commit: c5971456964290da7e98222892797b71ef793e62 From: Andy Whitcroft <[email protected]> Date: Thu, 3 May 2012 14:48:26 +0100 Subject: ACPI battery: only refresh the sysfs files when pertinent information changes
We only need to regenerate the sysfs files when the capacity units change, avoid the update otherwise. The origin of this issue is dates way back to 2.6.38: da8aeb92d4853f37e281f11fddf61f9c7d84c3cd (ACPI / Battery: Update information on info notification and resume) cc: <[email protected]> Signed-off-by: Andy Whitcroft <[email protected]> Tested-by: Ralf Jung <[email protected]> Signed-off-by: Len Brown <[email protected]> --- drivers/acpi/battery.c | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-) diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 86933ca..7dd3f9f 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -643,11 +643,19 @@ static int acpi_battery_update(struct acpi_battery *battery) static void acpi_battery_refresh(struct acpi_battery *battery) { + int power_unit; + if (!battery->bat.dev) return; + power_unit = battery->power_unit; + acpi_battery_get_info(battery); - /* The battery may have changed its reporting units. */ + + if (power_unit == battery->power_unit) + return; + + /* The battery has changed its reporting units. */ sysfs_remove_battery(battery); sysfs_add_battery(battery); } -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
