From 9140fcd655541fee5655701df05ab0b06653c24c Mon Sep 17 00:00:00 2001
From: Daeseok Youn <daeseok.youn@gmail.com>
Date: Mon, 19 May 2014 18:56:34 +0900
Subject: [PATCH] staging: dgap: implement error handling in
 dgap_tty_register()

- alloc_tty_driver() is deprecated so it is changed to
tty_alloc_driver()
- Pointers which are allocated by alloc_tty_driver() and kzalloc()
can be NULL so it need to check NULL for them.
- If one of those is failed, it need to add proper handler for
avoiding memory leak.
- If both of drivers are registered normally, and
then set TRUE to dgap_major_serial{print}_registered. If one
of drivers is failed to register, leave a default value as
FALSE.

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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