[PATCH -next] iommu/amd: Fix error return code in irq_remapping_alloc()

[Wei Yongjun]

Fix to return a negative error code from the alloc_irq_index() error
handling case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <weiyj...@gmail.com>
---
 drivers/iommu/amd_iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 96de97a..71e94f3 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3886,6 +3886,7 @@ static int irq_remapping_alloc(struct irq_domain *domain, 
unsigned int virq,
        }
        if (index < 0) {
                pr_warn("Failed to allocate IRTE\n");
+               ret = index;
                goto out_free_parent;
        }