Re: [PATCH 3/3] ACPI: battery: register power_supply subdevice even when battery not present

[Maxim Levitsky <maximlevitsky@gmail.com>]

On Tue, 2009-05-12 at 15:51 +0100, Alan Jenkins wrote:
> Keeping this device around lets userspace know that we have a battery
> bay, even if there is nothing in it at the moment.  This is what every
> other battery driver does, so ACPI should do it as well.
> 
> There is no reason to preserve the old behaviour.  We now correctly
> provide the "present" attribute, which will return "0" when the battery
> is removed.  HAL was already trying to check this attribute, so
> it should be fine.
> 
> Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>

What happened to this patch?

I still get the issue this patch attempts to fix:

maxim@maxim-laptop:~/software/kernel/linux-2.6$
ls /sys/class/power_supply/
AC
maxim@maxim-laptop:~/software/kernel/linux-2.6$
ls /sys/class/power_supply/
AC  BAT0
maxim@maxim-laptop:~/software/kernel/linux-2.6$
ls /sys/class/power_supply/
AC
maxim@maxim-laptop:~/software/kernel/linux-2.6$ uname -r
2.6.31-rc8-next-20090904-next
maxim@maxim-laptop:~/software/kernel/linux-2.6$ 


When I unplug the battery, its sysfs entry disappears.
Thus if system was booted without battery, there will be no way to know
system has one.

This patch doesn't apply.

Best regards,
	Maxim Levitsky