[PATCH 4/6] hw/dma: Replace alloc() + address_space_init() by address_space_create()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Replace g_malloc0() + address_space_init() by address_space_create().
Release the resource in DeviceUnrealize().

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/dma/xlnx-zdma.c    | 15 +++++++++------
 hw/dma/xlnx_csu_dma.c |  9 ++-------
 2 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c
index fa38a556341..9f6b3fa47c6 100644
--- a/hw/dma/xlnx-zdma.c
+++ b/hw/dma/xlnx-zdma.c
@@ -777,15 +777,17 @@ static void zdma_realize(DeviceState *dev, Error **errp)
         };
     }
 
-    if (s->dma_mr) {
-        s->dma_as = g_malloc0(sizeof(AddressSpace));
-        address_space_init(s->dma_as, s->dma_mr, NULL);
-    } else {
-        s->dma_as = &address_space_memory;
-    }
+    s->dma_as = address_space_create(s->dma_mr ?: get_system_memory(), NULL);
     s->attr = MEMTXATTRS_UNSPECIFIED;
 }
 
+static void zdma_unrealize(DeviceState *dev)
+{
+    XlnxZDMA *s = XLNX_ZDMA(dev);
+
+    address_space_destroy(s->dma_as);
+}
+
 static void zdma_init(Object *obj)
 {
     XlnxZDMA *s = XLNX_ZDMA(obj);
@@ -827,6 +829,7 @@ static void zdma_class_init(ObjectClass *klass, void *data)
 
     dc->reset = zdma_reset;
     dc->realize = zdma_realize;
+    dc->unrealize = zdma_unrealize;
     device_class_set_props(dc, zdma_props);
     dc->vmsd = &vmstate_zdma;
 }
diff --git a/hw/dma/xlnx_csu_dma.c b/hw/dma/xlnx_csu_dma.c
index 0c1c19cab5a..730c0f999ce 100644
--- a/hw/dma/xlnx_csu_dma.c
+++ b/hw/dma/xlnx_csu_dma.c
@@ -648,13 +648,7 @@ static void xlnx_csu_dma_realize(DeviceState *dev, Error **errp)
     s->src_timer = ptimer_init(xlnx_csu_dma_src_timeout_hit,
                                s, PTIMER_POLICY_DEFAULT);
 
-    if (s->dma_mr) {
-        s->dma_as = g_malloc0(sizeof(AddressSpace));
-        address_space_init(s->dma_as, s->dma_mr, NULL);
-    } else {
-        s->dma_as = &address_space_memory;
-    }
-
+    s->dma_as = address_space_create(s->dma_mr ?: get_system_memory(), NULL);
     s->attr = MEMTXATTRS_UNSPECIFIED;
 
     s->r_size_last_word = 0;
@@ -665,6 +659,7 @@ static void xlnx_csu_dma_unrealize(DeviceState *dev)
     XlnxCSUDMA *s = XLNX_CSU_DMA(dev);
 
     ptimer_free(s->src_timer);
+    address_space_destroy(s->dma_as);
 }
 
 static const VMStateDescription vmstate_xlnx_csu_dma = {
-- 
2.31.1