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s390/pci: fix removal of nonexistent pci bus

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If we remove a pci bus after receiving a hotplug notification we need
to check if the bus is actually present (creation of the pci bus
during an earlier notification may have been failed).

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 2013-12-12 17:50:53 +01:00 committed by Martin Schwidefsky
parent aa3b7c2967
commit 704268925d
1 changed files with 2 additions and 0 deletions
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2
arch/s390/pci/pci_event.c
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@ -112,6 +112,8 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
clp_rescan_pci_devices();
break;
case 0x0308: /* Standby -> Reserved */
if (!zdev)
break;
pci_stop_root_bus(zdev->bus);
pci_remove_root_bus(zdev->bus);
break;