iommu/amd: Fix error return code in irq_remapping_alloc()

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.lk@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index bf5ec0c8f95e..2bcaca53aba5 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;
         }