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Commit 33e745a1 authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Greg Kroah-Hartman
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tty/hvc_console: Add DTR/RTS callback to handle HUPCL control 



Introduce a new callback to explicitly handle the HUPCL termios control flag.
This prepares for a follow-up commit for the hvc_iucv device driver to
improve handling when to drop an established network connection.

The callback naming is based on the recently added tty_port interface to
facilitate a potential refactoring of the hvc_console to use tty_port
functions.

Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e84f54fc

drivers/tty/hvc/hvc_console.c

+10 −1
Original line number Diff line number Diff line
@@ -361,7 +361,12 @@ static int hvc_open(struct tty_struct *tty, struct file * filp) 
		tty->driver_data = NULL;

		tty_port_put(&hp->port);

		printk(KERN_ERR "hvc_open: request_irq failed with rc %d.\n", rc);

	}

	} else

		/* We are ready... raise DTR/RTS */

		if (C_BAUD(tty))

			if (hp->ops->dtr_rts)

				hp->ops->dtr_rts(hp, 1);



	/* Force wakeup of the polling thread */

	hvc_kick();
@@ -393,6 +398,10 @@ static void hvc_close(struct tty_struct *tty, struct file * filp) 
		/* We are done with the tty pointer now. */

		tty_port_tty_set(&hp->port, NULL);



		if (C_HUPCL(tty))

			if (hp->ops->dtr_rts)

				hp->ops->dtr_rts(hp, 0);



		if (hp->ops->notifier_del)

			hp->ops->notifier_del(hp, hp->data);

drivers/tty/hvc/hvc_console.h

+3 −0
Original line number Diff line number Diff line
@@ -75,6 +75,9 @@ struct hv_ops { 
	/* tiocmget/set implementation */

	int (*tiocmget)(struct hvc_struct *hp);

	int (*tiocmset)(struct hvc_struct *hp, unsigned int set, unsigned int clear);



	/* Callbacks to handle tty ports */

	void (*dtr_rts)(struct hvc_struct *hp, int raise);

};



/* Register a vterm and a slot index for use as a console (console_init) */