[PATCH v4 10/28] iommu, irq: Allocate irq_desc for dmar_msi with local node

[Yinghai Lu <yinghai@kernel.org>]

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@kernel.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Donald Dutile <ddutile@redhat.com>
Acked-by: Donald Dutile <ddutile@redhat.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: stable@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 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;
-- 
1.8.1.4