From 36b6c1013d11e03d70b0b7e74d2e90fffa8a2d8a Mon Sep 17 00:00:00 2001
From: Jan Kiszka <jan.kiszka@web.de>
Date: Wed, 2 Jun 2010 17:19:55 -0300
Subject: Avoid crash on '-usbdevice <device>' without parameters

Many usbdevice_init implementors assume params is non-NULL.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 702f3e0fb52c124c07f215426eeadb70a716643f)
---
 hw/usb-bus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/usb-bus.c b/hw/usb-bus.c
index 7c823147a..3bb89862b 100644
--- a/hw/usb-bus.c
+++ b/hw/usb-bus.c
@@ -264,7 +264,8 @@ USBDevice *usbdevice_create(const char *cmdline)
     USBBus *bus = usb_bus_find(-1 /* any */);
     DeviceInfo *info;
     USBDeviceInfo *usb;
-    char driver[32], *params;
+    char driver[32];
+    const char *params;
     int len;
 
     params = strchr(cmdline,':');
@@ -275,6 +276,7 @@ USBDevice *usbdevice_create(const char *cmdline)
             len = sizeof(driver);
         pstrcpy(driver, len, cmdline);
     } else {
+        params = "";
         pstrcpy(driver, sizeof(driver), cmdline);
     }
 
-- 
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