Re: [patch 21/33] genirq/msi: Provide msi_domain_alloc_irq_at()

[Reinette Chatre]

Hi Thomas,

On 11/18/2022 2:31 PM, Thomas Gleixner wrote:
> On Fri, Nov 18 2022 at 10:18, Reinette Chatre wrote:
>>> @@ -141,7 +141,7 @@ static int msi_insert_desc(struct device *dev, struct msi_desc *desc,
>>>  		if (ret)
>>>  			goto fail;
>>>  
>>> -		desc->msi_index = index;
>>> +		desc->msi_index = index - baseidx;
>>
>> Could msi_desc->msi_index be made bigger? The hardware I am testing
>> on claims to support more IMS entries than what the u16 can
>> accommodate.
> 
> Sure that's trivial. How big does it claim it is?

2048

> I assume your sequence is:
> 
>   pci_ims_alloc();
>   request_irq();        <- This creates it
>   free_irq();           <- This removes it
>   pci_ims_free();
> 
> Right?

No. My mistake. Sorry for the noise.

Reinette