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Message-ID: <aabae52f-8230-f837-c17a-59d781b5af62@opensource.cirrus.com>
Date:   Fri, 9 Sep 2022 16:40:17 +0100
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Subject: Re: [PATCH 07/10] ASoC: cs42l42: Split I2C identity into separate
 module
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To:     =?UTF-8?Q?Martin_Povi=c5=a1er?= <povik+lin@cutebit.org>,
        James Schulman <james.schulman@cirrus.com>,
        David Rhodes <david.rhodes@cirrus.com>,
        "Lucas Tanure" <tanureal@opensource.cirrus.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
        Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
CC:     Charles Keepax <ckeepax@opensource.cirrus.com>,
        ChiYuan Huang <cy_huang@richtek.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Lukas Bulwahn <lukas.bulwahn@gmail.com>,
        Matt Flax <flatmax@flatmax.com>,
        - <patches@opensource.cirrus.com>, <alsa-devel@alsa-project.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <asahi@lists.linux.dev>
References: <20220909135334.98220-1-povik+lin@cutebit.org>
 <20220909135334.98220-8-povik+lin@cutebit.org>
From:   Richard Fitzgerald <rf@opensource.cirrus.com>
In-Reply-To: <20220909135334.98220-8-povik+lin@cutebit.org>
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Precedence: bulk

On 09/09/2022 14:53, Martin Povišer wrote:
> +static int cs42l42_i2c_probe(struct i2c_client *i2c_client)
> +{
> +	struct device *dev = &i2c_client->dev;
> +	struct cs42l42_private *cs42l42;
> +	struct regmap *regmap;
> +	int ret;
> +
> +	cs42l42 = devm_kzalloc(dev, sizeof(*cs42l42), GFP_KERNEL);
> +	if (!cs42l42)
> +		return -ENOMEM;
> +
> +	regmap = devm_regmap_init_i2c(i2c_client, &cs42l42_regmap);
> +	if (IS_ERR(regmap)) {
> +		ret = PTR_ERR(regmap);
> +		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
> +		return ret;
> +	}
> +
> +	cs42l42->dev = dev;
> +	cs42l42->regmap = regmap;
> +	cs42l42->irq = i2c_client->irq;
> +
> +	ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
> +	if (ret)
> +		return ret;
> +
> +	ret = cs42l42_init(cs42l42);
> +	if (ret)
> +		cs42l42_common_remove(cs42l42);

This introduces a bug that regulator_bulk_disable() is called
twice if there is an error.

cs42l42_init() was supposed to clean up if it returns an error, which
it nearly does, but my original patch is missing the call to free_irq()
in the error paths of cs42l42_init().