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ASoC: fsl: fsl_asrc: Check for clk_prepare_enable() error

PATCH In review Fabio Estevam 2 participants 2 messages Jun 20, 2015

Subsystems (3)
Sound ASoC Freescale SoC sound drivers
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Fabio Estevam

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#0 lore raw

PATCH 1/1 ASoC: fsl: fsl_asrc: Check for clk_prepare_enable() error

From: Fabio Estevam <[email protected]>

clk_prepare_enable() may fail, so we should better check its return value and propagate it in the case of error.

Signed-off-by Fabio Estevam <[email protected]>
---
 sound/soc/fsl/fsl_asrc.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)
sound/soc/fsl/fsl_asrc.c +11 -3
index c068494..37dde26 100644
@@ -931,14 +931,22 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 static int fsl_asrc_runtime_resume(struct device *dev)
 {
 	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
-	int i;
+	int i, ret;
 
-	clk_prepare_enable(asrc_priv->mem_clk);
-	clk_prepare_enable(asrc_priv->ipg_clk);
+	ret = clk_prepare_enable(asrc_priv->mem_clk);
+	if (ret)
+		return ret;
+	ret = clk_prepare_enable(asrc_priv->ipg_clk);
+	if (ret)
+		goto disable_mem_clk;
 	for (i = 0; i < ASRC_CLK_MAX_NUM; i++)
 		clk_prepare_enable(asrc_priv->asrck_clk[i]);
 
 	return 0;
+
+disable_mem_clk:
+	clk_disable_unprepare(asrc_priv->mem_clk);
+	return ret;
 }
 
 static int fsl_asrc_runtime_suspend(struct device *dev)
Signature · 1 line
1.9.1
reviewer
#1 lore raw
Quoted 22 lines · Fabio Estevam

From: Fabio Estevam <[email protected]>

clk_prepare_enable() may fail, so we should better check its return value and propagate it in the case of error.

Signed-off-by Fabio Estevam <[email protected]>
---
 sound/soc/fsl/fsl_asrc.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)
sound/soc/fsl/fsl_asrc.c +1 -2
index c068494..37dde26 100644
@@ -931,14 +931,22 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 static int fsl_asrc_runtime_resume(struct device *dev)
 {
 	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
-	int i;
+	int i, ret;
 
-	clk_prepare_enable(asrc_priv->mem_clk);

sound/soc/fsl/fsl_asrc.c static int fsl_asrc_probe(struct platform_device *pdev) · line 944

Quoted 10 lines
sound/soc/fsl/fsl_asrc.c +6 -1
-	clk_prepare_enable(asrc_priv->ipg_clk);
+	ret = clk_prepare_enable(asrc_priv->mem_clk);
+	if (ret)
+		return ret;
+	ret = clk_prepare_enable(asrc_priv->ipg_clk);
+	if (ret)
+		goto disable_mem_clk;
 
 	for (i = 0; i < ASRC_CLK_MAX_NUM; i++)
 		clk_prepare_enable(asrc_priv->asrck_clk[i]);

How about these clocks?

disable_clk:

	for (i--; i >= 0; i--)
		clk_disable_unprepare(asrc_priv->asrc_clk[i]);

Might be better?

Thank you
Nicolin