linux-kernel - [PATCH] ASoC: mmp-sspa: Fix the error handling in probe()

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Date:   Wed, 20 May 2020 10:35:16 +0200
From:   Lubomir Rintel <lkundrak@...sk>
To:     Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Lubomir Rintel <lkundrak@...sk>
Subject: [PATCH] ASoC: mmp-sspa: Fix the error handling in probe()

If we fail after pm_runtime_enable(), we fail to undo it. Same with
clk_prepare_enable(). Let's order them after all things that can fail.

Fixes: 7d98cc648253 ("ASoC: mmp-sspa: Add support for the runtime power management")
Signed-off-by: Lubomir Rintel <lkundrak@...sk>
---
 sound/soc/pxa/mmp-sspa.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/sound/soc/pxa/mmp-sspa.c b/sound/soc/pxa/mmp-sspa.c
index 60bf6fe05315..77a6d2998570 100644
--- a/sound/soc/pxa/mmp-sspa.c
+++ b/sound/soc/pxa/mmp-sspa.c
@@ -467,6 +467,7 @@ static const struct snd_soc_component_driver mmp_sspa_component = {
 static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 {
 	struct sspa_priv *sspa;
+	int ret;
 
 	sspa = devm_kzalloc(&pdev->dev,
 				sizeof(struct sspa_priv), GFP_KERNEL);
@@ -518,8 +519,6 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 			return PTR_ERR(sspa->sysclk);
 		}
 	}
-	pm_runtime_enable(&pdev->dev);
-	clk_prepare_enable(sspa->audio_clk);
 	platform_set_drvdata(pdev, sspa);
 
 	sspa->playback_dma_data.maxburst = 4;
@@ -529,16 +528,21 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 	sspa->playback_dma_data.addr = 0x80 + SSPA_D;
 
 	if (pdev->dev.of_node) {
-		int ret;
-
 		ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
 						      &mmp_pcm_config, 0);
 		if (ret)
 			return ret;
 	}
 
-	return devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
-					       &mmp_sspa_dai, 1);
+	ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
+					      &mmp_sspa_dai, 1);
+	if (ret)
+		return ret;
+
+	pm_runtime_enable(&pdev->dev);
+	clk_prepare_enable(sspa->audio_clk);
+
+	return 0;
 }
 
 static int asoc_mmp_sspa_remove(struct platform_device *pdev)
-- 
2.26.2