linux-kernel - Re: [PATCH v11 01/19] arm: fiq: Add callbacks to manage FIQ routings

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Message-ID: <20140902185127.GV30401@n2100.arm.linux.org.uk>
Date:	Tue, 2 Sep 2014 19:51:27 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Daniel Thompson <daniel.thompson@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kgdb-bugreport@...ts.sourceforge.net, patches@...aro.org,
	linaro-kernel@...ts.linaro.org,
	John Stultz <john.stultz@...aro.org>,
	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Colin Cross <ccross@...roid.com>, kernel-team@...roid.com,
	Rob Herring <robherring2@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Ben Dooks <ben.dooks@...ethink.co.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Dave Martin <Dave.Martin@....com>,
	Fabio Estevam <festevam@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Nicolas Pitre <nico@...aro.org>
Subject: Re: [PATCH v11 01/19] arm: fiq: Add callbacks to manage FIQ
	routings

On Tue, Sep 02, 2014 at 02:00:35PM +0100, Daniel Thompson wrote:
>  void enable_fiq(int fiq)
>  {
> +	struct fiq_data *data = lookup_fiq_data(fiq);
> +
> +	if (data) {
> +		if (data->fiq_chip->fiq_enable)
> +			data->fiq_chip->fiq_enable(data->irq_data);
> +		enable_irq(fiq);

Why do we call the FIQ chip's enable and enable_irq() as well?

>  void disable_fiq(int fiq)
>  {
> +	struct fiq_data *data = lookup_fiq_data(fiq);
> +
> +	if (data) {
> +		if (data->fiq_chip->fiq_disable)
> +			data->fiq_chip->fiq_disable(data->irq_data);
> +		disable_irq(fiq);

Same question here.

> +bool has_fiq(int fiq)
> +{
> +	struct fiq_data *data = lookup_fiq_data(fiq);
> +
> +	if (data)
> +		return true;
> +
> +	if (fiq_start == -1)
> +		return false;
> +
> +	return fiq >= fiq_start;

Are you sure this is correct... it looks wrong to me.

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