[PATCH for-5.0] vl.c: error out if -mem-path is used together with -M memory-backend

[Igor Mammedov]

the former is not actually used by explicit backend, so instead of
silently ignoring the option in non valid context, exit with error.

Signed-off-by: Igor Mammedov <address@hidden>
---
 softmmu/vl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/softmmu/vl.c b/softmmu/vl.c
index 58a40bcfc1..32c0047889 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -4315,6 +4315,11 @@ void qemu_init(int argc, char **argv, char **envp)
                              "explicitly specified 'memory-backend' property");
                 exit(EXIT_FAILURE);
         }
+        if (mem_path) {
+            error_report("'-mem-path' can't be used together with"
+                         "'-machine memory-backend'");
+            exit(EXIT_FAILURE);
+        }
         ram_size = backend_size;
     }
 
-- 
2.18.1