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power: supply: max17040: Use devm_ to automate remove 

Two actions were performed during remove - power supply dereg and
delayed work cleanup. Power supply dereg can be handled by using the
devm_ version of the registration function. Work cleanup can be added as
a devm_action.

If probe fails after psy registration it will now be cleaned up
properly.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Tested-by: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Iskren Chernev 2020-09-22 14:42:31 +03:00 committed by Sebastian Reichel
parent 05f94eb989
commit e55a50613d
1 changed files with 21 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/power/supply/max17040_battery.c
View File

@ -207,6 +207,19 @@ static void max17040_check_changes(struct i2c_client *client)
max17040_get_status(client);
}
static void max17040_queue_work(struct max17040_chip *chip)
{
queue_delayed_work(system_power_efficient_wq, &chip->work,
MAX17040_DELAY);
}
static void max17040_stop_work(void *data)
{
struct max17040_chip *chip = data;
cancel_delayed_work_sync(&chip->work);
}
static void max17040_work(struct work_struct *work)
{
struct max17040_chip *chip;
@ -223,8 +236,7 @@ static void max17040_work(struct work_struct *work)
if (last_soc != chip->soc || last_status != chip->status)
power_supply_changed(chip->battery);
queue_delayed_work(system_power_efficient_wq, &chip->work,
MAX17040_DELAY);
max17040_queue_work(chip);
}
static irqreturn_t max17040_thread_handler(int id, void *dev)
@ -339,7 +351,7 @@ static int max17040_probe(struct i2c_client *client,
i2c_set_clientdata(client, chip);
psy_cfg.drv_data = chip;
chip->battery = power_supply_register(&client->dev,
chip->battery = devm_power_supply_register(&client->dev,
&max17040_battery_desc, &psy_cfg);
if (IS_ERR(chip->battery)) {
dev_err(&client->dev, "failed: power supply register\n");
@ -368,21 +380,14 @@ static int max17040_probe(struct i2c_client *client,
}
INIT_DEFERRABLE_WORK(&chip->work, max17040_work);
queue_delayed_work(system_power_efficient_wq, &chip->work,
MAX17040_DELAY);
ret = devm_add_action(&client->dev, max17040_stop_work, chip);
if (ret)
return ret;
max17040_queue_work(chip);
return 0;
}
static int max17040_remove(struct i2c_client *client)
{
struct max17040_chip *chip = i2c_get_clientdata(client);
power_supply_unregister(chip->battery);
cancel_delayed_work(&chip->work);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int max17040_suspend(struct device *dev)
@ -403,12 +408,11 @@ static int max17040_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct max17040_chip *chip = i2c_get_clientdata(client);
queue_delayed_work(system_power_efficient_wq, &chip->work,
MAX17040_DELAY);
if (client->irq && device_may_wakeup(dev))
disable_irq_wake(client->irq);
max17040_queue_work(chip);
return 0;
}
@ -442,7 +446,6 @@ static struct i2c_driver max17040_i2c_driver = {
.pm = MAX17040_PM_OPS,
},
.probe = max17040_probe,
.remove = max17040_remove,
.id_table = max17040_id,
};
module_i2c_driver(max17040_i2c_driver);