Re: [PATCH -v11 05/30] PCI: Add busn_res operation functions

[Yinghai Lu]

On Mon, Apr 30, 2012 at 4:29 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
> On Sun, Mar 18, 2012 at 11:42 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
>> +void pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max)
>> +{
>> +       struct resource *res = &b->busn_res;
>> +       struct resource old_res = *res;
>> +
>> +       res->end = bus_max;
>
> I've mentioned before that I'm not comfortable with updating the
> struct resource after it's been inserted into the tree.  If you want
> to do an in-place update, I think you need to add a new interface in
> kernel/resource.c so it can make sure the resource tree remains
> consistent.

ok, will add one function in kernel/resource.c to make sure that end
could be updated safely
by checking parent and children.
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