linux-kernel - Re: [PATCH v2 04/11] gpiolib: Clear the gpio_device's fwnode initialized flag before adding

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Message-ID: <Y9OY6pMwYtab1Avd@smile.fi.intel.com>
Date:   Fri, 27 Jan 2023 11:27:06 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Len Brown <lenb@...nel.org>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Tony Lindgren <tony@...mide.com>,
        Linux Kernel Functional Testing <lkft@...aro.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
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        Alexander Stein <alexander.stein@...tq-group.com>,
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        John Stultz <jstultz@...gle.com>,
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        Guenter Roeck <linux@...ck-us.net>,
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        Maxim Kochetkov <fido_max@...ox.ru>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
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        Martin Kepplinger <martin.kepplinger@...i.sm>,
        Jean-Philippe Brucker <jpb@...nel.org>,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 04/11] gpiolib: Clear the gpio_device's fwnode
 initialized flag before adding

On Thu, Jan 26, 2023 at 04:11:31PM -0800, Saravana Kannan wrote:
> Registering an irqdomain sets the flag for the fwnode. But having the
> flag set when a device is added is interpreted by fw_devlink to mean the
> device has already been initialized and will never probe. This prevents
> fw_devlink from creating device links with the gpio_device as a
> supplier. So, clear the flag before adding the device.

...

> +	/*
> +	 * If fwnode doesn't belong to another device, it's safe to clear its
> +	 * initialized flag.
> +	 */
> +	if (!gdev->dev.fwnode->dev)
> +		fwnode_dev_initialized(gdev->dev.fwnode, false);

Do not dereference fwnode in struct device. Use dev_fwnode() for that.

	struct fwnode_handle *fwnode = dev_fwnode(&gdev->dev);

	if (!fwnode->dev)
		fwnode_dev_initialized(fwnode, false);

+ Blank line.

>  	ret = gcdev_register(gdev, gpio_devt);
>  	if (ret)
>  		return ret;

-- 
With Best Regards,
Andy Shevchenko