linux-kernel - RE: [PATCH V2 1/7] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs

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Message-ID: <F934AE11CE617240AE4A874A49F629E4832564@DBDE04.ent.ti.com>
Date:	Thu, 31 Oct 2013 10:50:04 +0000
From:	"R, Sricharan" <r.sricharan@...com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"tony@...mide.com" <tony@...mide.com>,
	"Nayak, Rajendra" <rnayak@...com>,
	"marc.zyngier@....com" <marc.zyngier@....com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"robherring2@...il.com" <robherring2@...il.com>,
	"Shilimkar, Santosh" <santosh.shilimkar@...com>,
	Rob Herring <rob.herring@...xeda.com>
Subject: RE: [PATCH V2 1/7] DRIVERS: IRQCHIP: IRQ-GIC: Add support for
 routable irqs

Hi Thomas,
  Sorry for top posting. My mailer is not allowing me any formatting.

  I agree with both of your comments below.
  I will post V3 for this.

Regards,
 Sricharan

________________________________________
From: Thomas Gleixner [tglx@...utronix.de]
Sent: Wednesday, October 30, 2013 8:45 PM
To: R, Sricharan
Cc: linux-kernel@...r.kernel.org; devicetree@...r.kernel.org; linux-doc@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-omap@...r.kernel.org; linus.walleij@...aro.org; linux@....linux.org.uk; tony@...mide.com; Nayak, Rajendra; marc.zyngier@....com; grant.likely@...aro.org; mark.rutland@....com; robherring2@...il.com; Shilimkar, Santosh; Rob Herring
Subject: Re: [PATCH V2 1/7] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs

On Wed, 30 Oct 2013, Sricharan R wrote:
> @@ -700,11 +709,22 @@ static int gic_irq_domain_xlate(struct irq_domain *d,
>       *out_hwirq = intspec[1] + 16;
>
>       /* For SPIs, we need to add 16 more to get the GIC irq ID number */
> -     if (!intspec[0])
> +     if (!intspec[0]) {
>               *out_hwirq += 16;

Minor nit. This should be in the default implementation. The crossbar
implementation will fill out_hwirq in its own way and is not
interested in the +16 operation at all.

> +             ret = gic_routable_irq_domain_ops->xlate(d, controller,
> +                                                      intspec,
> +                                                      intsize,
> +                                                      out_hwirq,
> +                                                      out_type);
> +

> +             gic->domain = irq_domain_add_legacy(node, gic_irqs, irq_base,
> +                                     hwirq_base, &gic_irq_domain_ops, gic);
> +     } else {
> +             if (WARN_ON(!gic_routable_irq_domain_ops))
> +                     return;

This warning is pointless, because you have default ops now.

> +
> +             gic->domain = irq_domain_add_linear(node, nr_routable_irqs,
> +                                                 &gic_irq_domain_ops,
> +                                                 gic);
>       }

Thanks,

        tglx--
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