On Thu, Feb 20, 2014 at 11:43 PM, Jiang Liu <jiang....@linux.intel.com> wrote:
>
>
> On 2014/1/3 8:05, 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.
>>
>> -v2: According to Sebastian, add cc to stable.
>>
>> Signed-off-by: Yinghai Lu <ying...@kernel.org>
>> Cc: Joerg Roedel <j...@8bytes.org>
>> Cc: Donald Dutile <ddut...@redhat.com>
>> Acked-by: Donald Dutile <ddut...@redhat.com>
>> Cc: Sebastian Andrzej Siewior <sebast...@breakpoint.cc>
>> Cc: sta...@vger.kernel.org
>> ---
>> 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 8b452c9..f4eaa50 100644
>> --- a/drivers/iommu/dmar.c
>> +++ b/drivers/iommu/dmar.c
>> @@ -1277,7 +1277,7 @@ int dmar_set_interrupt(struct intel_iommu *iommu)
>> if (iommu->irq)
>> return 0;
>>
>> - irq = create_irq();
>> + irq = create_irq_nr(0, iommu->node);
> Hi Yinghai,
> How about create_irq_nrq(1, iommu->node) here to clearly state
> that 0 is not a valid irq number for dmar here?
Should be the same. that 0 or 1 will be from in __create_irqs().
And we have
if (from < nr_irqs_gsi)
from = nr_irqs_gsi;
in __create_irqs().
Thanks
Yinghai
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