linux-kernel - [PATCH 6.0 407/862] ASoC: stm: Fix PM disable depth imbalance in stm32_i2s

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Date:   Wed, 19 Oct 2022 10:28:14 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhang Qilong <zhangqilong3@...wei.com>,
        Olivier Moysan <olivier.moysan@...s.st.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.0 407/862] ASoC: stm: Fix PM disable depth imbalance in stm32_i2s_probe

From: Zhang Qilong <zhangqilong3@...wei.com>

[ Upstream commit 93618e5e05a3ce4aa6750268c5025bdb4cb7dc6e ]

The pm_runtime_enable will increase power disable depth. Thus
a pairing decrement is needed on the error handling path to
keep it balanced according to context. We fix it by moving
pm_runtime_enable to the endding of stm32_i2s_probe.

Fixes:32a956a1fadf ("ASoC: stm32: i2s: add pm_runtime support")

Signed-off-by: Zhang Qilong <zhangqilong3@...wei.com>
Reviewed-by: Olivier Moysan <olivier.moysan@...s.st.com>
Link: https://lore.kernel.org/r/20220927142640.64647-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/stm/stm32_i2s.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 6aafe793eec4..ce7f6942308f 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -1136,8 +1136,6 @@ static int stm32_i2s_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(i2s->regmap),
 				     "Regmap init error\n");
 
-	pm_runtime_enable(&pdev->dev);
-
 	ret = snd_dmaengine_pcm_register(&pdev->dev, &stm32_i2s_pcm_config, 0);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret, "PCM DMA register error\n");
@@ -1180,6 +1178,8 @@ static int stm32_i2s_probe(struct platform_device *pdev)
 			FIELD_GET(I2S_VERR_MIN_MASK, val));
 	}
 
+	pm_runtime_enable(&pdev->dev);
+
 	return ret;
 
 error:
-- 
2.35.1