Unsigned cx23417_mailbox cannot be negative
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
                        printk(KERN_ERR "%s() f/w load failed\n", __func__);
                        return retval;
                }
-               dev->cx23417_mailbox = cx23885_find_mailbox(dev);
-               if (dev->cx23417_mailbox < 0) {
+               retval = cx23885_find_mailbox(dev);
+               if (retval < 0) {
                        printk(KERN_ERR "%s() mailbox < 0, error\n",
                                __func__);
                        return -1;
                }
+               dev->cx23417_mailbox = retval;
                retval = cx23885_api_cmd(dev, CX2341X_ENC_PING_FW, 0, 0);
                if (retval < 0) {
                        printk(KERN_ERR