qemu-file: Only set last_error if it is not already set

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/savevm.c b/savevm.c
index 4e970ca0db47ddc26300506c04d718b5848a7194..611e997d42d0690272d1a43b7bbc48389d16fa05 100644 (file)
--- a/savevm.c
+++ b/savevm.c
@@ -419,7 +419,9 @@ int qemu_file_get_error(QEMUFile *f)
 
 static void qemu_file_set_error(QEMUFile *f, int ret)
 {
-    f->last_error = ret;
+    if (f->last_error == 0) {
+        f->last_error = ret;
+    }
 }
 
 /** Flushes QEMUFile buffer