linux-kernel - Re: [PATCH v2] leds: add new lp8788 led driver

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Message-ID: <CAK5ve-Lyk_EjOjSKHF-j0J1_8oey8wWKkVXAdqbKpRX2eZY+hg@mail.gmail.com>
Date:	Wed, 25 Jul 2012 12:46:56 +0800
From:	Bryan Wu <bryan.wu@...onical.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	shuahkhan@...il.com, "Kim, Milo" <Milo.Kim@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] leds: add new lp8788 led driver

On Tue, Jul 24, 2012 at 8:55 PM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:
> On Tue, Jul 24, 2012 at 08:23:00AM +0800, Bryan Wu wrote:
>> On Mon, Jul 23, 2012 at 2:19 AM, Mark Brown
>
>> > If the work is flushed then the state that userspace thought was set
>> > when the driver is removed will actually be set before the driver is
>> > removed.  This is fairly minor but might be useful.
>
>> So what's kind of state you mentioned here that is cared by user
>> space. I find these 2 functions are quite confused for use right now.
>
> Any state - none of the drivers with sleeping I/O can do anything
> directly in their callbacks so they defer everything to work (we really
> should have that in the core but it was too annoying to implement last
> time I looked).
>
>> Literally, canceling normally will remove pending work item and wait
>> for running work item to finish. flushing will wait for both pending
>> and running work item to finish.
>
> Right, so if we flush it means we know that any scheduled work actually
> ran and implemented whatever change was requested.

Thanks Mark for clarifying this.

I'm going to Ack this driver and Mark will you merge this as whole patchset?

Acked-by: Bryan Wu <bryan.wu@...onical.com>

Thanks,
-Bryan
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