2013-03-05 02:41:50

by Paul Mundt

Subject: Re: [PATCH 2/3] irq: Add hw continuous IRQs map to virtual continuous IRQs support

On Tue, Jan 15, 2013 at 03:38:55PM +0800, Mike Qiu wrote:
> Adding a function irq_create_mapping_many() which can associate
> multiple MSIs to a continous irq mapping.
>
> This is needed to enable multiple MSI support for pSeries.
>
> +int irq_create_mapping_many(struct irq_domain *domain,
> + irq_hw_number_t hwirq_base, int count)
> +{

Other than the other review comments already made, I think you can
simplify this considerably by simply doing what irq_create_strict_mappings() does,
and relaxing the irq_base requirements.

In any event, as you are creating a new interface, I don't think you want
to carry around half of the legacy crap that irq_create_mapping() has to
deal with. We made the decision to avoid this with irq_create_strict_mappings()
intentionally, too.

2013-03-05 07:44:21

by Mike Qiu

Subject: Re: [PATCH 2/3] irq: Add hw continuous IRQs map to virtual continuous IRQs support

于 2013/3/5 10:41, Paul Mundt 写道:
> On Tue, Jan 15, 2013 at 03:38:55PM +0800, Mike Qiu wrote:
>> Adding a function irq_create_mapping_many() which can associate
>> multiple MSIs to a continous irq mapping.
>>
>> This is needed to enable multiple MSI support for pSeries.
>>
>> +int irq_create_mapping_many(struct irq_domain *domain,
>> + irq_hw_number_t hwirq_base, int count)
>> +{
> Other than the other review comments already made, I think you can
> simplify this considerably by simply doing what irq_create_strict_mappings() does,
> and relaxing the irq_base requirements.
>
> In any event, as you are creating a new interface, I don't think you want
> to carry around half of the legacy crap that irq_create_mapping() has to
> deal with. We made the decision to avoid this with irq_create_strict_mappings()
> intentionally, too.
>
Oh, yes, you are right, I will send out V2 of my patch to make it more
comfortable , and hope you can review my patch again

Thanks

Mike