diff options
| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2018-09-28 11:10:51 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2018-12-13 00:15:47 +0100 |
| commit | a45cefb0ca1fdec07495117c1d325d99fa9f5bbc (patch) | |
| tree | 86d103cb837357afd6ffb381660ef3bcaefd3974 /drivers/power | |
| parent | b10474aafe80cf50afe7d299d3cc8a60efe3e69b (diff) | |
| download | linux-a45cefb0ca1fdec07495117c1d325d99fa9f5bbc.tar.bz2 | |
power: supply: ds2781: fix race-condition in sysfs registration
This registers custom sysfs properties using the native functionality
of the power-supply framework, which cleans up the code a bit and
fixes a race-condition. Before this patch the sysfs attributes were
not properly registered to udev.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/ds2781_battery.c | 23 |
1 files changed, 4 insertions, 19 deletions
diff --git a/drivers/power/supply/ds2781_battery.c b/drivers/power/supply/ds2781_battery.c index 5e794607f732..dae05c5b72b4 100644 --- a/drivers/power/supply/ds2781_battery.c +++ b/drivers/power/supply/ds2781_battery.c @@ -726,7 +726,7 @@ static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin, ds2781_set_pio_pin); -static struct attribute *ds2781_attributes[] = { +static struct attribute *ds2781_sysfs_attrs[] = { &dev_attr_pmod_enabled.attr, &dev_attr_sense_resistor_value.attr, &dev_attr_rsgain_setting.attr, @@ -734,9 +734,7 @@ static struct attribute *ds2781_attributes[] = { NULL }; -static const struct attribute_group ds2781_attr_group = { - .attrs = ds2781_attributes, -}; +ATTRIBUTE_GROUPS(ds2781_sysfs); static int ds2781_battery_probe(struct platform_device *pdev) { @@ -759,6 +757,7 @@ static int ds2781_battery_probe(struct platform_device *pdev) dev_info->bat_desc.get_property = ds2781_battery_get_property; psy_cfg.drv_data = dev_info; + psy_cfg.attr_grp = ds2781_sysfs_groups; dev_info->bat = power_supply_register(&pdev->dev, &dev_info->bat_desc, &psy_cfg); @@ -768,18 +767,12 @@ static int ds2781_battery_probe(struct platform_device *pdev) goto fail; } - ret = sysfs_create_group(&dev_info->bat->dev.kobj, &ds2781_attr_group); - if (ret) { - dev_err(dev_info->dev, "failed to create sysfs group\n"); - goto fail_unregister; - } - ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj, &ds2781_param_eeprom_bin_attr); if (ret) { dev_err(dev_info->dev, "failed to create param eeprom bin file"); - goto fail_remove_group; + goto fail_unregister; } ret = sysfs_create_bin_file(&dev_info->bat->dev.kobj, @@ -795,8 +788,6 @@ static int ds2781_battery_probe(struct platform_device *pdev) fail_remove_bin_file: sysfs_remove_bin_file(&dev_info->bat->dev.kobj, &ds2781_param_eeprom_bin_attr); -fail_remove_group: - sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group); fail_unregister: power_supply_unregister(dev_info->bat); fail: @@ -807,12 +798,6 @@ static int ds2781_battery_remove(struct platform_device *pdev) { struct ds2781_device_info *dev_info = platform_get_drvdata(pdev); - /* - * Remove attributes before unregistering power supply - * because 'bat' will be freed on power_supply_unregister() call. - */ - sysfs_remove_group(&dev_info->bat->dev.kobj, &ds2781_attr_group); - power_supply_unregister(dev_info->bat); return 0; |