powerpc/pci: Remove VFs prior to PF

As commit ac205b7bb72f ("PCI: make sriov work with hotplug remove")
indicates, VFs which is on the same PCI bus as their PF, should be
removed before the PF. Otherwise, we might run into kernel crash
at PCI unplugging time.

This applies the above pattern to powerpc PCI hotplug path.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c
index 7f9ed0c1f6b93d88dc4b3d8e815b7e1c099b1f82..59c436189f466fbef0119378028184198ca5a863 100644 (file)
--- a/arch/powerpc/kernel/pci-hotplug.c
+++ b/arch/powerpc/kernel/pci-hotplug.c
@@ -55,7 +55,7 @@ void pcibios_remove_pci_devices(struct pci_bus *bus)
 
        pr_debug("PCI: Removing devices on bus %04x:%02x\n",
                 pci_domain_nr(bus),  bus->number);
-       list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
+       list_for_each_entry_safe_reverse(dev, tmp, &bus->devices, bus_list) {
                pr_debug("   Removing %s...\n", pci_name(dev));
                pci_stop_and_remove_bus_device(dev);
        }