staging: dgap: implement error handling in dgap_tty_register()
authorDaeseok Youn <daeseok.youn@gmail.com>
Mon, 19 May 2014 09:56:34 +0000 (18:56 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 23 May 2014 17:09:06 +0000 (02:09 +0900)
commit9140fcd655541fee5655701df05ab0b06653c24c
treece54c6138efde62c9e638682871bb9fbf922725a
parent02d9b1eb4b21b9309efdf8c8aee023a59d3f76e0
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>
drivers/staging/dgap/dgap.c