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

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Date:	Thu, 23 Jun 2016 14:16:37 +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 Monday 20 June 2016 06:24:57 Guenter Roeck wrote:
> On 06/20/2016 02:12 AM, Pali Rohár wrote:
> >On Sunday 19 June 2016 00:39:47 Pali Rohár wrote:
> >>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.
> >>
> >
> >Guenter, now you can apply whole series + add all tested-by lines from
> >email threads. Looks like it is OK now.
> >
> First three patches applied and sent to Linus last night.
> 
> Remaining three patches applied to -next.

Ok, are you going to send at least patch 4/6 to Linus too as it fixes
next bug which should go to -stable too?

-- 
Pali Rohár
pali.rohar@...il.com