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s390/pci: use pci_rescan_remove_lock 

Make sure that we use the pci_rescan_remove_lock when we remove
or add functions from/to the bus.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2015-07-28 19:14:51 +02:00 committed by Martin Schwidefsky
parent 515f022e8b
commit 2a01bd1bd3
2 changed files with 13 additions and 4 deletions
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6
arch/s390/pci/pci_event.c
View File

@ -87,7 +87,9 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
ret = zpci_enable_device(zdev);
if (ret)
break;
pci_lock_rescan_remove();
pci_rescan_bus(zdev->bus);
pci_unlock_rescan_remove();
break;
case 0x0302: /* Reserved -> Standby */
if (!zdev)
@ -95,7 +97,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
break;
case 0x0303: /* Deconfiguration requested */
if (pdev)
pci_stop_and_remove_bus_device(pdev);
pci_stop_and_remove_bus_device_locked(pdev);
ret = zpci_disable_device(zdev);
if (ret)
@ -112,7 +114,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
/* Give the driver a hint that the function is
* already unusable. */
pdev->error_state = pci_channel_io_perm_failure;
pci_stop_and_remove_bus_device(pdev);
pci_stop_and_remove_bus_device_locked(pdev);
}
zdev->fh = ccdf->fh;

11
arch/s390/pci/pci_sysfs.c
View File

@ -44,17 +44,24 @@ static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
if (!device_remove_file_self(dev, attr))
return count;
pci_lock_rescan_remove();
pci_stop_and_remove_bus_device(pdev);
ret = zpci_disable_device(zdev);
if (ret)
return ret;
goto error;
ret = zpci_enable_device(zdev);
if (ret)
return ret;
goto error;
pci_rescan_bus(zdev->bus);
pci_unlock_rescan_remove();
return count;
error:
pci_unlock_rescan_remove();
return ret;
}
static DEVICE_ATTR_WO(recover);