[PATCH v3 0/4] ASoC: fsl: audmix: remove "model" attribute and fix ref leaks

[PATCH v3 0/4] ASoC: fsl: audmix: remove "model" attribute and fix ref leaks

[Viorel Suman]

The latest audmix patch-set (v5) had the "model" attribute removed as
requested by Nicolin Chen, but looks like (v4) version of DAI driver
reached "for-next" branch - fix this by removing "model" attribute.
Asside of this fix object reference leaks in machine probe reported by
Julia Lawall.

Viorel Suman (4):
  ASoC: fsl_audmix: remove "model" attribute
  dt-bindings: fsl,audmix: remove "model" attribute
  ASoC: imx-audmix: fix object reference leaks in probe
  ASoC: fsl_audmix: cache pdev->dev pointer

Changes since V1:
  a) Removed "model" attribute from dt-bindings documentation
  b) Adressed Daniel's comments

Changes since V2:
  a) Cache pdev->dev pointer in fsl_audmix probe as suggested by Nicolin

 .../devicetree/bindings/sound/fsl,audmix.txt       |  4 --
 sound/soc/fsl/fsl_audmix.c                         | 61 ++++++++++++----------
 sound/soc/fsl/imx-audmix.c                         |  4 ++
 3 files changed, 36 insertions(+), 33 deletions(-)

-- 
2.7.4

[PATCH v3 1/4] ASoC: fsl_audmix: remove "model" attribute

[Viorel Suman]

Use "of_device_id.data" to specify the machine driver
instead of "model" DTS attribute.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
 sound/soc/fsl/fsl_audmix.c | 43 +++++++++++++++++++++++--------------------
 1 file changed, 23 insertions(+), 20 deletions(-)

diff --git a/sound/soc/fsl/fsl_audmix.c b/sound/soc/fsl/fsl_audmix.c
index dabde03..dc802d5 100644
--- a/sound/soc/fsl/fsl_audmix.c
+++ b/sound/soc/fsl/fsl_audmix.c
@@ -445,13 +445,29 @@ static const struct regmap_config fsl_audmix_regmap_config = {
 	.cache_type = REGCACHE_FLAT,
 };
 
+static const struct of_device_id fsl_audmix_ids[] = {
+	{
+		.compatible = "fsl,imx8qm-audmix",
+		.data = "imx-audmix",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_audmix_ids);
+
 static int fsl_audmix_probe(struct platform_device *pdev)
 {
 	struct fsl_audmix *priv;
 	struct resource *res;
+	const char *mdrv;
+	const struct of_device_id *of_id;
 	void __iomem *regs;
 	int ret;
-	const char *sprop;
+
+	of_id = of_match_device(fsl_audmix_ids, &pdev->dev);
+	if (!of_id || !of_id->data)
+		return -EINVAL;
+
+	mdrv = of_id->data;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -487,19 +503,12 @@ static int fsl_audmix_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	sprop = of_get_property(pdev->dev.of_node, "model", NULL);
-	if (sprop) {
-		priv->pdev = platform_device_register_data(&pdev->dev, sprop, 0,
-							   NULL, 0);
-		if (IS_ERR(priv->pdev)) {
-			ret = PTR_ERR(priv->pdev);
-			dev_err(&pdev->dev,
-				"failed to register platform %s: %d\n", sprop,
-				 ret);
-		}
-	} else {
-		dev_err(&pdev->dev, "[model] attribute missing.\n");
-		ret = -EINVAL;
+	priv->pdev = platform_device_register_data(&pdev->dev, mdrv, 0, NULL,
+						   0);
+	if (IS_ERR(priv->pdev)) {
+		ret = PTR_ERR(priv->pdev);
+		dev_err(&pdev->dev, "failed to register platform %s: %d\n",
+			mdrv, ret);
 	}
 
 	return ret;
@@ -553,12 +562,6 @@ static const struct dev_pm_ops fsl_audmix_pm = {
 				pm_runtime_force_resume)
 };
 
-static const struct of_device_id fsl_audmix_ids[] = {
-	{ .compatible = "fsl,imx8qm-audmix", },
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, fsl_audmix_ids);
-
 static struct platform_driver fsl_audmix_driver = {
 	.probe = fsl_audmix_probe,
 	.remove = fsl_audmix_remove,
-- 
2.7.4

[PATCH v3 2/4] dt-bindings: fsl,audmix: remove "model" attribute

[Viorel Suman]

Remove "model" attribute.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
 Documentation/devicetree/bindings/sound/fsl,audmix.txt | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl,audmix.txt b/Documentation/devicetree/bindings/sound/fsl,audmix.txt
index 45f807e..840b7e0 100644
--- a/Documentation/devicetree/bindings/sound/fsl,audmix.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,audmix.txt
@@ -38,9 +38,6 @@ Device driver required properties:
 			  to SAI interfaces to be provided, the first SAI in the
 			  list being used to route the AUDMIX output.
 
-  - model		: Must contain machine driver name which will configure
-			  and instantiate the appropriate audio card.
-
 Device driver configuration example:
 ======================================
   audmix: audmix@59840000 {
@@ -50,5 +47,4 @@ Device driver configuration example:
     clock-names = "ipg";
     power-domains = <&pd_audmix>;
     dais = <&sai4>, <&sai5>;
-    model = "imx-audmix";
   };
-- 
2.7.4

Re: [PATCH v3 2/4] dt-bindings: fsl,audmix: remove "model" attribute

[Mark Brown]

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On Wed, Apr 10, 2019 at 10:37:30AM +0000, Viorel Suman wrote:
> Remove "model" attribute.
> 
> Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
> Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>

Please use subject lines matching the style for the subsystem.  This
makes it easier for people to identify relevant patches.

[-- Attachment #2: signature.asc --]
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Re: [EXT] Re: [PATCH v3 2/4] dt-bindings: fsl, audmix: remove "model" attribute

[Viorel Suman]

Hi Mark,

On Mi, 2019-04-10 at 11:39 +0100, Mark Brown wrote:
> On Wed, Apr 10, 2019 at 10:37:30AM +0000, Viorel Suman wrote:
> > 
> > Remove "model" attribute.
> > 
> > Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
> > Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
> Please use subject lines matching the style for the subsystem.  This
> makes it easier for people to identify relevant patches.

Sure, thank you, do I have to send V4 with subject fixed ?

[PATCH v3 3/4] ASoC: imx-audmix: fix object reference leaks in probe

[Viorel Suman]

Release the reference to the underlying device taken
by of_find_device_by_node() call.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Reported-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
 sound/soc/fsl/imx-audmix.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/fsl/imx-audmix.c b/sound/soc/fsl/imx-audmix.c
index 7983bd3..9aaf3e5 100644
--- a/sound/soc/fsl/imx-audmix.c
+++ b/sound/soc/fsl/imx-audmix.c
@@ -171,6 +171,7 @@ static int imx_audmix_probe(struct platform_device *pdev)
 			np->full_name);
 		return -EINVAL;
 	}
+	put_device(&audmix_pdev->dev);
 
 	num_dai = of_count_phandle_with_args(audmix_np, "dais", NULL);
 	if (num_dai != FSL_AUDMIX_MAX_DAIS) {
@@ -216,6 +217,7 @@ static int imx_audmix_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "failed to find SAI platform device\n");
 			return -EINVAL;
 		}
+		put_device(&cpu_pdev->dev);
 
 		dai_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s%s",
 					  fe_name_pref, args.np->full_name + 1);
@@ -280,6 +282,8 @@ static int imx_audmix_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "failed to find SAI platform device\n");
 		return -EINVAL;
 	}
+	put_device(&cpu_pdev->dev);
+
 	priv->cpu_mclk = devm_clk_get(&cpu_pdev->dev, "mclk1");
 	if (IS_ERR(priv->cpu_mclk)) {
 		ret = PTR_ERR(priv->cpu_mclk);
-- 
2.7.4

[PATCH v3 4/4] ASoC: fsl_audmix: cache pdev->dev pointer

[Viorel Suman]

There should be no trouble to understand dev = pdev->dev.
This can save some space to have more print info or save
some wrapped lines.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Suggested-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
 sound/soc/fsl/fsl_audmix.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/sound/soc/fsl/fsl_audmix.c b/sound/soc/fsl/fsl_audmix.c
index dc802d5..2d10d8b 100644
--- a/sound/soc/fsl/fsl_audmix.c
+++ b/sound/soc/fsl/fsl_audmix.c
@@ -456,6 +456,7 @@ MODULE_DEVICE_TABLE(of, fsl_audmix_ids);
 
 static int fsl_audmix_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct fsl_audmix *priv;
 	struct resource *res;
 	const char *mdrv;
@@ -463,51 +464,50 @@ static int fsl_audmix_probe(struct platform_device *pdev)
 	void __iomem *regs;
 	int ret;
 
-	of_id = of_match_device(fsl_audmix_ids, &pdev->dev);
+	of_id = of_match_device(fsl_audmix_ids, dev);
 	if (!of_id || !of_id->data)
 		return -EINVAL;
 
 	mdrv = of_id->data;
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
 	/* Get the addresses */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	regs = devm_ioremap_resource(&pdev->dev, res);
+	regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
-	priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "ipg", regs,
+	priv->regmap = devm_regmap_init_mmio_clk(dev, "ipg", regs,
 						 &fsl_audmix_regmap_config);
 	if (IS_ERR(priv->regmap)) {
-		dev_err(&pdev->dev, "failed to init regmap\n");
+		dev_err(dev, "failed to init regmap\n");
 		return PTR_ERR(priv->regmap);
 	}
 
-	priv->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
+	priv->ipg_clk = devm_clk_get(dev, "ipg");
 	if (IS_ERR(priv->ipg_clk)) {
-		dev_err(&pdev->dev, "failed to get ipg clock\n");
+		dev_err(dev, "failed to get ipg clock\n");
 		return PTR_ERR(priv->ipg_clk);
 	}
 
 	platform_set_drvdata(pdev, priv);
-	pm_runtime_enable(&pdev->dev);
+	pm_runtime_enable(dev);
 
-	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_audmix_component,
+	ret = devm_snd_soc_register_component(dev, &fsl_audmix_component,
 					      fsl_audmix_dai,
 					      ARRAY_SIZE(fsl_audmix_dai));
 	if (ret) {
-		dev_err(&pdev->dev, "failed to register ASoC DAI\n");
+		dev_err(dev, "failed to register ASoC DAI\n");
 		return ret;
 	}
 
-	priv->pdev = platform_device_register_data(&pdev->dev, mdrv, 0, NULL,
-						   0);
+	priv->pdev = platform_device_register_data(dev, mdrv, 0, NULL, 0);
 	if (IS_ERR(priv->pdev)) {
 		ret = PTR_ERR(priv->pdev);
-		dev_err(&pdev->dev, "failed to register platform %s: %d\n",
+		dev_err(dev, "failed to register platform %s: %d\n",
 			mdrv, ret);
 	}
 
-- 
2.7.4