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be2net: Fix crash on 2nd invocation of PCI AER/EEH error_detected hook

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During a PCI EEH/AER error recovery flow, if the device did not successfully
restart, the error_detected() hook may be called a second time with a
"perm_failure" state. This patch skips over driver cleanup for the second
invocation of the callback.

Also, Lancer error recovery code is fixed-up to handle these changes.

Signed-off-by: Kalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: Somnath kotur <somnath.kotur@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Somnath Kotur 2013-05-29 22:56:17 +00:00 committed by David S. Miller
parent e38b170695
commit 01e5b2c455
2 changed files with 26 additions and 28 deletions
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6
drivers/net/ethernet/emulex/benet/be_cmds.c
View file

@ -562,7 +562,7 @@ int lancer_test_and_set_rdy_state(struct be_adapter *adapter)
resource_error = lancer_provisioning_error(adapter);
if (resource_error)
return -1;
return -EAGAIN;
status = lancer_wait_ready(adapter);
if (!status) {
@ -590,8 +590,8 @@ int lancer_test_and_set_rdy_state(struct be_adapter *adapter)
* when PF provisions resources.
*/
resource_error = lancer_provisioning_error(adapter);
if (status == -1 && !resource_error)
adapter->eeh_error = true;
if (resource_error)
status = -EAGAIN;
return status;
}

48
drivers/net/ethernet/emulex/benet/be_main.c
View file

@ -4098,6 +4098,7 @@ static int be_get_initial_config(struct be_adapter *adapter)
static int lancer_recover_func(struct be_adapter *adapter)
{
struct device *dev = &adapter->pdev->dev;
int status;
status = lancer_test_and_set_rdy_state(adapter);
@ -4109,8 +4110,7 @@ static int lancer_recover_func(struct be_adapter *adapter)
be_clear(adapter);
adapter->hw_error = false;
adapter->fw_timeout = false;
be_clear_all_error(adapter);
status = be_setup(adapter);
if (status)
@ -4122,13 +4122,13 @@ static int lancer_recover_func(struct be_adapter *adapter)
goto err;
}
dev_err(&adapter->pdev->dev,
"Adapter SLIPORT recovery succeeded\n");
dev_err(dev, "Error recovery successful\n");
return 0;
err:
if (adapter->eeh_error)
dev_err(&adapter->pdev->dev,
"Adapter SLIPORT recovery failed\n");
if (status == -EAGAIN)
dev_err(dev, "Waiting for resource provisioning\n");
else
dev_err(dev, "Error recovery failed\n");
return status;
}
@ -4137,28 +4137,27 @@ static void be_func_recovery_task(struct work_struct *work)
{
struct be_adapter *adapter =
container_of(work, struct be_adapter, func_recovery_work.work);
int status;
int status = 0;
be_detect_error(adapter);
if (adapter->hw_error && lancer_chip(adapter)) {
if (adapter->eeh_error)
goto out;
rtnl_lock();
netif_device_detach(adapter->netdev);
rtnl_unlock();
status = lancer_recover_func(adapter);
if (!status)
netif_device_attach(adapter->netdev);
}
out:
schedule_delayed_work(&adapter->func_recovery_work,
msecs_to_jiffies(1000));
/* In Lancer, for all errors other than provisioning error (-EAGAIN),
* no need to attempt further recovery.
*/
if (!status || status == -EAGAIN)
schedule_delayed_work(&adapter->func_recovery_work,
msecs_to_jiffies(1000));
}
static void be_worker(struct work_struct *work)
@ -4441,20 +4440,19 @@ static pci_ers_result_t be_eeh_err_detected(struct pci_dev *pdev,
dev_err(&adapter->pdev->dev, "EEH error detected\n");
adapter->eeh_error = true;
if (!adapter->eeh_error) {
adapter->eeh_error = true;
cancel_delayed_work_sync(&adapter->func_recovery_work);
cancel_delayed_work_sync(&adapter->func_recovery_work);
rtnl_lock();
netif_device_detach(netdev);
rtnl_unlock();
if (netif_running(netdev)) {
rtnl_lock();
be_close(netdev);
netif_device_detach(netdev);
if (netif_running(netdev))
be_close(netdev);
rtnl_unlock();
be_clear(adapter);
}
be_clear(adapter);
if (state == pci_channel_io_perm_failure)
return PCI_ERS_RESULT_DISCONNECT;
@ -4479,7 +4477,6 @@ static pci_ers_result_t be_eeh_reset(struct pci_dev *pdev)
int status;
dev_info(&adapter->pdev->dev, "EEH reset\n");
be_clear_all_error(adapter);
status = pci_enable_device(pdev);
if (status)
@ -4497,6 +4494,7 @@ static pci_ers_result_t be_eeh_reset(struct pci_dev *pdev)
return PCI_ERS_RESULT_DISCONNECT;
pci_cleanup_aer_uncorrect_error_status(pdev);
be_clear_all_error(adapter);
return PCI_ERS_RESULT_RECOVERED;
}