Commit 632f32e2 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
Browse files

tty: Remove external interface for tty_set_termios() 



tty_set_termios() is an internal helper intended for file scope use.

UART drivers which are capable of driving the RTS pin must
properly handle the tiocmset() method, regardless of termios settings.
A failure to do so is a UART driver bug and should be fixed there.
Do not use this interface to workaround UART driver bugs.

Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: <linux-bluetooth@vger.kernel.org>
Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Acked-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 348f9bb3

drivers/bluetooth/hci_ath.c

+2 −13
Original line number Diff line number Diff line
@@ -51,33 +51,22 @@ struct ath_struct { 


static int ath_wakeup_ar3k(struct tty_struct *tty)

{

	struct ktermios ktermios;

	int status = tty->driver->ops->tiocmget(tty);



	if (status & TIOCM_CTS)

		return status;



	/* Disable Automatic RTSCTS */

	ktermios = tty->termios;

	ktermios.c_cflag &= ~CRTSCTS;

	tty_set_termios(tty, &ktermios);



	/* Clear RTS first */

	status = tty->driver->ops->tiocmget(tty);

	tty->driver->ops->tiocmget(tty);

	tty->driver->ops->tiocmset(tty, 0x00, TIOCM_RTS);

	mdelay(20);



	/* Set RTS, wake up board */

	status = tty->driver->ops->tiocmget(tty);

	tty->driver->ops->tiocmget(tty);

	tty->driver->ops->tiocmset(tty, TIOCM_RTS, 0x00);

	mdelay(20);



	status = tty->driver->ops->tiocmget(tty);



	/* Enable Automatic RTSCTS */

	ktermios.c_cflag |= CRTSCTS;

	status = tty_set_termios(tty, &ktermios);



	return status;

}

drivers/tty/tty_ioctl.c

+1 −2
Original line number Diff line number Diff line
@@ -530,7 +530,7 @@ EXPORT_SYMBOL(tty_termios_hw_change); 
 *	Locking: termios_rwsem

 */



int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios)

static int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios)

{

	struct ktermios old_termios;

	struct tty_ldisc *ld;
@@ -563,7 +563,6 @@ int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios) 
	up_write(&tty->termios_rwsem);

	return 0;

}

EXPORT_SYMBOL_GPL(tty_set_termios);



/**

 *	set_termios		-	set termios values for a tty

include/linux/tty.h

+0 −1
Original line number Diff line number Diff line
@@ -491,7 +491,6 @@ static inline speed_t tty_get_baud_rate(struct tty_struct *tty) 


extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);

extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);

extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt);



extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);

extern void tty_ldisc_deref(struct tty_ldisc *);

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