linux-kernel - Re: [PATCH 0/6] dell-smm-hwmon fixes

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Message-Id: <201606190039.47640@pali>
Date:	Sun, 19 Jun 2016 00:39:47 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Jean Delvare <jdelvare@...e.com>,
	Jan C Peters <jcpeters89@...il.com>,
	Thorsten Leemhuis <fedora@...mhuis.info>,
	David Santamaría Rogado <howl.nsp@...il.com>,
	Peter Saunderson <peteasa@...il.com>,
	Tolga Cakir <cevelnet@...il.com>,
	"Austin S. Hemmelgarn" <ahferroin7@...il.com>,
	Mario_Limonciello@...l.com,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Michał Kępień <kernel@...pniu.pl>,
	Dakota Whipple <dakotajaywhipple@...il.com>,
	Leon Yu <leon@...nyu.net>, linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] dell-smm-hwmon fixes

On Saturday 18 June 2016 18:54:58 Guenter Roeck wrote:
> On 06/18/2016 08:26 AM, Pali Rohár wrote:
> > On Saturday 18 June 2016 17:13:59 Guenter Roeck wrote:
> >> On 06/17/2016 03:54 PM, Pali Rohár wrote:
> >>> I'm sending all my dell-smm-hwmon patches in one series, because
> >>> due to changes in code other patches depends on previous.
> >>> 
> >>> First two patches fixes problem with old /proc/i8k file. Second
> >>> is security fix and should be backported to all stable kernels
> >>> (that problem was there always). I tested i8kctl tool (from
> >>> i8kutils package) that it still works with these patches.
> >>> Without root access for those security operations just showes
> >>> '?' or '-1'.
> >>> 
> >>> Third and fourth patches try to fix problem on machines with
> >>> broken SMM/BIOS when calling function fan_type().
> >>> 
> >>> Fifth is new feature and last sixth useful for debugging.
> >>> 
> >>> Pali Rohár (6):
> >>>     hwmon: (dell-smm) Fail in ioctl I8K_BIOS_VERSION when bios
> >>>     version is
> >>>     
> >>>       not a number
> >>>     
> >>>     hwmon: (dell-smm) Restrict fan control and serial number to
> >>>     
> >>>       CAP_SYS_ADMIN by default
> >>>     
> >>>     hwmon: (dell-smm) Disallow fan_type() calls on broken
> >>>     machines hwmon: (dell-smm) Cache fan_type() calls and change
> >>>     fan detection hwmon: (dell-smm) Detect fan with index=2
> >>>     hwmon: (dell-smm) In debug mode log duration of SMM calls
> >>>    
> >>>    drivers/hwmon/dell-smm-hwmon.c |  122
> >>>    ++++++++++++++++++++++++++++++++-------- 1 file changed, 99
> >>>    insertions(+), 23 deletions(-)
> >> 
> >> Pali,
> >> 
> >> You asked for additional testing, so I am not sure what you expect
> >> me to do.
> >> 
> >> Which of the patches can/should I apply now ?
> >> 
> >> Guenter
> > 
> > Test 3/6 and 4/6 patches on affected Dell machines. I CCed all
> > people who tried to debug those bugs, so need confirmation from
> > them that after applying 3/6 and 4/6 patches, erratic fan
> > behaviour is not there...
> > 
> > But because those two patches depends on previous, it is needed to
> > test whole series...
> 
> This doesn't tell me which patches to apply now. The first two ?

Yes, 1/6 and 2/6 are OK.

-- 
Pali Rohár
pali.rohar@...il.com

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