SerialMM inherits from SysBusDevice and exposes the memory region by
means of sysbus_mmio_get_region(). Use that in order to avoid accessing
implementation details of SerialMM.

Signed-off-by: Bernhard Beschow <[email protected]>
---
 hw/arm/aspeed_ast27x0-ssp.c | 7 ++++---
 hw/arm/aspeed_ast27x0-tsp.c | 7 ++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/hw/arm/aspeed_ast27x0-ssp.c b/hw/arm/aspeed_ast27x0-ssp.c
index 9b12ba6743..8b84300e0f 100644
--- a/hw/arm/aspeed_ast27x0-ssp.c
+++ b/hw/arm/aspeed_ast27x0-ssp.c
@@ -149,6 +149,7 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState 
*dev_soc, Error **errp)
     AspeedCoprocessorState *s = ASPEED_COPROCESSOR(dev_soc);
     AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
     DeviceState *armv7m;
+    MemoryRegion *mr;
     g_autofree char *sdram_name = NULL;
     int i;
 
@@ -230,9 +231,9 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState 
*dev_soc, Error **errp)
     }
 
     /* UART */
-    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias",
-                             &s->uart->serial.io, 0,
-                             memory_region_size(&s->uart->serial.io));
+    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(s->uart), 0);
+    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias", mr, 0,
+                             memory_region_size(mr));
     memory_region_add_subregion(s->memory, sc->memmap[s->uart_dev],
                                 &s->uart_alias);
     /*
diff --git a/hw/arm/aspeed_ast27x0-tsp.c b/hw/arm/aspeed_ast27x0-tsp.c
index e39d1dc171..e7c7b74491 100644
--- a/hw/arm/aspeed_ast27x0-tsp.c
+++ b/hw/arm/aspeed_ast27x0-tsp.c
@@ -149,6 +149,7 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState 
*dev_soc, Error **errp)
     AspeedCoprocessorState *s = ASPEED_COPROCESSOR(dev_soc);
     AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
     DeviceState *armv7m;
+    MemoryRegion *mr;
     g_autofree char *sdram_name = NULL;
     int i;
 
@@ -230,9 +231,9 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState 
*dev_soc, Error **errp)
     }
 
     /* UART */
-    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias",
-                             &s->uart->serial.io, 0,
-                             memory_region_size(&s->uart->serial.io));
+    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(s->uart), 0);
+    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias", mr, 0,
+                             memory_region_size(mr));
     memory_region_add_subregion(s->memory, sc->memmap[s->uart_dev],
                                 &s->uart_alias);
     /*
-- 
2.53.0


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