USB: g_printer: fix bug in unregistration

The allocated chardevice region range is only 1 device but on
unregister it currently tries to deregister 2.

Found this while doing a insmod/rmmod/insmod/rm... of the module
which seemed to eat major numbers.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 68a0efb..65a8834 100644 (file)
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1594,7 +1594,7 @@ cleanup(void)
        if (status)
                ERROR(dev, "usb_gadget_unregister_driver %x\n", status);
 
-       unregister_chrdev_region(g_printer_devno, 2);
+       unregister_chrdev_region(g_printer_devno, 1);
        class_destroy(usb_gadget_class);
        mutex_unlock(&usb_printer_gadget.lock_printer_io);
 }