From: Pavel Machek <pavel@suse.cz>
To: Thomas Tuttle <thinkinginbinary@gmail.com>
Cc: kernel list <linux-kernel@vger.kernel.org>
Subject: Re: Problems porting asus_acpi to LED subsystem
Date: Tue, 4 Jul 2006 18:37:50 +0000 [thread overview]
Message-ID: <20060704183750.GD4420@ucw.cz> (raw)
In-Reply-To: <20060704145040.GA3611@phoenix>
On Tue 04-07-06 10:50:40, Thomas Tuttle wrote:
> On July 04 at 04:50 EDT, Pavel Machek hastily scribbled:
> > I _guess_ the LED subsystem can be called from interrupt, and ACPI
> > does not like that. So you probably need to use workqueue to defer
> > setting a bit.
>
> Ew, I would personally think that the LED subsystem should do this
> itself...
That would make LEDs factor 10000 or so slower on reasonable
platforms, sorry. But having flag 'this led needs process context'
might be god thing. Patch welcome.
> Anyway, can you give me a pointer on how to do this? I've never used
> workqueues before. (I've coded a grand total of about 40 lines of
> kernel code, and only about 20 work.)
grep is your friend, or some kernel programming intro.I do not have
any example near. Or maybe kernelnewbies.org.
--
Thanks for all the (sleeping) penguins.
next prev parent reply other threads:[~2006-07-07 13:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-03 20:39 Problems porting asus_acpi to LED subsystem Thomas Tuttle
2006-07-04 8:50 ` Pavel Machek
[not found] ` <20060704145040.GA3611@phoenix>
2006-07-04 18:37 ` Pavel Machek [this message]
2006-07-04 22:44 ` Pavel Machek
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