diff mbox series

[RFC,v2,04/11] devfreq: exynos-bus: Clean up code

Message ID 20190919142236.4071-5-a.swigon@samsung.com (mailing list archive)
State RFC, archived
Headers show
Series Simple QoS for exynos-bus driver using interconnect | expand

Commit Message

Artur Świgoń Sept. 19, 2019, 2:22 p.m. UTC 
From: Artur Świgoń <a.swigon@partner.samsung.com>

This patch adds minor improvements to the exynos-bus driver.

Signed-off-by: Artur Świgoń <a.swigon@partner.samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/devfreq/exynos-bus.c | 66 ++++++++++++++----------------------
 1 file changed, 25 insertions(+), 41 deletions(-)

Comments

Chanwoo Choi Sept. 20, 2019, 2:22 a.m. UTC | #1 
Hi Artur,

On 19. 9. 19. 오후 11:22, Artur Świgoń wrote:
> From: Artur Świgoń <a.swigon@partner.samsung.com>
> 
> This patch adds minor improvements to the exynos-bus driver.
> 
> Signed-off-by: Artur Świgoń <a.swigon@partner.samsung.com>
> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
>  drivers/devfreq/exynos-bus.c | 66 ++++++++++++++----------------------
>  1 file changed, 25 insertions(+), 41 deletions(-)
> 
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 60ad4319fd80..8d44810cac69 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
>  
> @@ -178,7 +177,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
>  	struct device *dev = bus->dev;
>  	struct opp_table *opp_table;
>  	const char *vdd = "vdd";
> -	int i, ret, count, size;
> +	int i, ret, count;
>  
>  	opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
>  	if (IS_ERR(opp_table)) {
> @@ -201,8 +200,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
>  	}
>  	bus->edev_count = count;
>  
> -	size = sizeof(*bus->edev) * count;
> -	bus->edev = devm_kzalloc(dev, size, GFP_KERNEL);
> +	bus->edev = devm_kcalloc(dev, count, sizeof(*bus->edev), GFP_KERNEL);
>  	if (!bus->edev) {
>  		ret = -ENOMEM;
>  		goto err_regulator;
> @@ -301,10 +299,9 @@ 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;
>  
> @@ -314,8 +311,7 @@ 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);
>  	}
>  
>  	/*
> @@ -325,16 +321,13 @@ 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) {
> +	if (ret < 0)
>  		dev_err(dev, "failed to set event to devfreq-event devices\n");
> -		goto err;

Instead of removing 'goto err', just return err as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331

> -	}
>  
> -err:
>  	return ret;

And you just keep 'return ret' or you can change it as 'return 0'.


>  }
>  
> @@ -344,7 +337,6 @@ 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;
> @@ -352,30 +344,26 @@ 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 */
> -	bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
> +	bus->devfreq = devm_devfreq_add_device(dev, profile,
> +						DEVFREQ_GOV_PASSIVE,
>  						passive_data);
>  	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)
> @@ -393,18 +381,18 @@ static int exynos_bus_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
> +	bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL);
>  	if (!bus)
>  		return -ENOMEM;
>  	mutex_init(&bus->lock);
> -	bus->dev = &pdev->dev;
> +	bus->dev = dev;
>  	platform_set_drvdata(pdev, bus);
>  
>  	profile = devm_kzalloc(dev, sizeof(*profile), GFP_KERNEL);
>  	if (!profile)
>  		return -ENOMEM;
>  
> -	node = of_parse_phandle(dev->of_node, "devfreq", 0);
> +	node = of_parse_phandle(np, "devfreq", 0);
>  	if (node) {
>  		of_node_put(node);
>  		passive = true;
> @@ -461,12 +449,10 @@ static int exynos_bus_resume(struct device *dev)
>  	int ret;
>  
>  	ret = exynos_bus_enable_edev(bus);
> -	if (ret < 0) {
> +	if (ret < 0)
>  		dev_err(dev, "failed to enable the devfreq-event devices\n");
> -		return ret;

Keep the 'return ret' if error happen as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331

> -	}
>  
> -	return 0;
> +	return ret;

And you just keep 'return 0' or you can change it as 'return ret'.

>  }
>  
>  static int exynos_bus_suspend(struct device *dev)
> @@ -475,12 +461,10 @@ static int exynos_bus_suspend(struct device *dev)
>  	int ret;
>  
>  	ret = exynos_bus_disable_edev(bus);
> -	if (ret < 0) {
> +	if (ret < 0)
>  		dev_err(dev, "failed to disable the devfreq-event devices\n");
> -		return ret;

Keep the 'return ret' if error happen as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331

> -	}
>  
> -	return 0;
> +	return ret;

And you just keep 'return 0' or you can change it as 'return ret'.

>  }
>  #endif
>  
>
Artur Świgoń Oct. 3, 2019, 8:10 a.m. UTC | #2 
Hi,

On Fri, 2019-09-20 at 11:22 +0900, Chanwoo Choi wrote:
> Hi Artur,
> 
> On 19. 9. 19. 오후 11:22, Artur Świgoń wrote:
> > From: Artur Świgoń <a.swigon@partner.samsung.com>
> > 
> > This patch adds minor improvements to the exynos-bus driver.
> > 
> > Signed-off-by: Artur Świgoń <a.swigon@partner.samsung.com>
> > Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
> > ---
> >  drivers/devfreq/exynos-bus.c | 66 ++++++++++++++----------------------
> >  1 file changed, 25 insertions(+), 41 deletions(-)
> > 
> > diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> > index 60ad4319fd80..8d44810cac69 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
> >  
> > @@ -178,7 +177,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> >  	struct device *dev = bus->dev;
> >  	struct opp_table *opp_table;
> >  	const char *vdd = "vdd";
> > -	int i, ret, count, size;
> > +	int i, ret, count;
> >  
> >  	opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
> >  	if (IS_ERR(opp_table)) {
> > @@ -201,8 +200,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> >  	}
> >  	bus->edev_count = count;
> >  
> > -	size = sizeof(*bus->edev) * count;
> > -	bus->edev = devm_kzalloc(dev, size, GFP_KERNEL);
> > +	bus->edev = devm_kcalloc(dev, count, sizeof(*bus->edev), GFP_KERNEL);
> >  	if (!bus->edev) {
> >  		ret = -ENOMEM;
> >  		goto err_regulator;
> > @@ -301,10 +299,9 @@ 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;
> >  
> > @@ -314,8 +311,7 @@ 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);
> >  	}
> >  
> >  	/*
> > @@ -325,16 +321,13 @@ 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) {
> > +	if (ret < 0)
> >  		dev_err(dev, "failed to set event to devfreq-event devices\n");
> > -		goto err;
> 
> Instead of removing 'goto err', just return err as I commented[1] on v1.
> [1] https://lkml.org/lkml/2019/7/26/331
> 
> > -	}
> >  
> > -err:
> >  	return ret;
> 
> And you just keep 'return ret' or you can change it as 'return 0'.

OK, I went for:

ret = exynos_bus_set_event(bus);
if (ret < 0) {
	dev_err(dev, "failed to set event to devfreq-event devices\n");
	return ret;
}

return 0;

> >  }
> >  
> > @@ -344,7 +337,6 @@ 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;
> > @@ -352,30 +344,26 @@ 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 */
> > -	bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
> > +	bus->devfreq = devm_devfreq_add_device(dev, profile,
> > +						DEVFREQ_GOV_PASSIVE,
> >  						passive_data);
> >  	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)
> > @@ -393,18 +381,18 @@ static int exynos_bus_probe(struct platform_device *pdev)
> >  		return -EINVAL;
> >  	}
> >  
> > -	bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
> > +	bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL);
> >  	if (!bus)
> >  		return -ENOMEM;
> >  	mutex_init(&bus->lock);
> > -	bus->dev = &pdev->dev;
> > +	bus->dev = dev;
> >  	platform_set_drvdata(pdev, bus);
> >  
> >  	profile = devm_kzalloc(dev, sizeof(*profile), GFP_KERNEL);
> >  	if (!profile)
> >  		return -ENOMEM;
> >  
> > -	node = of_parse_phandle(dev->of_node, "devfreq", 0);
> > +	node = of_parse_phandle(np, "devfreq", 0);
> >  	if (node) {
> >  		of_node_put(node);
> >  		passive = true;
> > @@ -461,12 +449,10 @@ static int exynos_bus_resume(struct device *dev)
> >  	int ret;
> >  
> >  	ret = exynos_bus_enable_edev(bus);
> > -	if (ret < 0) {
> > +	if (ret < 0)
> >  		dev_err(dev, "failed to enable the devfreq-event devices\n");
> > -		return ret;
> 
> Keep the 'return ret' if error happen as I commented[1] on v1.
> [1] https://lkml.org/lkml/2019/7/26/331
> 
> > -	}
> >  
> > -	return 0;
> > +	return ret;
> 
> And you just keep 'return 0' or you can change it as 'return ret'.

OK, I kept the original code:

ret = exynos_bus_enable_edev(bus);
if (ret < 0) {
	dev_err(dev, "failed to enable the devfreq-event devices\n");
	return ret;
}

return 0;

> >  }
> >  
> >  static int exynos_bus_suspend(struct device *dev)
> > @@ -475,12 +461,10 @@ static int exynos_bus_suspend(struct device *dev)
> >  	int ret;
> >  
> >  	ret = exynos_bus_disable_edev(bus);
> > -	if (ret < 0) {
> > +	if (ret < 0)
> >  		dev_err(dev, "failed to disable the devfreq-event devices\n");
> > -		return ret;
> 
> Keep the 'return ret' if error happen as I commented[1] on v1.
> [1] https://lkml.org/lkml/2019/7/26/331

OK, I kept the original code.

> > -	}
> >  
> > -	return 0;
> > +	return ret;
> 
> And you just keep 'return 0' or you can change it as 'return ret'.
> 
> >  }
> >  #endif
> >  
> > 
> 
> 

Best regards,
diff mbox series

Patch

diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 60ad4319fd80..8d44810cac69 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
 
@@ -178,7 +177,7 @@  static int exynos_bus_parent_parse_of(struct device_node *np,
 	struct device *dev = bus->dev;
 	struct opp_table *opp_table;
 	const char *vdd = "vdd";
-	int i, ret, count, size;
+	int i, ret, count;
 
 	opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
 	if (IS_ERR(opp_table)) {
@@ -201,8 +200,7 @@  static int exynos_bus_parent_parse_of(struct device_node *np,
 	}
 	bus->edev_count = count;
 
-	size = sizeof(*bus->edev) * count;
-	bus->edev = devm_kzalloc(dev, size, GFP_KERNEL);
+	bus->edev = devm_kcalloc(dev, count, sizeof(*bus->edev), GFP_KERNEL);
 	if (!bus->edev) {
 		ret = -ENOMEM;
 		goto err_regulator;
@@ -301,10 +299,9 @@  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;
 
@@ -314,8 +311,7 @@  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);
 	}
 
 	/*
@@ -325,16 +321,13 @@  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) {
+	if (ret < 0)
 		dev_err(dev, "failed to set event to devfreq-event devices\n");
-		goto err;
-	}
 
-err:
 	return ret;
 }
 
@@ -344,7 +337,6 @@  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;
@@ -352,30 +344,26 @@  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 */
-	bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
+	bus->devfreq = devm_devfreq_add_device(dev, profile,
+						DEVFREQ_GOV_PASSIVE,
 						passive_data);
 	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)
@@ -393,18 +381,18 @@  static int exynos_bus_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
+	bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL);
 	if (!bus)
 		return -ENOMEM;
 	mutex_init(&bus->lock);
-	bus->dev = &pdev->dev;
+	bus->dev = dev;
 	platform_set_drvdata(pdev, bus);
 
 	profile = devm_kzalloc(dev, sizeof(*profile), GFP_KERNEL);
 	if (!profile)
 		return -ENOMEM;
 
-	node = of_parse_phandle(dev->of_node, "devfreq", 0);
+	node = of_parse_phandle(np, "devfreq", 0);
 	if (node) {
 		of_node_put(node);
 		passive = true;
@@ -461,12 +449,10 @@  static int exynos_bus_resume(struct device *dev)
 	int ret;
 
 	ret = exynos_bus_enable_edev(bus);
-	if (ret < 0) {
+	if (ret < 0)
 		dev_err(dev, "failed to enable the devfreq-event devices\n");
-		return ret;
-	}
 
-	return 0;
+	return ret;
 }
 
 static int exynos_bus_suspend(struct device *dev)
@@ -475,12 +461,10 @@  static int exynos_bus_suspend(struct device *dev)
 	int ret;
 
 	ret = exynos_bus_disable_edev(bus);
-	if (ret < 0) {
+	if (ret < 0)
 		dev_err(dev, "failed to disable the devfreq-event devices\n");
-		return ret;
-	}
 
-	return 0;
+	return ret;
 }
 #endif