vfio/type1: remove duplicate retrieval of reserved regions

As we now already have the reserved regions list, just pass that into
vfio_iommu_has_sw_msi() fn.
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/vfio/vfio_iommu_type1.c

@@ -1296,15 +1296,13 @@ static struct vfio_group *find_iommu_group(struct vfio_domain *domain,
 	return NULL;
 }
 
-static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base)
+static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions,
+				  phys_addr_t *base)
 {
-	struct list_head group_resv_regions;
-	struct iommu_resv_region *region, *next;
+	struct iommu_resv_region *region;
 	bool ret = false;
 
-	INIT_LIST_HEAD(&group_resv_regions);
-	iommu_get_group_resv_regions(group, &group_resv_regions);
-	list_for_each_entry(region, &group_resv_regions, list) {
+	list_for_each_entry(region, group_resv_regions, list) {
 		/*
 		 * The presence of any 'real' MSI regions should take
 		 * precedence over the software-managed one if the
@@ -1320,8 +1318,7 @@ static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base)
 			ret = true;
 		}
 	}
-	list_for_each_entry_safe(region, next, &group_resv_regions, list)
-		kfree(region);
+
 	return ret;
 }
 
@@ -1768,7 +1765,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
 	if (ret)
 		goto out_detach;
 
-	resv_msi = vfio_iommu_has_sw_msi(iommu_group, &resv_msi_base);
+	resv_msi = vfio_iommu_has_sw_msi(&group_resv_regions, &resv_msi_base);
 
 	INIT_LIST_HEAD(&domain->group_list);
 	list_add(&group->next, &domain->group_list);