提交 0152b29c 编写于 作者: D Dmitry Torokhov 提交者: Jiri Kosina

HID: input: throttle battery uevents

The power_supply subsystem tends to emit uevent every time
power_supply_changed() is called, so we should call this API only when battery
strength reported by the device is actually different from the previous
readings, otherwise we'll drown the system in uevents.

Fixes: 581c4484 ("HID: input: map digitizer battery usage")
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
上级 09223865
......@@ -520,15 +520,21 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
static void hidinput_update_battery(struct hid_device *dev, int value)
{
int capacity;
if (!dev->battery)
return;
if (value == 0 || value < dev->battery_min || value > dev->battery_max)
return;
dev->battery_capacity = hidinput_scale_battery_capacity(dev, value);
dev->battery_reported = true;
power_supply_changed(dev->battery);
capacity = hidinput_scale_battery_capacity(dev, value);
if (!dev->battery_reported || capacity != dev->battery_capacity) {
dev->battery_capacity = capacity;
dev->battery_reported = true;
power_supply_changed(dev->battery);
}
}
#else /* !CONFIG_HID_BATTERY_STRENGTH */
static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
......
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