diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/eeh_pe.c | 17 |
2 files changed, 18 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index acdfcaaf5c36..f3b49d6d5259 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -59,6 +59,7 @@ struct eeh_pe { int config_addr; /* Traditional PCI address */ int addr; /* PE configuration address */ struct pci_controller *phb; /* Associated PHB */ + struct pci_bus *bus; /* Top PCI bus for bus PE */ int check_count; /* Times of ignored error */ int freeze_count; /* Times of froze up */ int false_positives; /* Times of reported #ff's */ diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c index 3d2dcf5afc29..c96366758acf 100644 --- a/arch/powerpc/kernel/eeh_pe.c +++ b/arch/powerpc/kernel/eeh_pe.c @@ -365,6 +365,17 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev) pe->config_addr = edev->config_addr; /* + * While doing PE reset, we probably hot-reset the + * upstream bridge. However, the PCI devices including + * the associated EEH devices might be removed when EEH + * core is doing recovery. So that won't safe to retrieve + * the bridge through downstream EEH device. We have to + * trace the parent PCI bus, then the upstream bridge. + */ + if (eeh_probe_mode_dev()) + pe->bus = eeh_dev_to_pci_dev(edev)->bus; + + /* * Put the new EEH PE into hierarchy tree. If the parent * can't be found, the newly created PE will be attached * to PHB directly. Otherwise, we have to associate the @@ -641,12 +652,18 @@ struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe) bus = pe->phb->bus; } else if (pe->type & EEH_PE_BUS || pe->type & EEH_PE_DEVICE) { + if (pe->bus) { + bus = pe->bus; + goto out; + } + edev = list_first_entry(&pe->edevs, struct eeh_dev, list); pdev = eeh_dev_to_pci_dev(edev); if (pdev) bus = pdev->bus; } +out: eeh_unlock(); return bus; |