From: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Date: Fri, 22 Aug 2008 01:56:11 +0400
> On Thu, Aug 21, 2008 at 12:10:17AM -0700, David Miller wrote:
> > @@ -96,6 +96,14 @@ static inline void of_node_put(struct device_node *node)
> > {
> > }
> >
> > +/* These routines are here to provide compatibility with how powerpc
> > + * handles IRQ mapping for OF device nodes. We precompute and permanently
> > + * register them in the of_device objects, whereas powerpc computes them
> > + * on request.
> > + */
> > +extern int irq_of_parse_and_map(struct device_node *node, int index);
>
> On powerpc irq_of_parse_and_map() returns unsigned type.
>
> > +#define irq_dispose_mapping(irq) do { } while (0)
>
> I'd rather write it as a static inline function, for type checking,
> plus, I think with this macros gcc may generate warnings about
> defined but unused variables.
Thanks, I'll fix that.
> > +
> > /*
> > * NB: This is here while we transition from using asm/prom.h
> > * to linux/of.h
> > diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c
> > index cc4c235..56e9a71 100644
> > --- a/arch/sparc/kernel/of_device.c
> > +++ b/arch/sparc/kernel/of_device.c
> > @@ -29,6 +29,17 @@ struct of_device *of_find_device_by_node(struct device_node *dp)
> > }
> > EXPORT_SYMBOL(of_find_device_by_node);
> >
> > +int irq_of_parse_and_map(struct device_node *node, int index)
> > +{
> > + struct of_device *op = of_find_device_by_node(node);
> > +
> > + if (!op || index >= op->num_irqs)
> > + return 0xffffffff;
>
> This is valid virq, unfortunately. There is only one invalid virq: 0.
> With this most drivers will fail to identify 'there is no irq' case.
> Does virq0 has special meaning on sparc?
No, I'll fix this up, thanks.
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