forked from Minki/linux
e2413a7dae
The underlying slot hotplug registration code assumed multiple slots, but the actual implementation is broken for multiple slots. This went unnoticed for years do to the fact that PowerVM seems to only ever provide a single hotplug slot per PHB. Under qemu/kvm the hotplug slot model aligns more with x86 where multiple slots are presented under a single PHB. As seen in the following each additional slot after the first fails to register due to each slot always being compared against the first child node of the PHB in the device tree. rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1 rpaphp: Slot [Slot 0] registered rpaphp: pci_hp_register failed with error -16 rpaphp: pci_hp_register failed with error -16 rpaphp: pci_hp_register failed with error -16 rpaphp: pci_hp_register failed with error -16 The registration logic is fixed so that each slot is compared against the existing child devices of the PHB in the device tree to determine present slots vs empty slots. rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1 rpaphp: Slot [C0] registered rpaphp: Slot [C1] registered rpaphp: Slot [C2] registered rpaphp: Slot [C3] registered rpaphp: Slot [C4] registered Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> [mpe: Massage changelog] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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| .. | ||
| acpi_pcihp.c | ||
| acpiphp_core.c | ||
| acpiphp_glue.c | ||
| acpiphp_ibm.c | ||
| acpiphp.h | ||
| cpci_hotplug_core.c | ||
| cpci_hotplug_pci.c | ||
| cpci_hotplug.h | ||
| cpcihp_generic.c | ||
| cpcihp_zt5550.c | ||
| cpcihp_zt5550.h | ||
| cpqphp_core.c | ||
| cpqphp_ctrl.c | ||
| cpqphp_nvram.c | ||
| cpqphp_nvram.h | ||
| cpqphp_pci.c | ||
| cpqphp_sysfs.c | ||
| cpqphp.h | ||
| ibmphp_core.c | ||
| ibmphp_ebda.c | ||
| ibmphp_hpc.c | ||
| ibmphp_pci.c | ||
| ibmphp_res.c | ||
| ibmphp.h | ||
| Kconfig | ||
| Makefile | ||
| pci_hotplug_core.c | ||
| pciehp_core.c | ||
| pciehp_ctrl.c | ||
| pciehp_hpc.c | ||
| pciehp_pci.c | ||
| pciehp.h | ||
| pcihp_skeleton.c | ||
| pnv_php.c | ||
| rpadlpar_core.c | ||
| rpadlpar_sysfs.c | ||
| rpadlpar.h | ||
| rpaphp_core.c | ||
| rpaphp_pci.c | ||
| rpaphp_slot.c | ||
| rpaphp.h | ||
| s390_pci_hpc.c | ||
| sgi_hotplug.c | ||
| shpchp_core.c | ||
| shpchp_ctrl.c | ||
| shpchp_hpc.c | ||
| shpchp_pci.c | ||
| shpchp_sysfs.c | ||
| shpchp.h | ||