As reported by kbuild test robot:
	drivers/media/usb/cx231xx/cx231xx-audio.c:445:16-20: ERROR: dev is NULL but dereferenced.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
        dev_dbg(dev->dev,
                "opening device and trying to acquire exclusive lock\n");
 
-       if (!dev) {
-               dev_err(dev->dev,
-                       "BUG: cx231xx can't find device struct. Can't proceed with open\n");
-               return -ENODEV;
-       }
-
        if (dev->state & DEV_DISCONNECTED) {
                dev_err(dev->dev,
                        "Can't open. the device was removed.\n");