linux-kernel - Re: [PATCH v4 23/24] platform: Modify platform_get_irq

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Date: Sat, 6 Jan 2024 16:55:57 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Mark Hasemeyer <markhas@...omium.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Raul Rangel <rrangel@...omium.org>,
	Tzung-Bi Shih <tzungbi@...nel.org>, David Gow <davidgow@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mark Brown <broonie@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Takashi Iwai <tiwai@...e.de>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH v4 23/24] platform: Modify platform_get_irq_optional() to
 use resource

On Tue, Jan 02, 2024 at 02:07:47PM -0700, Mark Hasemeyer wrote:
> Unify handling of ACPI, GPIO, devictree, and platform resource
> interrupts in platform_get_irq_optional(). Each of these subsystems
> provide their own APIs which provide IRQ information as a struct
> resource. This simplifies the logic of the function and allows callers
> to get more information about the IRQ by looking at the resource flags.
> For example, whether or not an IRQ is wake capable.

...

> +	ret = fwnode_irq_get_resource(fwnode, num, r);

I still prefer this not to return positive value. Since you _require_ @r to be
not NULL, i.e. valid, the returning positive value makes no sense.

> +	ret = ret < 0 ? ret : 0;
> +	if (!ret || ret == -EPROBE_DEFER)
> +		goto out;

...

> +	struct resource *platform_res = platform_get_resource(dev, IORESOURCE_IRQ, num);

Same comment, please split definition and assignment.

-- 
With Best Regards,
Andy Shevchenko