The RAM size of the SDMC device is validated for the SoC and set when
the Aspeed machines are initialized and then later used by several
SoC implementations. However, the SDMC model never checks that the RAM
size has been actually set before being used. Do that at realize.

Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Jamin_lin < jamin_lin@aspeedtech.com>
---
 hw/misc/aspeed_sdmc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/misc/aspeed_sdmc.c b/hw/misc/aspeed_sdmc.c
index 93e2e29ead87..44da085e10cb 100644
--- a/hw/misc/aspeed_sdmc.c
+++ b/hw/misc/aspeed_sdmc.c
@@ -271,6 +271,12 @@ static void aspeed_sdmc_realize(DeviceState *dev, Error **errp)
     AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);
 
     assert(asc->max_ram_size < 4 * GiB || asc->is_bus64bit);
+
+    if (!s->ram_size) {
+        error_setg(errp, "RAM size is not set");
+        return;
+    }
+
     s->max_ram_size = asc->max_ram_size;
 
     memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_sdmc_ops, s,
-- 
2.45.2