Re: how I know if a interrupt is ioapic_edge_type or ioapic_level_type? [Was Re: [Fwd: Re: [Linux-usb-users] Fwd: Re:2.6.17-rc6-mm2 - USB issues]]

[Randy.Dunlap]

On Thu, 22 Jun 2006 12:56:25 +0100 Sergio Monteiro Basto wrote:

> On Wed, 2006-06-21 at 21:08 -0700, Randy.Dunlap wrote:
> > 
> > If you have a specific issue/problem, it would probably be
> > better just to focus on that. 
> 
> on linux-2.6.17/drivers/pci/quirks.c	
> 
>   * we must mask the PCI_INTERRUPT_LINE value versus 0xf to get
>   * interrupts delivered properly.
>   */
> 
>  static void quirk_via_irq(struct pci_dev *dev)
>  {
>  	u8 irq, new_irq;
> 
> I want here put something like:  if ( dev->irq != XT-PIC) return and don't quirk this dev.
>  	else 

I don't think the interrupt device mode is known by this code (AFAICT
with a quick look).  The function is only called for certain VIA chipsets.

Do you want the quirk for any particular hardware device?
You might be able to look at the function's <dev> parameter
to decide on using the quirk or not.


> 	new_irq = dev->irq & 0xf;
>  	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);


---
~Randy
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