linux-kernel - Re: [PATCH 00/14] Common Dell SMBIOS API

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Date:	Thu, 14 Jan 2016 14:43:31 -0800
From:	Darren Hart <dvhart@...radead.org>
To:	Michał Kępień <kernel@...pniu.pl>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Pali Rohár <pali.rohar@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Alex Hung <alex.hung@...onical.com>,
	platform-driver-x86@...r.kernel.org, linux-leds@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/14] Common Dell SMBIOS API

On Tue, Jan 12, 2016 at 03:02:46PM +0100, Michał Kępień wrote:
> The Linux kernel tree currently contains two Dell laptop-related drivers
> issuing SMBIOS requests in different ways (dell-laptop in
> drivers/platform/x86 and dell-led in drivers/led).  As an upcoming patch
> series for the dell-wmi driver (also in drivers/platform/x86) will
> change it so that it also performs SMBIOS requests, I took the
> opportunity to unify the API used for issuing Dell SMBIOS requests
> throughout the kernel before any further code duplication happens.
> Credit for suggesting this goes to Pali Rohár.
> 
> This patch series is primarily intended for the platform-x86 subsystem,
> with only 2 final patches touching the LED subsystem.  I decided to send
> the whole series to everyone involved to provide context - my apologies
> if this is frowned upon.

I much prefer it, thank you.

> 
> As for making dell-led dependent on a driver in drivers/platform/x86,
> let me just hint that Pali and I think it could be possible to
> eventually move all of dell-led's code to drivers/platform/x86.  But
> first things first.
> 
> The first patch generates a lot of checkpatch warnings, but these are
> also raised for the original code and I decided that not changing the
> code while moving around large quantities of it is critical for
> reviewability.

Noted, thanks.

> 
> Alex, as I don't have the hardware to test the changes in dell-led
> (beyond compilation) and you contributed the parts of it which this
> patch series changes, is there any way you might test it on relevant
> hardware?

OK, before I dive into a review on this, I'm going to be looking for an ack from
Pali and some Tested-by from the usual suspects. We're already into the merge
window and this series needs to spend some time in next. We'll plan on getting
this into next after the merge window closes and have it land in 4.6. Hopefully
that will allow us to work through Andy's wmi rearchitecting at the same time
and catch any incompatibilities without introducing undue churn to mainline.

> 
>  drivers/leds/Kconfig               |    1 +
>  drivers/leds/dell-led.c            |  125 ++--------
>  drivers/platform/x86/Kconfig       |   12 +-
>  drivers/platform/x86/Makefile      |    1 +
>  drivers/platform/x86/dell-laptop.c |  444 ++++++++++++------------------------
>  drivers/platform/x86/dell-smbios.c |  179 +++++++++++++++
>  drivers/platform/x86/dell-smbios.h |   48 ++++
>  7 files changed, 395 insertions(+), 415 deletions(-)

My favorite kind of patch              ^ :-)

Thanks!

>  create mode 100644 drivers/platform/x86/dell-smbios.c
>  create mode 100644 drivers/platform/x86/dell-smbios.h
> 
> -- 
> 1.7.10.4
> 
> 

-- 
Darren Hart
Intel Open Source Technology Center