5.4-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Weißschuh linux@weissschuh.net
[ Upstream commit a231eed10ed5a290129fda36ad7bcc263c53ff7d ]
Let the power supply core register the attribute. This ensures that the attribute is created before the device is announced to userspace, avoid a race condition.
Signed-off-by: Thomas Weißschuh linux@weissschuh.net Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/battery.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index a49a09e3de1b3..af78f76a28729 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -681,12 +681,18 @@ static ssize_t acpi_battery_alarm_store(struct device *dev, return count; }
-static const struct device_attribute alarm_attr = { +static struct device_attribute alarm_attr = { .attr = {.name = "alarm", .mode = 0644}, .show = acpi_battery_alarm_show, .store = acpi_battery_alarm_store, };
+static struct attribute *acpi_battery_attrs[] = { + &alarm_attr.attr, + NULL +}; +ATTRIBUTE_GROUPS(acpi_battery); + /* * The Battery Hooking API * @@ -823,7 +829,10 @@ static void __exit battery_hook_exit(void)
static int sysfs_add_battery(struct acpi_battery *battery) { - struct power_supply_config psy_cfg = { .drv_data = battery, }; + struct power_supply_config psy_cfg = { + .drv_data = battery, + .attr_grp = acpi_battery_groups, + }; bool full_cap_broken = false;
if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) && @@ -868,7 +877,7 @@ static int sysfs_add_battery(struct acpi_battery *battery) return result; } battery_hook_add_battery(battery); - return device_create_file(&battery->bat->dev, &alarm_attr); + return 0; }
static void sysfs_remove_battery(struct acpi_battery *battery) @@ -879,7 +888,6 @@ static void sysfs_remove_battery(struct acpi_battery *battery) return; } battery_hook_remove_battery(battery); - device_remove_file(&battery->bat->dev, &alarm_attr); power_supply_unregister(battery->bat); battery->bat = NULL; mutex_unlock(&battery->sysfs_lock);