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[PATCH v4 2/4] mailbox: imx: support return value of init

Peng Fan (OSS) posted 4 patches 2 years ago
There is a newer version of this series
[PATCH v4 2/4] mailbox: imx: support return value of init
Posted by Peng Fan (OSS) 2 years ago 
From: Peng Fan <peng.fan@nxp.com>

There will be changes that init may fail, so adding return value for
init function.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/mailbox/imx-mailbox.c | 35 ++++++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 11 deletions(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 656171362fe9..dced4614065f 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -110,7 +110,7 @@ struct imx_mu_dcfg {
 	int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void *data);
 	int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
 	int (*rxdb)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
-	void (*init)(struct imx_mu_priv *priv);
+	int (*init)(struct imx_mu_priv *priv);
 	enum imx_mu_type type;
 	u32	xTR;		/* Transmit Register0 */
 	u32	xRR;		/* Receive Register0 */
@@ -737,7 +737,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct mbox_controller *mbox,
 	return imx_mu_xlate(mbox, sp);
 }
 
-static void imx_mu_init_generic(struct imx_mu_priv *priv)
+static int imx_mu_init_generic(struct imx_mu_priv *priv)
 {
 	unsigned int i;
 	unsigned int val;
@@ -757,7 +757,7 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv)
 	priv->mbox.of_xlate = imx_mu_xlate;
 
 	if (priv->side_b)
-		return;
+		return 0;
 
 	/* Set default MU configuration */
 	for (i = 0; i < IMX_MU_xCR_MAX; i++)
@@ -770,9 +770,11 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv)
 	/* Clear any pending RSR */
 	for (i = 0; i < IMX_MU_NUM_RR; i++)
 		imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4);
+
+	return 0;
 }
 
-static void imx_mu_init_specific(struct imx_mu_priv *priv)
+static int imx_mu_init_specific(struct imx_mu_priv *priv)
 {
 	unsigned int i;
 	int num_chans = priv->dcfg->type & IMX_MU_V2_S4 ? IMX_MU_S4_CHANS : IMX_MU_SCU_CHANS;
@@ -794,12 +796,20 @@ static void imx_mu_init_specific(struct imx_mu_priv *priv)
 	/* Set default MU configuration */
 	for (i = 0; i < IMX_MU_xCR_MAX; i++)
 		imx_mu_write(priv, 0, priv->dcfg->xCR[i]);
+
+	return 0;
 }
 
-static void imx_mu_init_seco(struct imx_mu_priv *priv)
+static int imx_mu_init_seco(struct imx_mu_priv *priv)
 {
-	imx_mu_init_generic(priv);
+	int ret;
+
+	ret = imx_mu_init_generic(priv);
+	if (ret)
+		return ret;
 	priv->mbox.of_xlate = imx_mu_seco_xlate;
+
+	return 0;
 }
 
 static int imx_mu_probe(struct platform_device *pdev)
@@ -866,7 +876,11 @@ static int imx_mu_probe(struct platform_device *pdev)
 
 	priv->side_b = of_property_read_bool(np, "fsl,mu-side-b");
 
-	priv->dcfg->init(priv);
+	ret = priv->dcfg->init(priv);
+	if (ret) {
+		dev_err(dev, "Failed to init MU\n");
+		goto disable_clk;
+	}
 
 	spin_lock_init(&priv->xcr_lock);
 
@@ -878,10 +892,8 @@ static int imx_mu_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, priv);
 
 	ret = devm_mbox_controller_register(dev, &priv->mbox);
-	if (ret) {
-		clk_disable_unprepare(priv->clk);
-		return ret;
-	}
+	if (ret)
+		goto disable_clk;
 
 	pm_runtime_enable(dev);
 
@@ -899,6 +911,7 @@ static int imx_mu_probe(struct platform_device *pdev)
 
 disable_runtime_pm:
 	pm_runtime_disable(dev);
+disable_clk:
 	clk_disable_unprepare(priv->clk);
 	return ret;
 }

-- 
2.37.1
Re: [PATCH v4 2/4] mailbox: imx: support return value of init
Posted by Alexander Stein 2 years ago 
Hi Peng,

Am Donnerstag, 25. Januar 2024, 06:20:04 CET schrieb Peng Fan (OSS):
> From: Peng Fan <peng.fan@nxp.com>
> 
> There will be changes that init may fail, so adding return value for
> init function.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/mailbox/imx-mailbox.c | 35 ++++++++++++++++++++++++-----------
>  1 file changed, 24 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
> index 656171362fe9..dced4614065f 100644
> --- a/drivers/mailbox/imx-mailbox.c
> +++ b/drivers/mailbox/imx-mailbox.c
> @@ -110,7 +110,7 @@ struct imx_mu_dcfg {
>  	int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void
> *data); int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
> int (*rxdb)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp); -	void
> (*init)(struct imx_mu_priv *priv);
> +	int (*init)(struct imx_mu_priv *priv);
>  	enum imx_mu_type type;
>  	u32	xTR;		/* Transmit Register0 */
>  	u32	xRR;		/* Receive Register0 */
> @@ -737,7 +737,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct
> mbox_controller *mbox, return imx_mu_xlate(mbox, sp);
>  }
> 
> -static void imx_mu_init_generic(struct imx_mu_priv *priv)
> +static int imx_mu_init_generic(struct imx_mu_priv *priv)
>  {
>  	unsigned int i;
>  	unsigned int val;
> @@ -757,7 +757,7 @@ static void imx_mu_init_generic(struct imx_mu_priv
> *priv) priv->mbox.of_xlate = imx_mu_xlate;
> 
>  	if (priv->side_b)
> -		return;
> +		return 0;
> 
>  	/* Set default MU configuration */
>  	for (i = 0; i < IMX_MU_xCR_MAX; i++)
> @@ -770,9 +770,11 @@ static void imx_mu_init_generic(struct imx_mu_priv
> *priv) /* Clear any pending RSR */
>  	for (i = 0; i < IMX_MU_NUM_RR; i++)
>  		imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4);
> +
> +	return 0;
>  }
> 
> -static void imx_mu_init_specific(struct imx_mu_priv *priv)
> +static int imx_mu_init_specific(struct imx_mu_priv *priv)
>  {
>  	unsigned int i;
>  	int num_chans = priv->dcfg->type & IMX_MU_V2_S4 ? IMX_MU_S4_CHANS :
> IMX_MU_SCU_CHANS; @@ -794,12 +796,20 @@ static void
> imx_mu_init_specific(struct imx_mu_priv *priv) /* Set default MU
> configuration */
>  	for (i = 0; i < IMX_MU_xCR_MAX; i++)
>  		imx_mu_write(priv, 0, priv->dcfg->xCR[i]);
> +
> +	return 0;
>  }
> 
> -static void imx_mu_init_seco(struct imx_mu_priv *priv)
> +static int imx_mu_init_seco(struct imx_mu_priv *priv)
>  {
> -	imx_mu_init_generic(priv);
> +	int ret;
> +
> +	ret = imx_mu_init_generic(priv);
> +	if (ret)
> +		return ret;
>  	priv->mbox.of_xlate = imx_mu_seco_xlate;
> +
> +	return 0;
>  }
> 
>  static int imx_mu_probe(struct platform_device *pdev)
> @@ -866,7 +876,11 @@ static int imx_mu_probe(struct platform_device *pdev)
> 
>  	priv->side_b = of_property_read_bool(np, "fsl,mu-side-b");
> 
> -	priv->dcfg->init(priv);
> +	ret = priv->dcfg->init(priv);
> +	if (ret) {
> +		dev_err(dev, "Failed to init MU\n");

As this is during probe, I rather use dev_err_probe right away. Even if dcfg-
>init won't return -EPROBE_DEFER for now.

Best regards,
Alexander

> +		goto disable_clk;
> +	}
> 
>  	spin_lock_init(&priv->xcr_lock);
> 
> @@ -878,10 +892,8 @@ static int imx_mu_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, priv);
> 
>  	ret = devm_mbox_controller_register(dev, &priv->mbox);
> -	if (ret) {
> -		clk_disable_unprepare(priv->clk);
> -		return ret;
> -	}
> +	if (ret)
> +		goto disable_clk;
> 
>  	pm_runtime_enable(dev);
> 
> @@ -899,6 +911,7 @@ static int imx_mu_probe(struct platform_device *pdev)
> 
>  disable_runtime_pm:
>  	pm_runtime_disable(dev);
> +disable_clk:
>  	clk_disable_unprepare(priv->clk);
>  	return ret;
>  }


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Re: [PATCH v4 2/4] mailbox: imx: support return value of init
Posted by Sascha Hauer 2 years ago 
On Thu, Jan 25, 2024 at 01:20:04PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> There will be changes that init may fail, so adding return value for
> init function.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>

Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>

Sascha

> ---
>  drivers/mailbox/imx-mailbox.c | 35 ++++++++++++++++++++++++-----------
>  1 file changed, 24 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
> index 656171362fe9..dced4614065f 100644
> --- a/drivers/mailbox/imx-mailbox.c
> +++ b/drivers/mailbox/imx-mailbox.c
> @@ -110,7 +110,7 @@ struct imx_mu_dcfg {
>  	int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void *data);
>  	int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
>  	int (*rxdb)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp);
> -	void (*init)(struct imx_mu_priv *priv);
> +	int (*init)(struct imx_mu_priv *priv);
>  	enum imx_mu_type type;
>  	u32	xTR;		/* Transmit Register0 */
>  	u32	xRR;		/* Receive Register0 */
> @@ -737,7 +737,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct mbox_controller *mbox,
>  	return imx_mu_xlate(mbox, sp);
>  }
>  
> -static void imx_mu_init_generic(struct imx_mu_priv *priv)
> +static int imx_mu_init_generic(struct imx_mu_priv *priv)
>  {
>  	unsigned int i;
>  	unsigned int val;
> @@ -757,7 +757,7 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv)
>  	priv->mbox.of_xlate = imx_mu_xlate;
>  
>  	if (priv->side_b)
> -		return;
> +		return 0;
>  
>  	/* Set default MU configuration */
>  	for (i = 0; i < IMX_MU_xCR_MAX; i++)
> @@ -770,9 +770,11 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv)
>  	/* Clear any pending RSR */
>  	for (i = 0; i < IMX_MU_NUM_RR; i++)
>  		imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4);
> +
> +	return 0;
>  }
>  
> -static void imx_mu_init_specific(struct imx_mu_priv *priv)
> +static int imx_mu_init_specific(struct imx_mu_priv *priv)
>  {
>  	unsigned int i;
>  	int num_chans = priv->dcfg->type & IMX_MU_V2_S4 ? IMX_MU_S4_CHANS : IMX_MU_SCU_CHANS;
> @@ -794,12 +796,20 @@ static void imx_mu_init_specific(struct imx_mu_priv *priv)
>  	/* Set default MU configuration */
>  	for (i = 0; i < IMX_MU_xCR_MAX; i++)
>  		imx_mu_write(priv, 0, priv->dcfg->xCR[i]);
> +
> +	return 0;
>  }
>  
> -static void imx_mu_init_seco(struct imx_mu_priv *priv)
> +static int imx_mu_init_seco(struct imx_mu_priv *priv)
>  {
> -	imx_mu_init_generic(priv);
> +	int ret;
> +
> +	ret = imx_mu_init_generic(priv);
> +	if (ret)
> +		return ret;
>  	priv->mbox.of_xlate = imx_mu_seco_xlate;
> +
> +	return 0;
>  }
>  
>  static int imx_mu_probe(struct platform_device *pdev)
> @@ -866,7 +876,11 @@ static int imx_mu_probe(struct platform_device *pdev)
>  
>  	priv->side_b = of_property_read_bool(np, "fsl,mu-side-b");
>  
> -	priv->dcfg->init(priv);
> +	ret = priv->dcfg->init(priv);
> +	if (ret) {
> +		dev_err(dev, "Failed to init MU\n");
> +		goto disable_clk;
> +	}
>  
>  	spin_lock_init(&priv->xcr_lock);
>  
> @@ -878,10 +892,8 @@ static int imx_mu_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, priv);
>  
>  	ret = devm_mbox_controller_register(dev, &priv->mbox);
> -	if (ret) {
> -		clk_disable_unprepare(priv->clk);
> -		return ret;
> -	}
> +	if (ret)
> +		goto disable_clk;
>  
>  	pm_runtime_enable(dev);
>  
> @@ -899,6 +911,7 @@ static int imx_mu_probe(struct platform_device *pdev)
>  
>  disable_runtime_pm:
>  	pm_runtime_disable(dev);
> +disable_clk:
>  	clk_disable_unprepare(priv->clk);
>  	return ret;
>  }
> 
> -- 
> 2.37.1
> 
> 
> 

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