Re: [PATCH 08/28] PCI: Introduce pci_host_assign_domain_nr() to assign domain

Yijing Wang
2015-01-19T10:56:26Z

On 2015/1/19 17:50, Arnd Bergmann wrote:
> On Monday 19 January 2015 10:14:44 Yijing Wang wrote:
>>>> I'm confused: the same code is already part of the PCI tree, but with
>>>> Lorenzo Pieralisi listed as the patch author. The code is good,
>>>> and I acked it in the past, but one of you is (probably by accident)
>>>> misattributing the patch.
>>>>
>>>> Assuming that the patch that is already merged in next is the right
>>>> one, I think you should rebase your series on top of
>>>>
>>>> git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git#next
>>>>
>>>> to avoid conflicts like this one.
>>>>
>>>
>>> I think I just got confused because the code duplicates most of
>>> pci_bus_assign_domain_nr(). Maybe this can be done in a better way
>>> by splitting the existing function into
>>>
>>> static int pci_assign_domain_nr(struct device *)
>>> {
>>> ... /* most of pci_bus_assign_domain_nr */
>>>
>>> return domain;
>>> }
>>>
>>> void pci_host_assign_domain_nr(struct pci_host_bridge *host)
>>> {
>>> host->domain = pci_assign_domain_nr(host->dev.parent);
>>> }
>>>
>>> void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
>>> {
>>> bus->domain_nr = pci_assign_domain_nr(parent);
>>> }
>>>
>>
>> Hi Arnd,
>> I kept the almost duplicated pci_host_assign_domain_nr() and
>> pci_bus_assign_domain_nr() here for building happy, because now
>> platform specific pci_domain_nr() still exists which may get domain
>> number from pci_bus. pci_bus_assign_domain_nr() will be removed in
>> the last patch.
>>
>
> I'm not sure I get your point: the approach I showed above seems to have
> the same effect, except it doesn't duplicate code temporarily, which
> makes it less error-prone in case your patch gets merged at the
> same time as another patch that modifies pci_bus_assign_domain_nr.

OK, I got it, will update it, thanks!

Thanks!
Yijing.

>
> Arnd
>
> .
>

--
Thanks!
Yijing