[PATCH 10/27] vfio/spapr.c: use QOM casts where appropriate

[Mark Cave-Ayland]

Use QOM casts to convert between VFIOSpaprContainer and VFIOLegacyContainer
instead of accessing bcontainer directly.

Signed-off-by: Mark Cave-Ayland <mark.caveayl...@nutanix.com>
---
 hw/vfio/spapr.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index acaa9c1419..c883ba6da9 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -61,7 +61,7 @@ static void vfio_prereg_listener_region_add(MemoryListener 
*listener,
 {
     VFIOSpaprContainer *scontainer = container_of(listener, VFIOSpaprContainer,
                                                   prereg_listener);
-    VFIOLegacyContainer *container = &scontainer->container;
+    VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(scontainer);
     VFIOContainer *bcontainer = VFIO_IOMMU(container);
     const hwaddr gpa = section->offset_within_address_space;
     hwaddr end;
@@ -121,7 +121,7 @@ static void vfio_prereg_listener_region_del(MemoryListener 
*listener,
 {
     VFIOSpaprContainer *scontainer = container_of(listener, VFIOSpaprContainer,
                                                   prereg_listener);
-    VFIOLegacyContainer *container = &scontainer->container;
+    VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(scontainer);
     const hwaddr gpa = section->offset_within_address_space;
     hwaddr end;
     int ret;
@@ -245,8 +245,7 @@ static bool vfio_spapr_create_window(VFIOLegacyContainer 
*container,
 {
     int ret = 0;
     VFIOContainer *bcontainer = VFIO_IOMMU(container);
-    VFIOSpaprContainer *scontainer = container_of(container, 
VFIOSpaprContainer,
-                                                  container);
+    VFIOSpaprContainer *scontainer = VFIO_IOMMU_SPAPR(bcontainer);
     IOMMUMemoryRegion *iommu_mr = IOMMU_MEMORY_REGION(section->mr);
     uint64_t pagesize = memory_region_iommu_get_min_page_size(iommu_mr), 
pgmask;
     unsigned entries, bits_total, bits_per_level, max_levels, ddw_levels;
@@ -353,8 +352,7 @@ vfio_spapr_container_add_section_window(VFIOContainer 
*bcontainer,
                                         Error **errp)
 {
     VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(bcontainer);
-    VFIOSpaprContainer *scontainer = container_of(container, 
VFIOSpaprContainer,
-                                                  container);
+    VFIOSpaprContainer *scontainer = VFIO_IOMMU_SPAPR(container);
     VFIOHostDMAWindow *hostwin;
     hwaddr pgsize = 0;
     int ret;
@@ -443,8 +441,7 @@ vfio_spapr_container_del_section_window(VFIOContainer 
*bcontainer,
                                         MemoryRegionSection *section)
 {
     VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(bcontainer);
-    VFIOSpaprContainer *scontainer = container_of(container, 
VFIOSpaprContainer,
-                                                  container);
+    VFIOSpaprContainer *scontainer = VFIO_IOMMU_SPAPR(container);
 
     if (container->iommu_type != VFIO_SPAPR_TCE_v2_IOMMU) {
         return;
@@ -464,8 +461,7 @@ vfio_spapr_container_del_section_window(VFIOContainer 
*bcontainer,
 static void vfio_spapr_container_release(VFIOContainer *bcontainer)
 {
     VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(bcontainer);
-    VFIOSpaprContainer *scontainer = container_of(container, 
VFIOSpaprContainer,
-                                                  container);
+    VFIOSpaprContainer *scontainer = VFIO_IOMMU_SPAPR(container);
     VFIOHostDMAWindow *hostwin, *next;
 
     if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
@@ -482,8 +478,7 @@ static bool vfio_spapr_container_setup(VFIOContainer 
*bcontainer,
                                        Error **errp)
 {
     VFIOLegacyContainer *container = VFIO_IOMMU_LEGACY(bcontainer);
-    VFIOSpaprContainer *scontainer = container_of(container, 
VFIOSpaprContainer,
-                                                  container);
+    VFIOSpaprContainer *scontainer = VFIO_IOMMU_SPAPR(container);
     struct vfio_iommu_spapr_tce_info info;
     bool v2 = container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU;
     int ret, fd = container->fd;
-- 
2.43.0