Subject: Re: [PATCH V7 03/10] powerpc/pci: Remove VFs prior to PF

From: Bjorn Helgaas <[email-masked]>
Date: Mon, 1 Jun 2015 18:20:05 -0500

On Tue, May 19, 2015 at 06:50:05PM +0800, Wei Yang wrote:
> As commit ac205b7b ("PCI: make sriov work with hotplug remove") indicates,

The conventional reference is:

  ac205b7bb72f ("PCI: make sriov work with hotplug remove")

> VFs, which might be hooked to same PCI bus as their PF should be removed
> before the PF. Otherwise, the PCI hot unplugging on the PCI bus would
> cause kernel crash.
> 
> The patch applies the above pattern to PowerPC PCI hotplug path.
> 
> [gwshan: changelog]
> Signed-off-by: Wei Yang <[email-masked]>
> Acked-by: Gavin Shan <[email-masked]>
> ---
>  arch/powerpc/kernel/pci-hotplug.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c
> index 7ed85a6..98f84ed 100644
> --- a/arch/powerpc/kernel/pci-hotplug.c
> +++ b/arch/powerpc/kernel/pci-hotplug.c
> @@ -50,7 +50,7 @@ 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);
>  	}
> -- 
> 1.7.9.5
>