[Qemu-devel] [PATCH] memory: Return -1 again on reads from unsigned regions

[Jan Kiszka <jan.kiszka@siemens.com>]

This restore the behavior prior to b018ddf633 which accidentally changed
the return code to 0. Specifically guests probing for register existence
were affected by this.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 memory.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/memory.c b/memory.c
index 757e9a5..d19b61b 100644
--- a/memory.c
+++ b/memory.c
@@ -859,7 +859,7 @@ static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
         cpu_unassigned_access(ENV_GET_CPU(cpu_single_env),
                               addr, false, false, 0, size);
     }
-    return 0;
+    return -1ULL;
 }
 
 static void unassigned_mem_write(void *opaque, hwaddr addr,
-- 
1.7.3.4