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Commit fc362e2e authored by Hendrik Brueckner's avatar Hendrik Brueckner Committed by Benjamin Herrenschmidt
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hvc_console: Add a hangup notifier for backends 



I have added a hangup notifier that can be used by hvc console
backends to handle a tty hangup. The default irq hangup notifier
calls the notifier_del_irq() for compatibility.

Acked-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarHendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent a02efb90

drivers/char/hvc_console.c

+2 −2
Original line number Diff line number Diff line
@@ -418,8 +418,8 @@ static void hvc_hangup(struct tty_struct *tty) 


	spin_unlock_irqrestore(&hp->lock, flags);



	if (hp->ops->notifier_del)

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

	if (hp->ops->notifier_hangup)

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



	while(temp_open_count) {

		--temp_open_count;

drivers/char/hvc_console.h

+3 −1
Original line number Diff line number Diff line
@@ -65,9 +65,10 @@ struct hv_ops { 
	int (*get_chars)(uint32_t vtermno, char *buf, int count);

	int (*put_chars)(uint32_t vtermno, const char *buf, int count);



	/* Callbacks for notification. Called in open and close */

	/* Callbacks for notification. Called in open, close and hangup */

	int (*notifier_add)(struct hvc_struct *hp, int irq);

	void (*notifier_del)(struct hvc_struct *hp, int irq);

	void (*notifier_hangup)(struct hvc_struct *hp, int irq);

};



/* Register a vterm and a slot index for use as a console (console_init) */
@@ -86,6 +87,7 @@ void hvc_kick(void); 
/* default notifier for irq based notification */

extern int notifier_add_irq(struct hvc_struct *hp, int data);

extern void notifier_del_irq(struct hvc_struct *hp, int data);

extern void notifier_hangup_irq(struct hvc_struct *hp, int data);





#if defined(CONFIG_XMON) && defined(CONFIG_SMP)

drivers/char/hvc_irq.c

+5 −0
Original line number Diff line number Diff line
@@ -42,3 +42,8 @@ void notifier_del_irq(struct hvc_struct *hp, int irq) 
	free_irq(irq, hp);

	hp->irq_requested = 0;

}



void notifier_hangup_irq(struct hvc_struct *hp, int irq)

{

	notifier_del_irq(hp, irq);

}

drivers/char/hvc_iseries.c

+1 −0
Original line number Diff line number Diff line
@@ -202,6 +202,7 @@ static struct hv_ops hvc_get_put_ops = { 
	.put_chars = put_chars,

	.notifier_add = notifier_add_irq,

	.notifier_del = notifier_del_irq,

	.notifier_hangup = notifier_hangup_irq,

};



static int __devinit hvc_vio_probe(struct vio_dev *vdev,

drivers/char/hvc_vio.c

+1 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ static struct hv_ops hvc_get_put_ops = { 
	.put_chars = hvc_put_chars,

	.notifier_add = notifier_add_irq,

	.notifier_del = notifier_del_irq,

	.notifier_hangup = notifier_hangup_irq,

};



static int __devinit hvc_vio_probe(struct vio_dev *vdev,