linux-kernel - [PATCH AUTOSEL 4.19 185/206] ASoC: img-i2s-out: Fix runtime PM imbalance on error

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Message-Id: <20200918020802.2065198-185-sashal@kernel.org>
Date:   Thu, 17 Sep 2020 22:07:41 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dinghao Liu <dinghao.liu@....edu.cn>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 4.19 185/206] ASoC: img-i2s-out: Fix runtime PM imbalance on error

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit 65bd91dd6957390c42a0491b9622cf31a2cdb140 ]

pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Link: https://lore.kernel.org/r/20200529012230.5863-1-dinghao.liu@zju.edu.cn
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/img/img-i2s-out.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/img/img-i2s-out.c b/sound/soc/img/img-i2s-out.c
index fc2d1dac63339..798ab579564cb 100644
--- a/sound/soc/img/img-i2s-out.c
+++ b/sound/soc/img/img-i2s-out.c
@@ -350,8 +350,10 @@ static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	chan_control_mask = IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
 
 	ret = pm_runtime_get_sync(i2s->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(i2s->dev);
 		return ret;
+	}
 
 	img_i2s_out_disable(i2s);
 
@@ -491,8 +493,10 @@ static int img_i2s_out_probe(struct platform_device *pdev)
 			goto err_pm_disable;
 	}
 	ret = pm_runtime_get_sync(&pdev->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(&pdev->dev);
 		goto err_suspend;
+	}
 
 	reg = IMG_I2S_OUT_CTL_FRM_SIZE_MASK;
 	img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
-- 
2.25.1