On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding
<thierry.reding@xxxxxxxxx> wrote:
> The of_irq_to_resource() helper that is used to implement of_irq_count()
> tries to resolve interrupts and in fact creates a mapping for resolved
> interrupts. That's pretty heavy lifting for something that claims to
> just return the number of interrupts requested by a given device node.
>
> Instead, use the more lightweight of_irq_map_one(), which, despite the
> name, doesn't create an actual mapping. Perhaps a better name would be
> of_irq_translate_one().
>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Acked-by: Rob Herring <rob.herring@xxxxxxxxxxx>
> ---
> drivers/of/irq.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> index 1752988..5f44388 100644
> --- a/drivers/of/irq.c
> +++ b/drivers/of/irq.c
> @@ -368,9 +368,10 @@ EXPORT_SYMBOL_GPL(of_irq_to_resource);
> */
> int of_irq_count(struct device_node *dev)
> {
> + struct of_irq irq;
> int nr = 0;
>
> - while (of_irq_to_resource(dev, nr, NULL))
> + while (of_irq_map_one(dev, nr, &irq) == 0)
> nr++;
>
> return nr;
> --
> 1.8.4
>
>
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