On Thu, 25 Sep 2014, Thierry Reding wrote:
> On Thu, Sep 25, 2014 at 11:14:11AM +0800, Yijing Wang wrote:
> > Msi_chip functions setup_irq/teardown_irq rarely use msi_chip
> > argument.
>
> That's not true. Out of the four drivers that you modify two use the
> parameter. And the two that don't probably should be using it too.
>
> 50% is not "rarely". =)
>
> > We can look up msi_chip pointer by the device pointer
> > or irq number, so clean up msi_chip argument.
>
> I don't like this particular change. The idea was to keep the API object
> oriented so that drivers wouldn't have to know where to get the MSI chip
> from. It also makes it more resilient against code reorganizations since
> the core code is the only place that needs to know where to get the chip
> from.
Right. We have the same thing in the irq_chip callbacks. All of them
take "struct irq_data", because it's already available in the core
code and it gives easy access to all information (chip, chipdata ...)
which is necessary for the callback implementations.
Thanks,
tglx
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
