linux-kernel - Re: [PATCH 1/1] irqchip: imx-gpcv2: Simplify the implemenation

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Date:	Wed, 26 Aug 2015 18:00:24 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Shenwei Wang <shenwei.wang@...escale.com>
cc:	shawn.guo@...aro.org, jason@...edaemon.net, sudeep.holla@....com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	b20788@...escale.com
Subject: Re: [PATCH 1/1] irqchip: imx-gpcv2: Simplify the implemenation

On Wed, 26 Aug 2015, Shenwei Wang wrote:
>  u32 imx_gpcv2_get_wakeup_source(u32 **sources)
>  {
> -	if (!imx_gpcv2_instance)
> +	struct gpcv2_irqchip_data *cd;
> +	void __iomem *reg;
> +	int i;
> +
> +	cd = imx_gpcv2_instance;
> +	if (!cd)
>  		return 0;
>  
> +	for (i = 0; i < IMR_NUM; i++) {
> +		reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
> +		cd->wakeup_sources[i] = readl_relaxed(reg);
> +	}
> +
>  	if (sources)
> -		*sources = imx_gpcv2_instance->wakeup_sources;
> +		*sources = cd->wakeup_sources;
>  
>  	return IMR_NUM;

You do not need the intermediate storage at all.

u32 imx_gpcv2_get_wakeup_source(u32 *sources)
{
	if (sources) {
		for (i = 0; i < IMR_NUM; i++) {
			reg = cd->gpc_base + cd->cpu2wakeup + i * 4;
			sources[i] = readl_relaxed(reg);
		}
	}
	....

Hmm?
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