diff mbox series

[v2,7/7] pwm: core: Simplify some devm_*pwm*() functions

Message ID 20210531194947.10770-7-andriy.shevchenko@linux.intel.com (mailing list archive)
State Superseded, archived
Headers show
Series [v2,1/7] docs: firmware-guide: ACPI: Add a PWM example | expand

Commit Message

Andy Shevchenko May 31, 2021, 7:49 p.m. UTC
Use devm_add_action_or_reset() instead of devres_alloc() and
devres_add(), which works the same. This will simplify the
code. There is no functional changes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: new patch
 drivers/pwm/core.c | 60 +++++++++++++++++++---------------------------
 1 file changed, 25 insertions(+), 35 deletions(-)

Comments

Uwe Kleine-König June 6, 2021, 9:45 p.m. UTC | #1
Hello Andy,

On Mon, May 31, 2021 at 10:49:47PM +0300, Andy Shevchenko wrote:
> Use devm_add_action_or_reset() instead of devres_alloc() and
> devres_add(), which works the same. This will simplify the
> code. There is no functional changes.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> v2: new patch
>  drivers/pwm/core.c | 60 +++++++++++++++++++---------------------------
>  1 file changed, 25 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
> index 6d4410bd9793..9f643414676b 100644
> --- a/drivers/pwm/core.c
> +++ b/drivers/pwm/core.c
> @@ -1059,9 +1059,9 @@ void pwm_put(struct pwm_device *pwm)
>  }
>  EXPORT_SYMBOL_GPL(pwm_put);
>  
> -static void devm_pwm_release(struct device *dev, void *res)
> +static void devm_pwm_release(void *pwm)
>  {
> -	pwm_put(*(struct pwm_device **)res);
> +	pwm_put(pwm);
>  }
>  
>  /**
> @@ -1077,19 +1077,16 @@ static void devm_pwm_release(struct device *dev, void *res)
>   */
>  struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id)
>  {
> -	struct pwm_device **ptr, *pwm;
> -
> -	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
> -	if (!ptr)
> -		return ERR_PTR(-ENOMEM);
> +	struct pwm_device *pwm;
> +	int ret;
>  
>  	pwm = pwm_get(dev, con_id);
> -	if (!IS_ERR(pwm)) {
> -		*ptr = pwm;
> -		devres_add(dev, ptr);
> -	} else {
> -		devres_free(ptr);
> -	}
> +	if (IS_ERR(pwm))
> +		return pwm;
> +
> +	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
> +	if (ret)
> +		return ERR_PTR(ret);
>  
>  	return pwm;
>  }
> @@ -1110,19 +1107,16 @@ EXPORT_SYMBOL_GPL(devm_pwm_get);
>  struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
>  				   const char *con_id)
>  {
> -	struct pwm_device **ptr, *pwm;
> -
> -	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
> -	if (!ptr)
> -		return ERR_PTR(-ENOMEM);
> +	struct pwm_device *pwm;
> +	int ret;
>  
>  	pwm = of_pwm_get(dev, np, con_id);
> -	if (!IS_ERR(pwm)) {
> -		*ptr = pwm;
> -		devres_add(dev, ptr);
> -	} else {
> -		devres_free(ptr);
> -	}
> +	if (IS_ERR(pwm))
> +		return pwm;
> +
> +	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
> +	if (ret)
> +		return ERR_PTR(ret);
>  
>  	return pwm;
>  }
> @@ -1144,23 +1138,19 @@ struct pwm_device *devm_fwnode_pwm_get(struct device *dev,
>  				       struct fwnode_handle *fwnode,
>  				       const char *con_id)
>  {
> -	struct pwm_device **ptr, *pwm = ERR_PTR(-ENODEV);
> -
> -	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
> -	if (!ptr)
> -		return ERR_PTR(-ENOMEM);
> +	struct pwm_device *pwm = ERR_PTR(-ENODEV);
> +	int ret;
>  
>  	if (is_of_node(fwnode))
>  		pwm = of_pwm_get(dev, to_of_node(fwnode), con_id);
>  	else if (is_acpi_node(fwnode))
>  		pwm = acpi_pwm_get(fwnode);
> +	if (IS_ERR(pwm))
> +		return pwm;
>  
> -	if (!IS_ERR(pwm)) {
> -		*ptr = pwm;
> -		devres_add(dev, ptr);
> -	} else {
> -		devres_free(ptr);
> -	}
> +	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
> +	if (ret)
> +		return ERR_PTR(ret);
>  

Another nice one:

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Thanks
Uwe
diff mbox series

Patch

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 6d4410bd9793..9f643414676b 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -1059,9 +1059,9 @@  void pwm_put(struct pwm_device *pwm)
 }
 EXPORT_SYMBOL_GPL(pwm_put);
 
-static void devm_pwm_release(struct device *dev, void *res)
+static void devm_pwm_release(void *pwm)
 {
-	pwm_put(*(struct pwm_device **)res);
+	pwm_put(pwm);
 }
 
 /**
@@ -1077,19 +1077,16 @@  static void devm_pwm_release(struct device *dev, void *res)
  */
 struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id)
 {
-	struct pwm_device **ptr, *pwm;
-
-	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return ERR_PTR(-ENOMEM);
+	struct pwm_device *pwm;
+	int ret;
 
 	pwm = pwm_get(dev, con_id);
-	if (!IS_ERR(pwm)) {
-		*ptr = pwm;
-		devres_add(dev, ptr);
-	} else {
-		devres_free(ptr);
-	}
+	if (IS_ERR(pwm))
+		return pwm;
+
+	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+	if (ret)
+		return ERR_PTR(ret);
 
 	return pwm;
 }
@@ -1110,19 +1107,16 @@  EXPORT_SYMBOL_GPL(devm_pwm_get);
 struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
 				   const char *con_id)
 {
-	struct pwm_device **ptr, *pwm;
-
-	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return ERR_PTR(-ENOMEM);
+	struct pwm_device *pwm;
+	int ret;
 
 	pwm = of_pwm_get(dev, np, con_id);
-	if (!IS_ERR(pwm)) {
-		*ptr = pwm;
-		devres_add(dev, ptr);
-	} else {
-		devres_free(ptr);
-	}
+	if (IS_ERR(pwm))
+		return pwm;
+
+	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+	if (ret)
+		return ERR_PTR(ret);
 
 	return pwm;
 }
@@ -1144,23 +1138,19 @@  struct pwm_device *devm_fwnode_pwm_get(struct device *dev,
 				       struct fwnode_handle *fwnode,
 				       const char *con_id)
 {
-	struct pwm_device **ptr, *pwm = ERR_PTR(-ENODEV);
-
-	ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return ERR_PTR(-ENOMEM);
+	struct pwm_device *pwm = ERR_PTR(-ENODEV);
+	int ret;
 
 	if (is_of_node(fwnode))
 		pwm = of_pwm_get(dev, to_of_node(fwnode), con_id);
 	else if (is_acpi_node(fwnode))
 		pwm = acpi_pwm_get(fwnode);
+	if (IS_ERR(pwm))
+		return pwm;
 
-	if (!IS_ERR(pwm)) {
-		*ptr = pwm;
-		devres_add(dev, ptr);
-	} else {
-		devres_free(ptr);
-	}
+	ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+	if (ret)
+		return ERR_PTR(ret);
 
 	return pwm;
 }