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Subject[PATCH] devfreq: exynos-bus: Clean up code
Date
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(-)

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);
--
2.17.1
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