Re: [PATCH 04/23] driver core: platform_get_irq*(): return -ENXIO on error

[Olivier Galibert]

On Tue, Mar 21, 2006 at 08:07:09AM +0000, Russell King wrote:
> On Tue, Mar 21, 2006 at 01:13:36AM +0100, Olivier Galibert wrote:
> > On Mon, Mar 20, 2006 at 02:00:38PM -0800, Greg Kroah-Hartman wrote:
> > > platform_get_irq*() cannot return 0 on error as 0 is a valid IRQ on some
> > > platforms, return -ENXIO instead.
> > 
> > 0 is NO_IRQ, and can not be a valid IRQ number, ever.  A
> > platform_get_irq*() returning 0 as a valid irq is buggy.
> > 
> > Check http://lkml.org/lkml/2005/11/21/211
> 
> No.  That's Linus' _opinion_, which is not applicable to systems without
> the obviously broken PCI or ISA busses.  On such systems, IRQ0 has no
> special meaning what so ever.

Do the drivers know?

  OG.
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