Staging: comedi: check the return value of kobject_set_name

Added a check of the return value of the kobject_set_name function.
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_fops.c

@@ -2587,7 +2587,14 @@ static int __init comedi_init(void)
 		return -EIO;
 	cdev_init(&comedi_cdev, &comedi_fops);
 	comedi_cdev.owner = THIS_MODULE;
-	kobject_set_name(&comedi_cdev.kobj, "comedi");
+
+	retval = kobject_set_name(&comedi_cdev.kobj, "comedi");
+	if (retval) {
+		unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
+					 COMEDI_NUM_MINORS);
+		return retval;
+	}
+
 	if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) {
 		unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
 					 COMEDI_NUM_MINORS);