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From:   Johan Hovold <johan+linaro@kernel.org>
To:     Mark Brown <broonie@kernel.org>
Cc:     Liam Girdwood <lgirdwood@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
        Johan Hovold <johan+linaro@kernel.org>, stable@vger.kernel.org
Subject: [PATCH 4/7] ASoC: codecs: wcd938x: fix regulator leaks on probe errors
Date:   Tue,  3 Oct 2023 17:55:55 +0200
Message-ID: <20231003155558.27079-5-johan+linaro@kernel.org>
In-Reply-To: <20231003155558.27079-1-johan+linaro@kernel.org>
References: <20231003155558.27079-1-johan+linaro@kernel.org>
MIME-Version: 1.0
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Make sure to disable and free the regulators on probe errors and on
driver unbind.

Fixes: 16572522aece ("ASoC: codecs: wcd938x-sdw: add SoundWire driver")
Cc: stable@vger.kernel.org      # 5.14
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 sound/soc/codecs/wcd938x.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index 7e0b07eeed77..679c627f7eaa 100644
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -3325,8 +3325,10 @@ static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device
 		return dev_err_probe(dev, ret, "Failed to get supplies\n");
 
 	ret = regulator_bulk_enable(WCD938X_MAX_SUPPLY, wcd938x->supplies);
-	if (ret)
+	if (ret) {
+		regulator_bulk_free(WCD938X_MAX_SUPPLY, wcd938x->supplies);
 		return dev_err_probe(dev, ret, "Failed to enable supplies\n");
+	}
 
 	wcd938x_dt_parse_micbias_info(dev, wcd938x);
 
@@ -3592,13 +3594,13 @@ static int wcd938x_probe(struct platform_device *pdev)
 
 	ret = wcd938x_add_slave_components(wcd938x, dev, &match);
 	if (ret)
-		return ret;
+		goto err_disable_regulators;
 
 	wcd938x_reset(wcd938x);
 
 	ret = component_master_add_with_match(dev, &wcd938x_comp_ops, match);
 	if (ret)
-		return ret;
+		goto err_disable_regulators;
 
 	pm_runtime_set_autosuspend_delay(dev, 1000);
 	pm_runtime_use_autosuspend(dev);
@@ -3608,11 +3610,21 @@ static int wcd938x_probe(struct platform_device *pdev)
 	pm_runtime_idle(dev);
 
 	return 0;
+
+err_disable_regulators:
+	regulator_bulk_disable(WCD938X_MAX_SUPPLY, wcd938x->supplies);
+	regulator_bulk_free(WCD938X_MAX_SUPPLY, wcd938x->supplies);
+
+	return ret;
 }
 
 static void wcd938x_remove(struct platform_device *pdev)
 {
+	struct wcd938x_priv *wcd938x = dev_get_drvdata(&pdev->dev);
+
 	component_master_del(&pdev->dev, &wcd938x_comp_ops);
+	regulator_bulk_disable(WCD938X_MAX_SUPPLY, wcd938x->supplies);
+	regulator_bulk_free(WCD938X_MAX_SUPPLY, wcd938x->supplies);
 }
 
 #if defined(CONFIG_OF)
-- 
2.41.0