hw/usb/dev-serial: Do not try to set vendorid or productid properties

When starting QEMU with the legacy USB serial device like this:

 qemu-system-x86_64 -usbdevice serial:vendorid=0x1234:stdio

it currently aborts since the vendorid property does not exist
anymore (it has been removed by commit f29783f72ea77dfbd7ea0c9):

 Unexpected error in object_property_find() at qemu/qom/object.c:1008:
 qemu-system-x86_64: -usbdevice serial:vendorid=0x1234:stdio: Property
                     '.vendorid' not found
 Aborted (core dumped)

Fix this crash by issuing a more friendly error message instead
(and simplify the code also a little bit this way).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1493883704-27604-1-git-send-email-thuth@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/usb/dev-serial.c

@@ -513,27 +513,18 @@ static USBDevice *usb_serial_init(USBBus *bus, const char *filename)
 {
     USBDevice *dev;
     Chardev *cdrv;
-    uint32_t vendorid = 0, productid = 0;
     char label[32];
     static int index;
 
     while (*filename && *filename != ':') {
         const char *p;
-        char *e;
+
         if (strstart(filename, "vendorid=", &p)) {
-            vendorid = strtol(p, &e, 16);
-            if (e == p || (*e && *e != ',' && *e != ':')) {
-                error_report("bogus vendor ID %s", p);
-                return NULL;
-            }
-            filename = e;
+            error_report("vendorid is not supported anymore");
+            return NULL;
         } else if (strstart(filename, "productid=", &p)) {
-            productid = strtol(p, &e, 16);
-            if (e == p || (*e && *e != ',' && *e != ':')) {
-                error_report("bogus product ID %s", p);
-                return NULL;
-            }
-            filename = e;
+            error_report("productid is not supported anymore");
+            return NULL;
         } else {
             error_report("unrecognized serial USB option %s", filename);
             return NULL;
@@ -554,10 +545,7 @@ static USBDevice *usb_serial_init(USBBus *bus, const char *filename)
 
     dev = usb_create(bus, "usb-serial");
     qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
-    if (vendorid)
-        qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
-    if (productid)
-        qdev_prop_set_uint16(&dev->qdev, "productid", productid);
+
     return dev;
 }