Workqueue for resets. Work item will acquire RTNL.
* @reset_work: Scheduled reset workitem
* @monitor_work: Hardware monitor workitem
* @membase_phys: Memory BAR value as physical address
......@@ -684,6 +686,7 @@ struct efx_nic {
const struct efx_nic_type *type;
int legacy_irq;
struct workqueue_struct *workqueue;
struct workqueue_struct *reset_workqueue;
struct work_struct reset_work;
struct delayed_work monitor_work;
resource_size_t membase_phys;
......
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