/* * 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; }