linux-kernel - Re: [PATCH v2 08/26] iommu, irq: Allocate irq_desc for dmar

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Date:	Fri, 8 Feb 2013 12:58:02 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Don Dutile <ddutile@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH v2 08/26] iommu, irq: Allocate irq_desc for dmar_msi with
 local node

On Fri, Feb 8, 2013 at 12:45 PM, Don Dutile <ddutile@...hat.com> wrote:
> On 02/08/2013 02:28 PM, Yinghai Lu wrote:
>>
>> iommu irq's irq_desc should be on local node ram.
>>
>> Fix the return value checking problem.
>>
>> create_irq() will return -1 when fail to allocate.
>> create_irq_nr() will return 0 when fail to allocate.
>>
>> here only check !irq, so need to change it to use create_irq_nr instead.
>>
>> Signed-off-by: Yinghai Lu<yinghai@...nel.org>
>> Cc: Joerg Roedel<joro@...tes.org>
>> Cc: Donald Dutile<ddutile@...hat.com>
>> ---
>>   drivers/iommu/dmar.c |    2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
>> index 174bb65..316b5a2 100644
>> --- a/drivers/iommu/dmar.c
>> +++ b/drivers/iommu/dmar.c
>> @@ -1263,7 +1263,7 @@ int dmar_set_interrupt(struct intel_iommu *iommu)
>>         if (iommu->irq)
>>                 return 0;
>>
>> -       irq = create_irq();
>> +       irq = create_irq_nr(0, iommu->node);
>>         if (!irq) {
>>                 pr_err("IOMMU: no free vectors\n");
>>                 return -EINVAL;
>
> Good catch!
>
> you can add my ack to it.
>

Thanks.
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