/* | |
* Copyright IBM Corp. 2001,2008 | |
* | |
* This file contains the IRQ specific code for hvc_console | |
* | |
*/ | |
#include <linux/interrupt.h> | |
#include "hvc_console.h" | |
static irqreturn_t hvc_handle_interrupt(int irq, void *dev_instance) | |
{ | |
/* if hvc_poll request a repoll, then kick the hvcd thread */ | |
if (hvc_poll(dev_instance)) | |
hvc_kick(); | |
return IRQ_HANDLED; | |
} | |
/* | |
* For IRQ based systems these callbacks can be used | |
*/ | |
int notifier_add_irq(struct hvc_struct *hp, int irq) | |
{ | |
int rc; | |
if (!irq) { | |
hp->irq_requested = 0; | |
return 0; | |
} | |
rc = request_irq(irq, hvc_handle_interrupt, IRQF_DISABLED, | |
"hvc_console", hp); | |
if (!rc) | |
hp->irq_requested = 1; | |
return rc; | |
} | |
void notifier_del_irq(struct hvc_struct *hp, int irq) | |
{ | |
if (!irq) | |
return; | |
free_irq(irq, hp); | |
hp->irq_requested = 0; | |
} |