linux-kernel - Re: [PATCH v3 04/17] usb: typec: Add device managed typec_mux

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Message-ID: <ZsRsjPwNQYWWGIXg@smile.fi.intel.com>
Date: Tue, 20 Aug 2024 13:14:36 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Stephen Boyd <swboyd@...omium.org>
Cc: chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev, devicetree@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>,
	Pin-yen Lin <treapking@...omium.org>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Benson Leung <bleung@...omium.org>,
	Conor Dooley <conor+dt@...nel.org>, Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...il.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	dri-devel@...ts.freedesktop.org,
	Guenter Roeck <groeck@...omium.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Jonas Karlman <jonas@...boo.se>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Lee Jones <lee@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Prashant Malani <pmalani@...omium.org>,
	Robert Foss <rfoss@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Tzung-Bi Shih <tzungbi@...nel.org>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Daniel Scally <djrscally@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Ivan Orlov <ivan.orlov0322@...il.com>, linux-acpi@...r.kernel.org,
	linux-usb@...r.kernel.org,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v3 04/17] usb: typec: Add device managed
 typec_mux_register()

On Mon, Aug 19, 2024 at 03:38:18PM -0700, Stephen Boyd wrote:
> Simplify driver error paths by adding devm_typec_mux_register() which
> will unregister the typec mux when the parent device is unbound.

> Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: <linux-usb@...r.kernel.org>
> Cc: Pin-yen Lin <treapking@...omium.org>

As per previous comment, move these after --- line
(hint: You may have it in your Git commit with --- line,
 it will be removed on the receiver side by `git am`)

...

> +/** devm_typec_mux_register - resource managed typec_mux_register()

Wrong comment style.

> + * @parent: Parent device
> + * @desc: Multiplexer description
> + *
> + * Register a typec mux and automatically unregister the typec mux
> + * when @parent is unbound from its driver.
> + *
> + * The arguments to this function are identical to typec_mux_register().
> + *
> + * Return: the typec_mux_dev structure on success, else an error pointer.
> + */
> +struct typec_mux_dev *
> +devm_typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
> +{
> +	struct typec_mux_dev **ptr, *mux_dev;
> +
> +	ptr = devres_alloc(devm_typec_mux_unregister, sizeof(*ptr), GFP_KERNEL);
> +	if (!ptr)
> +		return ERR_PTR(-ENOMEM);
> +
> +	mux_dev = typec_mux_register(parent ,desc);
> +	if (!IS_ERR(mux_dev)) {
> +		*ptr = mux_dev;
> +		devres_add(parent, ptr);
> +	} else {
> +		devres_free(ptr);
> +	}

What does prevent you from using devm_add_action_or_reset()?

> +	return mux_dev;
> +}

-- 
With Best Regards,
Andy Shevchenko