linux-kernel - Re: [PATCH 3/3] ASoC: amd: fix for variable set but not used warning

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Date:   Mon, 11 Jul 2022 10:59:33 +0800
From:   Zhu Ning <zhuning0077@...il.com>
To:     vijendar.mukunda@....com
Cc:     Basavaraj.Hiregoudar@....com, Sunil-kumar.Dommati@....com,
        alsa-devel@...a-project.org, amadeuszx.slawinski@...ux.intel.com,
        broonie@...nel.org, christophe.jaillet@...adoo.fr,
        lgirdwood@...il.com, linux-kernel@...r.kernel.org, lkp@...el.com,
        tiwai@...e.com, zhuning@...rest-semi.com
Subject: Re: [PATCH 3/3] ASoC: amd: fix for variable set but not used warning

This code is ok. The machine driver should still function well without gpio.

if (IS_ERR(gpio_pa)) {
        gpiod_put(gpio_pa);
        put_device(codec_dev);
        return dev_err_probe(card->dev, PTR_ERR(gpio_pa),
                                            "could not get pa-enable GPIO\n");

}

You donnot need to handle null gpio_pa gpio.

if (!(IS_ERR_OR_NULL(gpio_pa))) 
	gpiod_set_value_cansleep(gpio_pa, true);