There were already checking NULL about channel_t / un_t
before calling dgnc_maxcps_room().
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
*/
static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available)
{
- struct channel_t *ch = NULL;
- struct un_t *un = NULL;
-
- if (!tty)
- return bytes_available;
-
- un = tty->driver_data;
- if (!un || un->magic != DGNC_UNIT_MAGIC)
- return bytes_available;
-
- ch = un->un_ch;
- if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
- return bytes_available;
+ struct un_t *un = tty->driver_data;
+ struct channel_t *ch = un->un_ch;
/*
* If its not the Transparent print device, return