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PM / devfreq: exynos-bus: Reduce goto statements and remove unused headers

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Improve code readability by changing the goto statements
as well as eliminating a few more goto statements (related to return
paths). Moreover, remove unused header file and adds a missing <linux/of.h>.

Signed-off-by: Artur Świgoń <a.swigon@samsung.com>
[cw00.choi: Edit patch title and description]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Artur Świgoń 2019-12-16 11:47:48 +01:00 committed by Chanwoo Choi
parent eff5d31f74
commit a440892142
1 changed files with 19 additions and 35 deletions
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54
drivers/devfreq/exynos-bus.c
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@ -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;
goto out;
passive:
ret = exynos_bus_profile_init_passive(bus, profile);
else
ret = exynos_bus_profile_init(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);