[PATCH 10/28] iommu, irq: Allocate irq_desc for dmar_msi with local node

From: Yinghai Lu
Date: Sat Aug 10 2013 - 22:47:23 EST

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 <yinghai@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Donald Dutile <ddutile@xxxxxxxxxx>
Acked-by: Donald Dutile <ddutile@xxxxxxxxxx>
Cc: Sebastian Andrzej Siewior <sebastian@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
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 785675a..db41e36 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);
if (!irq) {
pr_err("IOMMU: no free vectors\n");
return -EINVAL;

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