[Qemu-devel] [RFC PATCH v1 06/11] memory: address_space_init: do nothing if no root region given

[Peter Crosthwaite]

Just ignore this case. This is need for bus master device realize
when the machine model doesn't connect an attachment. Then machine
model may decide to not set a memory region for mastering yet the
device will attempt to create itself an address space come realize
time. Gracefully do nothing.

Signed-off-by: Peter Crosthwaite <address@hidden>
---

 memory.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/memory.c b/memory.c
index 9192941..6f5e0e5 100644
--- a/memory.c
+++ b/memory.c
@@ -1936,6 +1936,10 @@ void address_space_init(AddressSpace *as, MemoryRegion 
*root, const char *name)
         memory_init();
     }
 
+    if (!root) {
+        return;
+    }
+
     memory_region_transaction_begin();
     as->root = root;
     as->current_map = g_new(FlatView, 1);
-- 
2.0.0