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SubjectApplied "ASoC: fsl_mqs: Fix error handling in probe" to the asoc tree
The patch

ASoC: fsl_mqs: Fix error handling in probe

has been applied to the asoc tree at for-5.5

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tree (usually sometime in the next 24 hours) and sent to Linus during
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From a9d273671440c439c4f236123c59dd839c1a0eb7 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <>
Date: Fri, 4 Oct 2019 13:22:09 +0300
Subject: [PATCH] ASoC: fsl_mqs: Fix error handling in probe

There are several problems in the error handling in fsl_mqs_probe().

1) "ret" isn't initialized on some paths. GCC has a feature which
warns about uninitialized variables but the code initializes "ret"
to zero at the start of the function so the checking is turned off.
2) "gpr_np" is a pointer so initializing it to zero is confusing and
generates a Sparse warning.
3) of_parse_phandle() doesn't return error pointers on error, it returns
4) If devm_snd_soc_register_component() fails then the function should
free the "gpr_np".

Fixes: 9e28f6532c61 ("ASoC: fsl_mqs: Add MQS component driver")
Signed-off-by: Dan Carpenter <>
Signed-off-by: Mark Brown <>
sound/soc/fsl/fsl_mqs.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/sound/soc/fsl/fsl_mqs.c b/sound/soc/fsl/fsl_mqs.c
index 7b9cab3a62e7..f7fc44e8fb27 100644
--- a/sound/soc/fsl/fsl_mqs.c
+++ b/sound/soc/fsl/fsl_mqs.c
@@ -178,10 +178,10 @@ static const struct regmap_config fsl_mqs_regmap_config = {
static int fsl_mqs_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
- struct device_node *gpr_np = 0;
+ struct device_node *gpr_np = NULL;
struct fsl_mqs *mqs_priv;
void __iomem *regs;
- int ret = 0;
+ int ret;

mqs_priv = devm_kzalloc(&pdev->dev, sizeof(*mqs_priv), GFP_KERNEL);
if (!mqs_priv)
@@ -198,17 +198,16 @@ static int fsl_mqs_probe(struct platform_device *pdev)

if (mqs_priv->use_gpr) {
gpr_np = of_parse_phandle(np, "gpr", 0);
- if (IS_ERR(gpr_np)) {
+ if (!gpr_np) {
dev_err(&pdev->dev, "failed to get gpr node by phandle\n");
- ret = PTR_ERR(gpr_np);
- goto out;
+ return -EINVAL;

mqs_priv->regmap = syscon_node_to_regmap(gpr_np);
if (IS_ERR(mqs_priv->regmap)) {
dev_err(&pdev->dev, "failed to get gpr regmap\n");
ret = PTR_ERR(mqs_priv->regmap);
- goto out;
+ goto err_free_gpr_np;
} else {
regs = devm_platform_ioremap_resource(pdev, 0);
@@ -229,7 +228,7 @@ static int fsl_mqs_probe(struct platform_device *pdev)
if (IS_ERR(mqs_priv->ipg)) {
dev_err(&pdev->dev, "failed to get the clock: %ld\n",
- goto out;
+ return PTR_ERR(mqs_priv->ipg);

@@ -237,17 +236,21 @@ static int fsl_mqs_probe(struct platform_device *pdev)
if (IS_ERR(mqs_priv->mclk)) {
dev_err(&pdev->dev, "failed to get the clock: %ld\n",
- goto out;
+ ret = PTR_ERR(mqs_priv->mclk);
+ goto err_free_gpr_np;

dev_set_drvdata(&pdev->dev, mqs_priv);

- return devm_snd_soc_register_component(&pdev->dev, &soc_codec_fsl_mqs,
+ ret = devm_snd_soc_register_component(&pdev->dev, &soc_codec_fsl_mqs,
&fsl_mqs_dai, 1);
- if (!IS_ERR(gpr_np))
- of_node_put(gpr_np);
+ if (ret)
+ goto err_free_gpr_np;
+ return 0;
+ of_node_put(gpr_np);

return ret;
 \ /
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