diff mbox series

devfreq: exynos-bus: Clean up code

Message ID 20191216101948.526-1-a.swigon@samsung.com (mailing list archive)
State Mainlined
Commit a440892142118e68d05940fde66afd0278ce3d45
Headers show
Series devfreq: exynos-bus: Clean up code | expand

Commit Message

Artur Świgoń Dec. 16, 2019, 10:19 a.m. UTC 
This patch improves code readability by changing the following construct:

>    if (cond)
>        goto passive;
>    foo();
>    goto out;
> passive:
>    bar();
> out:

into this:

>    if (cond)
>        bar();
>    else
>        foo();

as well as eliminating a few more goto statements and fixing header
includes.

Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
---
 drivers/devfreq/exynos-bus.c | 54 +++++++++++++-----------------------
 1 file changed, 19 insertions(+), 35 deletions(-)

Comments

Chanwoo Choi Dec. 16, 2019, 10:36 a.m. UTC | #1 
Hi,

If possible, you better to write the more correct patch title
because 'Clean up code' is too comprehensive.

And please add 'PM / devfreq: ...' prefix for the devfreq patch.
When you check the merged patches of driver/devfreq/,
you can know the this prefix for patch title was used.

On 12/16/19 7:19 PM, Artur Świgoń wrote:
> This patch improves code readability by changing the following construct:
> 
>>    if (cond)
>>        goto passive;
>>    foo();
>>    goto out;
>> passive:
>>    bar();
>> out:
> 
> into this:
> 
>>    if (cond)
>>        bar();
>>    else
>>        foo();

When you add the example, please remove '>' char.

> 
> as well as eliminating a few more goto statements and fixing header
> includes.

And better to write what to fix the header including.

> 
> Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
> ---
>  drivers/devfreq/exynos-bus.c | 54 +++++++++++++-----------------------
>  1 file changed, 19 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 19d9f9f8ced2..7f5917d59072 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -15,11 +15,10 @@
>  #include <linux/device.h>
>  #include <linux/export.h>
>  #include <linux/module.h>
> -#include <linux/of_device.h>
> +#include <linux/of.h>
>  #include <linux/pm_opp.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/consumer.h>
> -#include <linux/slab.h>
>  
>  #define DEFAULT_SATURATION_RATIO	40
>  
> @@ -301,10 +300,9 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
>  	profile->exit = exynos_bus_exit;
>  
>  	ondemand_data = devm_kzalloc(dev, sizeof(*ondemand_data), GFP_KERNEL);
> -	if (!ondemand_data) {
> -		ret = -ENOMEM;
> -		goto err;
> -	}
> +	if (!ondemand_data)
> +		return -ENOMEM;
> +
>  	ondemand_data->upthreshold = 40;
>  	ondemand_data->downdifferential = 5;
>  
> @@ -314,15 +312,14 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
>  						ondemand_data);
>  	if (IS_ERR(bus->devfreq)) {
>  		dev_err(dev, "failed to add devfreq device\n");
> -		ret = PTR_ERR(bus->devfreq);
> -		goto err;
> +		return PTR_ERR(bus->devfreq);
>  	}
>  
>  	/* Register opp_notifier to catch the change of OPP  */
>  	ret = devm_devfreq_register_opp_notifier(dev, bus->devfreq);
>  	if (ret < 0) {
>  		dev_err(dev, "failed to register opp notifier\n");
> -		goto err;
> +		return ret;
>  	}
>  
>  	/*
> @@ -332,17 +329,16 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
>  	ret = exynos_bus_enable_edev(bus);
>  	if (ret < 0) {
>  		dev_err(dev, "failed to enable devfreq-event devices\n");
> -		goto err;
> +		return ret;
>  	}
>  
>  	ret = exynos_bus_set_event(bus);
>  	if (ret < 0) {
>  		dev_err(dev, "failed to set event to devfreq-event devices\n");
> -		goto err;
> +		return ret;
>  	}
>  
> -err:
> -	return ret;
> +	return 0;
>  }
>  
>  static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
> @@ -351,7 +347,6 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
>  	struct device *dev = bus->dev;
>  	struct devfreq_passive_data *passive_data;
>  	struct devfreq *parent_devfreq;
> -	int ret = 0;
>  
>  	/* Initialize the struct profile and governor data for passive device */
>  	profile->target = exynos_bus_target;
> @@ -359,16 +354,13 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
>  
>  	/* Get the instance of parent devfreq device */
>  	parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
> -	if (IS_ERR(parent_devfreq)) {
> -		ret = -EPROBE_DEFER;
> -		goto err;
> -	}
> +	if (IS_ERR(parent_devfreq))
> +		return -EPROBE_DEFER;
>  
>  	passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
> -	if (!passive_data) {
> -		ret = -ENOMEM;
> -		goto err;
> -	}
> +	if (!passive_data)
> +		return -ENOMEM;
> +
>  	passive_data->parent = parent_devfreq;
>  
>  	/* Add devfreq device for exynos bus with passive governor */
> @@ -377,12 +369,10 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
>  	if (IS_ERR(bus->devfreq)) {
>  		dev_err(dev,
>  			"failed to add devfreq dev with passive governor\n");
> -		ret = PTR_ERR(bus->devfreq);
> -		goto err;
> +		return PTR_ERR(bus->devfreq);
>  	}
>  
> -err:
> -	return ret;
> +	return 0;
>  }
>  
>  static int exynos_bus_probe(struct platform_device *pdev)
> @@ -427,19 +417,13 @@ static int exynos_bus_probe(struct platform_device *pdev)
>  		goto err_reg;
>  
>  	if (passive)
> -		goto passive;
> -
> -	ret = exynos_bus_profile_init(bus, profile);
> -	if (ret < 0)
> -		goto err;
> +		ret = exynos_bus_profile_init_passive(bus, profile);
> +	else
> +		ret = exynos_bus_profile_init(bus, profile);
>  
> -	goto out;
> -passive:
> -	ret = exynos_bus_profile_init_passive(bus, profile);
>  	if (ret < 0)
>  		goto err;
>  
> -out:
>  	max_state = bus->devfreq->profile->max_state;
>  	min_freq = (bus->devfreq->profile->freq_table[0] / 1000);
>  	max_freq = (bus->devfreq->profile->freq_table[max_state - 1] / 1000);
>
diff mbox series

Patch

diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 19d9f9f8ced2..7f5917d59072 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -15,11 +15,10 @@ 
 #include <linux/device.h>
 #include <linux/export.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/pm_opp.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
-#include <linux/slab.h>
 
 #define DEFAULT_SATURATION_RATIO	40
 
@@ -301,10 +300,9 @@  static int exynos_bus_profile_init(struct exynos_bus *bus,
 	profile->exit = exynos_bus_exit;
 
 	ondemand_data = devm_kzalloc(dev, sizeof(*ondemand_data), GFP_KERNEL);
-	if (!ondemand_data) {
-		ret = -ENOMEM;
-		goto err;
-	}
+	if (!ondemand_data)
+		return -ENOMEM;
+
 	ondemand_data->upthreshold = 40;
 	ondemand_data->downdifferential = 5;
 
@@ -314,15 +312,14 @@  static int exynos_bus_profile_init(struct exynos_bus *bus,
 						ondemand_data);
 	if (IS_ERR(bus->devfreq)) {
 		dev_err(dev, "failed to add devfreq device\n");
-		ret = PTR_ERR(bus->devfreq);
-		goto err;
+		return PTR_ERR(bus->devfreq);
 	}
 
 	/* Register opp_notifier to catch the change of OPP  */
 	ret = devm_devfreq_register_opp_notifier(dev, bus->devfreq);
 	if (ret < 0) {
 		dev_err(dev, "failed to register opp notifier\n");
-		goto err;
+		return ret;
 	}
 
 	/*
@@ -332,17 +329,16 @@  static int exynos_bus_profile_init(struct exynos_bus *bus,
 	ret = exynos_bus_enable_edev(bus);
 	if (ret < 0) {
 		dev_err(dev, "failed to enable devfreq-event devices\n");
-		goto err;
+		return ret;
 	}
 
 	ret = exynos_bus_set_event(bus);
 	if (ret < 0) {
 		dev_err(dev, "failed to set event to devfreq-event devices\n");
-		goto err;
+		return ret;
 	}
 
-err:
-	return ret;
+	return 0;
 }
 
 static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
@@ -351,7 +347,6 @@  static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
 	struct device *dev = bus->dev;
 	struct devfreq_passive_data *passive_data;
 	struct devfreq *parent_devfreq;
-	int ret = 0;
 
 	/* Initialize the struct profile and governor data for passive device */
 	profile->target = exynos_bus_target;
@@ -359,16 +354,13 @@  static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
 
 	/* Get the instance of parent devfreq device */
 	parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
-	if (IS_ERR(parent_devfreq)) {
-		ret = -EPROBE_DEFER;
-		goto err;
-	}
+	if (IS_ERR(parent_devfreq))
+		return -EPROBE_DEFER;
 
 	passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
-	if (!passive_data) {
-		ret = -ENOMEM;
-		goto err;
-	}
+	if (!passive_data)
+		return -ENOMEM;
+
 	passive_data->parent = parent_devfreq;
 
 	/* Add devfreq device for exynos bus with passive governor */
@@ -377,12 +369,10 @@  static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
 	if (IS_ERR(bus->devfreq)) {
 		dev_err(dev,
 			"failed to add devfreq dev with passive governor\n");
-		ret = PTR_ERR(bus->devfreq);
-		goto err;
+		return PTR_ERR(bus->devfreq);
 	}
 
-err:
-	return ret;
+	return 0;
 }
 
 static int exynos_bus_probe(struct platform_device *pdev)
@@ -427,19 +417,13 @@  static int exynos_bus_probe(struct platform_device *pdev)
 		goto err_reg;
 
 	if (passive)
-		goto passive;
-
-	ret = exynos_bus_profile_init(bus, profile);
-	if (ret < 0)
-		goto err;
+		ret = exynos_bus_profile_init_passive(bus, profile);
+	else
+		ret = exynos_bus_profile_init(bus, profile);
 
-	goto out;
-passive:
-	ret = exynos_bus_profile_init_passive(bus, profile);
 	if (ret < 0)
 		goto err;
 
-out:
 	max_state = bus->devfreq->profile->max_state;
 	min_freq = (bus->devfreq->profile->freq_table[0] / 1000);
 	max_freq = (bus->devfreq->profile->freq_table[max_state - 1] / 1000);