linux-kernel - Re: [PATCH 4/4] irqchip: atmel-aic: Remove duplicate bit operation

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Date:	Wed, 13 Jan 2016 09:18:17 +0100
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Milo Kim <milo.kim@...com>
Cc:	<tglx@...utronix.de>, Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	Nicholas Ferre <nicolas.ferre@...el.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] irqchip: atmel-aic: Remove duplicate bit operation

On Wed, 13 Jan 2016 16:19:52 +0900
Milo Kim <milo.kim@...com> wrote:

> AIC5 priority value is updated twice -
> in aic_common_set_priority() and when updating AT91_AIC5_SMR.
> Variable, 'smr' has updated priority value (intspec[2]) in the first step,
> so no need to update it again in the second step.
> 
> Signed-off-by: Milo Kim <milo.kim@...com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: Marc Zyngier <marc.zyngier@....com>
> Cc: Boris Brezillon <boris.brezillon@...e-electrons.com>
> Cc: Ludovic Desroches <ludovic.desroches@...el.com>
> Cc: Nicholas Ferre <nicolas.ferre@...el.com>
> Cc: linux-kernel@...r.kernel.org

Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>

Thanks,

Boris

> ---
>  drivers/irqchip/irq-atmel-aic5.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/irqchip/irq-atmel-aic5.c b/drivers/irqchip/irq-atmel-aic5.c
> index f36f426..4f0d068 100644
> --- a/drivers/irqchip/irq-atmel-aic5.c
> +++ b/drivers/irqchip/irq-atmel-aic5.c
> @@ -273,7 +273,7 @@ static int aic5_irq_domain_xlate(struct irq_domain *d,
>  	irq_reg_writel(bgc, *out_hwirq, AT91_AIC5_SSR);
>  	smr = irq_reg_readl(bgc, AT91_AIC5_SMR);
>  	aic_common_set_priority(intspec[2], &smr);
> -	irq_reg_writel(bgc, intspec[2] | smr, AT91_AIC5_SMR);
> +	irq_reg_writel(bgc, smr, AT91_AIC5_SMR);
>  	irq_gc_unlock(bgc);
>  
>  	return ret;



-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com