From: Fabian Godehardt <fg@emlix.com>
Date: Thu, 1 Sep 2011 12:15:46 +0000 (+0200)
Subject: USB: g_printer: fix bug in unregistration
X-Git-Tag: next-20111004~8^2~50
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8582d86143c690c68cc42f996def466a035bee34;p=karo-tx-linux.git

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 68a0efbc2719..65a8834f274b 100644
--- 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);
 }