RE: [STABLE REGRESSION] iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3

[Song, Hongyan]

Hi All,
	Sorry for the late response, for I am on Qingming Festival for the last 3 days.
I noticed Ritesh has tried a USB sensor, I do not have that kind of sensor at hand and have not tried it yet. My patch worked well for ISH but I am not sure whether it is fine for USB sensor. Sorry for not much information can provide. I will try to see if I can find one device and try.



BR
Song Hongyan

-----Original Message-----
From: Srinivas Pandruvada [mailto:srinivas.pandruvada@xxxxxxxxxxxxxxx]
Sent: Wednesday, April 5, 2017 8:45 AM
To: rrs@xxxxxxxxxxxxxx; Song, Hongyan <hongyan.song@xxxxxxxxx>; linux-iio <linux-iio@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: [STABLE REGRESSION] iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3

Hi Ritesh,

Does the attached patch helps?

Thanks,
Srinivas

On Tue, 2017-04-04 at 00:44 +0530, Ritesh Raj Sarraf wrote:
> Adding Stable, LKML and IIO MLs.
> 
> Hello Hongyan,
> 
> Do you have any feedback ? With the bisected commit reverted, I've 
> been successfully running the machine without any issues.
> 
> Ritesh
> 
> 
> On Sat, 2017-04-01 at 08:14 -0700, Srinivas Pandruvada wrote:
> > Hello Hongyan,
> > 
> > Can you check the findings of Ritesh?
> > 
> > Thanks,
> > Srinivas
> > 
> > On Sat, 2017-04-01 at 14:07 +0530, Ritesh Raj Sarraf wrote:
> > > Hello Srinivas,
> > > 
> > > With the Linux 4.10.7 release, I have encountered a regression 
> > > introduced on my Lenovo Yoga 2 13, for the ITE Rotation Sensor.
> > > 
> > > 
> > > rrs@learner:~$ lsusb
> > > Bus 001 Device 002: ID 8087:8000 Intel Corp. Bus 001 Device 001: 
> > > ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID
> > > 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 006: ID
> > > 048d:8350 Integrated Technology Express, Inc.
> > > Bus 002 Device 005: ID 0bda:b728 Realtek Semiconductor Corp. Bus
> > > 002 Device 004: ID 04f2:b40f Chicony Electronics Co., Ltd Bus 002 
> > > Device 003: ID 04f3:0303 Elan Microelectronics Corp.
> > > Bus 002 Device 002: ID 0bda:0129 Realtek Semiconductor Corp.
> > > RTS5129
> > > Card Reader
> > > Controller
> > > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> > > 2017-04-01 / 14:04:49 âââÂÂâ
> > > 
> > > 
> > > The ITE sensors do not feed any data on the 4.10.7 kernel.
> > > Reverting
> > > back to
> > > 4.10.5, everything works back.
> > > 
> > > 
> > > After a git bisect, the culprit reported is:
> > > 
> > > Bisecting: 0 revisions left to test after this (roughly 0 steps) 
> > > [6c2aab07d12436af1cd8d9ac1d117a442cc91eec] iio: hid-sensor-
> > > trigger:
> > > Change get
> > > poll value function order to avoid sensor properties losing after 
> > > resume from S3
> > > 1
> > > 
> > > Can you please review my findings to confirm that it really is a 
> > > regression bug ?
> > > 
> > > 
> > > Thanks,
> > > Ritesh
> > >