From 542379f42642179cea33571c2799ca6fd03bf452 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Tue, 8 Nov 2011 11:00:38 +0100
Subject: [PATCH] qdev: Fix crash on -device '?=x'

Spotted by Coverity.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
---
 hw/qdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/qdev.c b/hw/qdev.c
index 50976dd..106407f 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -186,7 +186,7 @@ int qdev_device_help(QemuOpts *opts)
         return 1;
     }
 
-    if (!qemu_opt_get(opts, "?")) {
+    if (!driver || !qemu_opt_get(opts, "?")) {
         return 0;
     }
 
-- 
2.7.4