Fix coverity defect: DIVIDE_BY_ZERO.

Signed-off-by: Jamin Lin <jamin_...@aspeedtech.com>
---
 hw/arm/aspeed_ast27x0.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c
index b6876b4862..d14a46df6f 100644
--- a/hw/arm/aspeed_ast27x0.c
+++ b/hw/arm/aspeed_ast27x0.c
@@ -211,6 +211,12 @@ static void aspeed_ram_capacity_write(void *opaque, hwaddr 
addr, uint64_t data,
     ram_size = object_property_get_uint(OBJECT(&s->sdmc), "ram-size",
                                         &error_abort);
 
+    if (!ram_size) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: ram_size is zero",  __func__);
+        return;
+    }
+
     /*
      * Emulate ddr capacity hardware behavior.
      * If writes the data to the address which is beyond the ram size,
-- 
2.34.1


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