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);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
