linux-kernel - Re: [PATCH v4] i8k: Autodetect maximal fan speed and fan RPM multiplier

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Message-Id: <201412211940.06980@pali>
Date:	Sun, 21 Dec 2014 19:40:06 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Arnd Bergmann <arnd@...db.de>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, Valdis.Kletnieks@...edu,
	Steven Honeyman <stevenhoneyman@...il.com>,
	Jean Delvare <jdelvare@...e.de>,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Jochen Eisinger <jochen@...guin-breeder.org>
Subject: Re: [PATCH v4] i8k: Autodetect maximal fan speed and fan RPM multiplier

On Sunday 21 December 2014 19:27:34 Guenter Roeck wrote:
> On 12/21/2014 09:23 AM, Pali Rohár wrote:
> > This patch adds new function i8k_get_fan_nominal_speed() for
> > doing SMM call which will return nominal fan RPM for
> > specified fan speed. It returns nominal RPM value at which
> > fan operate when speed (0, 1, 2, 3) is set. It looks like
> > RPM value is not accurate, but still provides very useful
> > information.
> > 
> > First it can be used to validate if certain fan speed could
> > be accepted by SMM for setting fan speed and we can use
> > this routine to detect maximal fan speed.
> > 
> > Second it returns RPM value, so we can check if value looks
> > correct with multiplier 30 or multiplier 1 (until now only
> > these two multiplier were used). If RPM value with
> > multiplier 30 is too high, then multiplier 1 is used.
> > 
> > In case when SMM reports that new function is not supported
> > we will fallback to old hardcoded values. Maximal fan speed
> > would be 2 and RPM multiplier 30.
> > 
> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> > Tested-by: Pali Rohár <pali.rohar@...il.com>
> 
> Tested-by the submitter is kind of implied.
> 
> Anyway, this patch does not apply to 3.19-rc1, nor to 3.18.
> What is your baseline ? Can you rebase to 3.19-rc1 ?
> Or do I need to apply some other patch first ?
> 
> Thanks,
> Guenter

You need to apply these old patches:
i8k: Add support for temperature sensor labels
i8k: Register only temperature sensors which have labels
i8k: Return -ENODATA for invalid temperature
i8k: Rework error retries

(they are not in 3.18/3.19 yet, but you already reviewed them)

And after that you need to apply new pach which I sent hour ago:
[PATCH] i8k: Make fan module parameters an unsigned

-- 
Pali Rohár
pali.rohar@...il.com

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