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Commit 04ec1c8c authored by Al Viro's avatar Al Viro
Browse files

dgnc: TIOCM... won't reach ->ioctl() 



bury the dead code (and ->tiocmget()/->tiocmset() are there, so I really
wonder why have they kept the stuff that became unreachable with the
introduction of those...)

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent e67504c5

drivers/staging/dgnc/dgnc_tty.c

+0 −114
Original line number Diff line number Diff line
@@ -60,10 +60,6 @@ static void dgnc_tty_unthrottle(struct tty_struct *tty); 
static void dgnc_tty_flush_chars(struct tty_struct *tty);

static void dgnc_tty_flush_buffer(struct tty_struct *tty);

static void dgnc_tty_hangup(struct tty_struct *tty);

static int dgnc_set_modem_info(struct channel_t *ch, unsigned int command,

			       unsigned int __user *value);

static int dgnc_get_modem_info(struct channel_t *ch,

			       unsigned int __user *value);

static int dgnc_tty_tiocmget(struct tty_struct *tty);

static int dgnc_tty_tiocmset(struct tty_struct *tty, unsigned int set,

			     unsigned int clear);
@@ -1701,106 +1697,6 @@ static void dgnc_tty_send_xchar(struct tty_struct *tty, char c) 
	spin_unlock_irqrestore(&ch->ch_lock, flags);

}



/* Return modem signals to ld. */

static inline int dgnc_get_mstat(struct channel_t *ch)

{

	unsigned char mstat;

	unsigned long flags;

	int rc;



	if (!ch)

		return -ENXIO;



	spin_lock_irqsave(&ch->ch_lock, flags);



	mstat = ch->ch_mostat | ch->ch_mistat;



	spin_unlock_irqrestore(&ch->ch_lock, flags);



	rc = 0;



	if (mstat & UART_MCR_DTR)

		rc |= TIOCM_DTR;

	if (mstat & UART_MCR_RTS)

		rc |= TIOCM_RTS;

	if (mstat & UART_MSR_CTS)

		rc |= TIOCM_CTS;

	if (mstat & UART_MSR_DSR)

		rc |= TIOCM_DSR;

	if (mstat & UART_MSR_RI)

		rc |= TIOCM_RI;

	if (mstat & UART_MSR_DCD)

		rc |= TIOCM_CD;



	return rc;

}



/* Return modem signals to ld. */

static int dgnc_get_modem_info(struct channel_t *ch,

			       unsigned int  __user *value)

{

	return put_user(dgnc_get_mstat(ch), value);

}



/* Set modem signals, called by ld. */

static int dgnc_set_modem_info(struct channel_t *ch,

			       unsigned int command,

			       unsigned int __user *value)

{

	int rc;

	unsigned int arg = 0;

	unsigned long flags;



	rc = get_user(arg, value);

	if (rc)

		return rc;



	switch (command) {

	case TIOCMBIS:

		if (arg & TIOCM_RTS)

			ch->ch_mostat |= UART_MCR_RTS;



		if (arg & TIOCM_DTR)

			ch->ch_mostat |= UART_MCR_DTR;



		break;



	case TIOCMBIC:

		if (arg & TIOCM_RTS)

			ch->ch_mostat &= ~(UART_MCR_RTS);



		if (arg & TIOCM_DTR)

			ch->ch_mostat &= ~(UART_MCR_DTR);



		break;



	case TIOCMSET:



		if (arg & TIOCM_RTS)

			ch->ch_mostat |= UART_MCR_RTS;

		else

			ch->ch_mostat &= ~(UART_MCR_RTS);



		if (arg & TIOCM_DTR)

			ch->ch_mostat |= UART_MCR_DTR;

		else

			ch->ch_mostat &= ~(UART_MCR_DTR);



		break;



	default:

		return -EINVAL;

	}



	spin_lock_irqsave(&ch->ch_lock, flags);



	ch->ch_bd->bd_ops->assert_modem_signals(ch);



	spin_unlock_irqrestore(&ch->ch_lock, flags);



	return 0;

}



/* Ioctl to get the information for ditty. */

static int dgnc_tty_digigeta(struct tty_struct *tty,

			     struct digi_t __user *retinfo)
@@ -2282,16 +2178,6 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, 


		return 0;



	case TIOCMGET:

		spin_unlock_irqrestore(&ch->ch_lock, flags);

		return dgnc_get_modem_info(ch, uarg);



	case TIOCMBIS:

	case TIOCMBIC:

	case TIOCMSET:

		spin_unlock_irqrestore(&ch->ch_lock, flags);

		return dgnc_set_modem_info(ch, cmd, uarg);



		/* Here are any additional ioctl's that we want to implement */



	case TCFLSH: