vfio/type1: Fix error return code in vfio_iommu_type1_attach_group()

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

Fixes: 5d704992189f ("vfio/type1: Allow transparent MSI IOVA allocation")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 0f353f519574..bd6f293c4ebd 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1332,8 +1332,11 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
         if (ret)
                 goto out_detach;
 
-        if (resv_msi && iommu_get_msi_cookie(domain->domain, resv_msi_base))
-                goto out_detach;
+        if (resv_msi) {
+                ret = iommu_get_msi_cookie(domain->domain, resv_msi_base);
+                if (ret)
+                        goto out_detach;
+        }
 
         list_add(&domain->next, &iommu->domain_list);