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Message-ID: <CAJZ5v0guh4MGJpaCoh3Guc8BL_37=KHWW10wvK+iD6jZLvZWwg@mail.gmail.com>
Date: Fri, 9 May 2025 20:23:16 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: zhangzihuan <zhangzihuan@...inos.cn>
Cc: rafael@...nel.org, lenb@...nel.org, linux-acpi@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] ACPI: battery: Reduce unnecessary calls to acpi_battery_update()
On Tue, Apr 22, 2025 at 11:11 AM zhangzihuan <zhangzihuan@...inos.cn> wrote:
>
> When entering the acpi_mattery_notify function, no matter what the event
> is, acpi_mattery_update will definitely be called.
I think you mean acpi_battery_update().
> Use the acpi_listen command to listen, sometimes the log looks like this:
>
> battery xxx:00 00000081 00000001
> battery xxx:00 00000000 00000001
> battery xxx:00 00000080 00000001
>
> Firmware manufacturers will customize some events like 0x0, so
> non-matching events will be ignored.
I don't quite get what you are trying to achieve here.
> Signed-off-by: zhangzihuan <zhangzihuan@...inos.cn>
> ---
> drivers/acpi/battery.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
> index 6760330a8af5..9446c57b77e7 100644
> --- a/drivers/acpi/battery.c
> +++ b/drivers/acpi/battery.c
> @@ -1083,7 +1083,8 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
> msleep(battery_notification_delay_ms);
> if (event == ACPI_BATTERY_NOTIFY_INFO)
> acpi_battery_refresh(battery);
> - acpi_battery_update(battery, false);
> + if (event == ACPI_BATTERY_NOTIFY_STATUS)
> + acpi_battery_update(battery, false);
So only call acpi_battery_update() for ACPI_BATTERY_NOTIFY_STATUS.
Why do you think this is the only case in which acpi_battery_update()
needs to be called?
> acpi_bus_generate_netlink_event(device->pnp.device_class,
> dev_name(&device->dev), event,
> acpi_battery_present(battery));
> --
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