linux-kernel - Re: hp_accel: do not call ACPI from invalid context

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Message-ID: <20090113223300.GB7770@elf.ucw.cz>
Date:	Tue, 13 Jan 2009 23:33:00 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, eric.piel@...mplin-utc.net
Subject: Re: hp_accel: do not call ACPI from invalid context

On Tue 2009-01-13 14:11:16, Andrew Morton wrote:
> On Mon, 12 Jan 2009 11:31:55 +0100
> Pavel Machek <pavel@...e.cz> wrote:
> 
> > 
> > LED on HP notebooks is connected through ACPI. That unfortunately
> > means that it needs to be delayed by using schedule_work() to avoid
> > calling ACPI interpretter in invalid context. This patch fixes that.
> > 
> > Signed-off-by: Pavel Machek <pavel@...e.cz>


> > -static void hpled_set(struct led_classdev *led_cdev,
> > -			       enum led_brightness value)
> > -{
> > -	hpled_acpi_write(adev.device->handle, !!value);
> > -}
> > -
> > -static struct led_classdev hpled_led = {
> > -	.name			= "hp:red:hddprotection",
> > -	.default_trigger	= "heartbeat",
> 
> Current mainline+lis3lv02d-merge-with-leds-hp-disk.patch has "none"
> here, so the patch didn't apply.

Oops, sorry about that. I was hand-editing patches a bit too much :-(.

> > -	.brightness_set		= hpled_set,
> > +static struct delayed_led_classdev hpled_led = {
> > +	.led_classdev = {
> > +		.name			= "hp::hddprotect",
> > +		.default_trigger	= "none",
> 
> But I assume we wanted "none" here anyway, so that's what I'll do.

Thanks!
									Pavel

-- 
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