linux-kernel - Re: intel_soc_dts_thermal binding issues

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Message-ID: <CA+5PVA58q==ieDyfoMEsJ=TxLXXRdNPoKC5gNWAg0MdTv4Eq+g@mail.gmail.com>
Date:	Thu, 5 Mar 2015 09:29:33 -0500
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	"Zhang, Rui" <rui.zhang@...el.com>
Cc:	Eduardo Valentin <edubezval@...il.com>,
	Linux PM list <linux-pm@...r.kernel.org>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: intel_soc_dts_thermal binding issues

On Wed, Mar 4, 2015 at 8:55 PM, Zhang, Rui <rui.zhang@...el.com> wrote:
> What kernel are you using?
> I think it should be fixed by commit 014d9d5d0cc1da79bbe48fbc5e1068c5616238d2, which is merged in 3.19-rc5.

The reporter with the ASUS machine was running 3.18.7.  However, on my
NUC machine I still see this with 4.0-rc2 and the latest Linus tree:

[jwboyer@...-celeron ~]$ uname -a
Linux nuc-celeron 4.0.0-0.rc2.git1.1.fc23.x86_64 #1 SMP Thu Mar 5
08:37:23 EST 2015 x86_64 x86_64 x86_64 GNU/Linux
[jwboyer@...-celeron ~]$ dmesg | grep request_threaded
[   11.187239] intel_soc_dts_thermal: request_threaded_irq ret -22
[   11.261738] intel_soc_dts_thermal: request_threaded_irq ret -22
[jwboyer@...-celeron ~]$ cat /proc/cpuinfo | grep "model name"
model name    : Intel(R) Celeron(R) CPU  N2820  @ 2.13GHz
model name    : Intel(R) Celeron(R) CPU  N2820  @ 2.13GHz
[jwboyer@...-celeron ~]$

The 4.0.0-rc2.git1.1 above corresponds to Linux
v4.0-rc2-150-g6587457b4b3d in mainline.  We aren't carrying any
patches that would impact this.

The commit you pointed to seems to imply that either INT340X_THERMAL
or INTEL_SOC_DTS_THERMAL could be set, but not both.  In Fedora, we
have them both enabled as modules:

[jwboyer@...-celeron ~]$ grep _THERMAL=m
/boot/config-4.0.0-0.rc2.git1.1.fc23.x86_64
CONFIG_X86_PKG_TEMP_THERMAL=m
CONFIG_INTEL_SOC_DTS_THERMAL=m
CONFIG_INT340X_THERMAL=m
[jwboyer@...-celeron ~]$

Maybe the commit should be checking for INTEL_SOC_DTS_THERMAL
unconditionally, and not as an #elfi?

josh

>
> Thanks,
> rui
>
> -----Original Message-----
> From: jwboyer@...il.com [mailto:jwboyer@...il.com] On Behalf Of Josh Boyer
> Sent: Wednesday, March 4, 2015 10:05 PM
> To: Zhang, Rui; Eduardo Valentin
> Cc: Linux PM list; Linux-Kernel@...r. Kernel. Org
> Subject: intel_soc_dts_thermal binding issues
> Importance: High
>
> Hi All,
>
> We've seen a number of reports where people see:
>
> [   20.499427] intel_soc_dts_thermal: request_threaded_irq ret -22
> [   20.519160] intel_soc_dts_thermal: request_threaded_irq ret -22
> [   20.532660] intel_soc_dts_thermal: request_threaded_irq ret -22
>
> in their boot logs.  They view this as a kernel bug and report is as such.  The above log came from an ASUS x200ma machine, which has a quad core Baytrail-M Pentium CPU (N3530).
>
> I can't tell if the issue is because the driver is trying to bind to all 4 cores and only CPU0 works, or what other issue would cause this.
> I personally have a Celeron based NUC with a N2820 that gets the error above for both cores and the driver doesn't load at all.
>
> Is there something else the driver should be doing to bind to the various CPUs?  If there's nothing else it can key off of, can we drop the pr_err so it stops showing up in dmesg?
>
> josh
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