int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long irqflags, const char * devname, void *dev_id) { struct irqaction *action; DEBUG_INT("request_irq: irq=%d, devname = %s\n", irq, devname); if (irq >= ATLASINT_END) return -EINVAL; if (!handler) return -EINVAL; action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL); if(!action) return -ENOMEM; action->handler = handler; action->flags = irqflags; action->mask = 0; action->name = devname; action->dev_id = dev_id; action->next = 0; irq_desc[irq].action = action; enable_atlas_irq(irq); return 0; }
static void end_atlas_irq(unsigned int irq) { if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) enable_atlas_irq(irq); }
static unsigned int startup_atlas_irq(unsigned int irq) { enable_atlas_irq(irq); return 0; /* never anything pending */ }