[PATCH -next] vfio/type1: fix error return code in vfio_iommu_type1_attach_group()

[Wei Yongjun <weiyj.lk@xxxxxxxxx>]

From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 drivers/vfio/vfio_iommu_type1.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 0f353f5..bd6f293 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);