Re: [PATCH v3] io: accel: kxcjk1013: restore the range after resume.

[Jonathan Cameron]

On Wed, 6 Mar 2019 09:43:24 +0100
Hans de Goede <hdegoede@xxxxxxxxxx> wrote:

> Hi,
> 
> On 06-03-19 03:32, Chen, Hu wrote:
> > From: "he, bo" <bo.he@xxxxxxxxx>
> > 
> > On some laptops, kxcjk1013 is powered off when system enters S3. We need
> > restore the range regiter during resume. Otherwise, the sensor doesn't
> > work properly after S3.
> > 
> > Signed-off-by: he, bo <bo.he@xxxxxxxxx>
> > Signed-off-by: Chen, Hu <hu1.chen@xxxxxxxxx>  
> 
> Thanks, patch looks good to me:
I'd have had an ever so slight preference for a goto as I prefer
errors to be checked for rather than good paths (as that's the more
common pattern), but I don't care strongly enough to ask for
a v4!

> 
> Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Applied to the fixes-togreg branch of iio.git and marked for stable.

Thanks,

Jonathan
> 
> Regards,
> 
> Hans
> 
> 
> 
> > ---
> >   v3: Avoid unnecessary mutex_unlock (Hans).
> >   v2: Handle return value independently (Jonathan).
> > 
> >   drivers/iio/accel/kxcjk-1013.c | 2 ++
> >   1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
> > index 7096e577b23f..50f3ff386bea 100644
> > --- a/drivers/iio/accel/kxcjk-1013.c
> > +++ b/drivers/iio/accel/kxcjk-1013.c
> > @@ -1437,6 +1437,8 @@ static int kxcjk1013_resume(struct device *dev)
> >   
> >   	mutex_lock(&data->mutex);
> >   	ret = kxcjk1013_set_mode(data, OPERATION);
> > +	if (ret == 0)
> > +		ret = kxcjk1013_set_range(data, data->range);
> >   	mutex_unlock(&data->mutex);
> >   
> >   	return ret;
> >