diff options
author | Ben Hutchings <bhutchings@solarflare.com> | 2008-07-18 20:01:20 +0200 |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2008-07-23 01:44:13 +0200 |
commit | 8d9853d911b9d3fb767c3886066530c0e39b78ba (patch) | |
tree | ff27498e3d6b747bf07e21baa1b27d07be8f58ee | |
parent | sfc: I2C adapter initialisation fixes (diff) | |
download | linux-8d9853d911b9d3fb767c3886066530c0e39b78ba.tar.xz linux-8d9853d911b9d3fb767c3886066530c0e39b78ba.zip |
sfc: Use a separate workqueue for resets
This avoids deadlock in case a reset is triggered during self-test.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
-rw-r--r-- | drivers/net/sfc/efx.c | 20 | ||||
-rw-r--r-- | drivers/net/sfc/net_driver.h | 5 |
2 files changed, 21 insertions, 4 deletions
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c index 7b2015f9e469..7b2a81866232 100644 --- a/drivers/net/sfc/efx.c +++ b/drivers/net/sfc/efx.c @@ -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) && diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h index d803b86c647c..219c74a772c3 100644 --- a/drivers/net/sfc/net_driver.h +++ b/drivers/net/sfc/net_driver.h @@ -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; |