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staging: dgap: removes redundant null check and change paramter for dgap_tty_digisetcustombaud() 

Null checks in dgap_tty_digisetcustombaud() are already done by
dgap_tty_ioctl() and change "tty" as a paramter of this function
to "ch", "bd and "un".

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daeseok Youn 2014-07-11 19:24:34 +09:00 committed by Greg Kroah-Hartman
parent 501bcd4f9b
commit db6fc2df9c
1 changed files with 5 additions and 24 deletions
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29
drivers/staging/dgap/dgap.c
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@ -106,8 +106,8 @@ static int dgap_set_modem_info(struct channel_t *ch, struct board_t *bd, struct
unsigned int command, unsigned int __user *value);
static int dgap_get_modem_info(struct channel_t *ch,
unsigned int __user *value);
static int dgap_tty_digisetcustombaud(struct tty_struct *tty,
int __user *new_info);
static int dgap_tty_digisetcustombaud(struct channel_t *ch, struct board_t *bd,
struct un_t *un, int __user *new_info);
static int dgap_tty_digigetcustombaud(struct channel_t *ch, struct un_t *un,
int __user *retinfo);
static int dgap_tty_tiocmget(struct tty_struct *tty);
@ -3344,32 +3344,13 @@ static int dgap_tty_digigetcustombaud(struct channel_t *ch, struct un_t *un,
*
* Ioctl to set the custom baud rate setting
*/
static int dgap_tty_digisetcustombaud(struct tty_struct *tty,
int __user *new_info)
static int dgap_tty_digisetcustombaud(struct channel_t *ch, struct board_t *bd,
struct un_t *un, int __user *new_info)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
uint new_rate;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return -EFAULT;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EFAULT;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EFAULT;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return -EFAULT;
if (copy_from_user(&new_rate, new_info, sizeof(unsigned int)))
return -EFAULT;
@ -4040,7 +4021,7 @@ static int dgap_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
case DIGI_SETCUSTOMBAUD:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digisetcustombaud(tty, uarg);
return dgap_tty_digisetcustombaud(ch, bd, un, uarg);
case DIGI_RESET_PORT:
dgap_firmware_reset_port(ch);