linux-kernel - Re: [PATCH] gnss: ubx: Use devm_regulator_get_enable

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Message-ID: <ZJFqWuKgoQfH7PMP@hovoldconsulting.com>
Date:   Tue, 20 Jun 2023 10:59:06 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] gnss: ubx: Use devm_regulator_get_enable_optional()

On Sat, Jun 17, 2023 at 12:01:22PM +0200, Christophe JAILLET wrote:
> Use devm_regulator_get_enable_optional() instead of hand writing it. It
> saves some line of code.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
 
> -	data->v_bckp = devm_regulator_get_optional(&serdev->dev, "v-bckp");
> -	if (IS_ERR(data->v_bckp)) {
> -		ret = PTR_ERR(data->v_bckp);
> -		if (ret == -ENODEV)
> -			data->v_bckp = NULL;
> -		else
> -			goto err_free_gserial;
> -	}
> -
> -	if (data->v_bckp) {
> -		ret = regulator_enable(data->v_bckp);
> -		if (ret)
> -			goto err_free_gserial;
> -	}
> +	ret = devm_regulator_get_enable_optional(&serdev->dev, "v-bckp");
> +	if (ret)
> +		goto err_free_gserial;

Same here, this breaks the driver as -ENODEV is returned when the
optional resource is not present.

Johan