[patch 11/32] iommu: dmar: Fix return value check of create_irq()

[Thomas Gleixner]

ia64 returns a negative error code when allocation fails andx86
returns 0. Make it handle both.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: linux-ia64@xxxxxxxxxxxxxxx
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
---
 drivers/iommu/dmar.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: tip/drivers/iommu/dmar.c
===================================================================
--- tip.orig/drivers/iommu/dmar.c
+++ tip/drivers/iommu/dmar.c
@@ -1551,7 +1551,7 @@ int dmar_set_interrupt(struct intel_iomm
 		return 0;
 
 	irq = create_irq();
-	if (!irq) {
+	if (irq <= 0) {
 		pr_err("IOMMU: no free vectors\n");
 		return -EINVAL;
 	}


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