intel-iommu: dmar_set_interrupt return error value

dmar_set_interrupt feigns success when arch_setup_dmar_msi
fails, return error value.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index faf77a0..f23460a 100644 (file)
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -1088,7 +1088,7 @@ int dmar_set_interrupt(struct intel_iommu *iommu)
                set_irq_data(irq, NULL);
                iommu->irq = 0;
                destroy_irq(irq);
-               return 0;
+               return ret;
        }
 
        ret = request_irq(irq, dmar_fault, 0, iommu->name, iommu);