linux-kernel - Re: [PATCH] leds: rgb: leds-ktd202x: Fix error code in ktd202x_setup_led

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Message-ID: <aTg1F1MH5qnmUkaG@stanley.mountain>
Date: Tue, 9 Dec 2025 17:41:27 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Kate Hsuan <hpa@...hat.com>, Lee Jones <lee@...nel.org>,
	Pavel Machek <pavel@...nel.org>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Jonathan Cameron <jonathan.cameron@...wei.com>,
	Hans de Goede <hansg@...nel.org>, Andy Shevchenko <andy@...nel.org>,
	linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] leds: rgb: leds-ktd202x: Fix error code in
 ktd202x_setup_led_rgb()

On Tue, Dec 09, 2025 at 04:14:03PM +0200, Andy Shevchenko wrote:
> On Tue, Dec 9, 2025 at 8:56 AM Dan Carpenter <dan.carpenter@...aro.org> wrote:
> >
> > Return -EINVAL if the "reg" value is invalid.  This is unlikely to
> > happen in real life because it comes from the firmware, whether from
> > device tree or ACPI.
> 
> ...
> 
> >                 if (ret != 0 || reg >= chip->num_leds) {
> >                         dev_err(chip->dev, "invalid 'reg' of %pfw\n", child);
> >                         fwnode_handle_put(child);
> > -                       return ret;
> > +                       return ret ?: -EINVAL;
> >                 }
> 
> I think the better fix is to split the original conditional to two.
> 
> And make the message something like
> "can't retrieve 'reg' property of %pfw\n'
> for the case if (ret).
> 

These are never going to show up for users, the messages are only for
developers bringing up a board...

regards,
dan carpenter