On Monday 05 June 2006 18:11, Thomas Andrews wrote:
> On Mon, Jun 05, 2006 at 02:51:32PM +0200, Thomas Andrews wrote:
>
> > What can cause "irq x: nobody cared" ? On exit from my IRQ handler, I am
> > checking to make sure that there are no residual/pending unhandled
> > events on exit. Here is part of my handler:
> >
> > irqreturn_t scx200_acb_irq(int irq_no, void *dev_id, struct pt_regs *regs)
> > {
> > struct scx200_acb_iface *iface = dev_id;
> > unsigned long flags;
> > spin_lock_irqsave(lock, flags);
> > if (inb(ACBST)) {
> > // tasklet_schedule(&iface->tasklet);
> > scx200_acb_machine(iface, inb(ACBST));
> > if (iface->state == state_idle) /* Finished */
> > wake_up_interruptible(&iface->acb_queue);
> > } else {
> > /* Should never get here */
> > printk("causeless IRQ!\n");
> > /* Reset the ACB to clear any pending IRQ */
> > outb((inb(ACBCTL2) & 0xfe), ACBCTL2);
> > outb((inb(ACBCTL2) | 0x01), ACBCTL2);
> > }
> > /* Check to see if some event was not handled */
> > if (inb(ACBST) & 0xBC)
> > printk("============== ACBST=%#x ===============\n",inb(ACBST));
> > spin_unlock_irqrestore(lock, flags);
> > return IRQ_RETVAL(0);
> > }
>
> I've found the problem now. The last line is wrong - it should read:
>
> return IRQ_RETVAL(IRQ_HANDLED);
No, either
return IRQ_HANDLED;
or
return IRQ_RETVAL(boolean);
You returned the boolean 0, which is "false".
--
Greetings Michael.
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