linux-kernel - Re: [PATCH v2 01/10] of/irq: Rework of_irq_count()

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Message-ID: <CAL_JsqLE8aj511oF-gK7Gu5QfmHsQO3+oJ0KFkv0wmuo7i6eiw@mail.gmail.com>
Date:	Sun, 22 Sep 2013 16:19:27 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-mips@...ux-mips.org, Russell King <linux@....linux.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ralf Baechle <ralf@...ux-mips.org>, sparclinux@...r.kernel.org,
	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 01/10] of/irq: Rework of_irq_count()

On Wed, Sep 18, 2013 at 8:24 AM, Thierry Reding
<thierry.reding@...il.com> 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@...dia.com>

Acked-by: Rob Herring <rob.herring@...xeda.com>

> ---
>  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
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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