Re: [PATCH V5 3/3] hwmon: pwm-fan: Add RPM support via external interrupt

[Robin Murphy <robin.murphy@xxxxxxx>]

On 12/04/2019 14:50, Guenter Roeck wrote:
> On 4/12/19 4:50 AM, Robin Murphy wrote:
> > On 12/04/2019 12:07, Stefan Wahren wrote:
> > > On 11.04.19 18:57, Guenter Roeck wrote:
> > > > On Thu, Apr 11, 2019 at 03:30:11PM +0200, Stefan Wahren wrote:
> > > > > -ATTRIBUTE_GROUPS(pwm_fan);
> > > > > +static umode_t pwm_fan_attrs_visible(struct kobject *kobj, struct 
> > > > > attribute *a,
> > > > > +                     int n)
> > > > > +{
> > > > > +    struct device *dev = container_of(kobj, struct device, kobj);
> > > > > +    struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);
> > > > > +    struct device_attribute *devattr;
> > > > > +
> > > > > +    /* Hide fan_input in case no interrupt is available  */
> > > > > +    devattr = container_of(a, struct device_attribute, attr);
> > > > Field day for static analyzers - devattr is no longer used.
> > > > No need to resend. I'll let the series rest for a couple of days
> > > > and then apply to hwmon-next (after removing devattr) unless there are
> > > > additional comments.
> > > Thank you
> >
> > FWIW you can have a
> >
> > Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>
> >
> > for the whole series. The only minor comment that springs to mind
> > isn't actually specific to this patch, so is probably best made as
> > the follow-up below.
> >
> > Robin.
>
> Any chance you can send the patch below as separate patch ? I track patches
> using patchwork, and attachments don't show up there.

Sure, can do - would you like an explicit R-b on #1 and #2 here for 
patchwork to pick up as well?

Robin.

> Thanks,
> Guenter
>
> > ----->8-----
> > From: Robin Murphy <robin.murphy@xxxxxxx>
> > Subject: [PATCH] hwmon: pwm-fan: Report probe errors consistently
> >
> > Printing the error code for a failure provides a head-start for
> > debugging, since it's often sufficient to pinpoint the origin of the
> > failure. We already do this for some probe-failure messages, so let's
> > make the rest of them consistent.
> >
> > Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
> > ---
> >   drivers/hwmon/pwm-fan.c | 13 ++++++++-----
> >   1 file changed, 8 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
> > index 8c4c5eefd4ca..556db4bef743 100644
> > --- a/drivers/hwmon/pwm-fan.c
> > +++ b/drivers/hwmon/pwm-fan.c
> > @@ -330,7 +330,7 @@ static int pwm_fan_probe(struct platform_device 
> > *pdev)
> >
> >       ret = pwm_apply_state(ctx->pwm, &state);
> >       if (ret) {
> > -        dev_err(&pdev->dev, "Failed to configure PWM\n");
> > +        dev_err(&pdev->dev, "Failed to configure PWM: %d\n", ret);
> >           goto err_reg_disable;
> >       }
> >
> > @@ -348,7 +348,8 @@ static int pwm_fan_probe(struct platform_device 
> > *pdev)
> >           ret = devm_request_irq(&pdev->dev, ctx->irq, pulse_handler, 0,
> >                          pdev->name, ctx);
> >           if (ret) {
> > -            dev_err(&pdev->dev, "Can't get interrupt working.\n");
> > +            dev_err(&pdev->dev,
> > +                "Failed to request interrupt: %d\n", ret);
> >               goto err_pwm_disable;
> >           }
> >           ctx->sample_start = ktime_get();
> > @@ -358,8 +359,9 @@ static int pwm_fan_probe(struct platform_device 
> > *pdev)
> >       hwmon = devm_hwmon_device_register_with_groups(&pdev->dev, 
> > "pwmfan",
> >                                  ctx, pwm_fan_groups);
> >       if (IS_ERR(hwmon)) {
> > -        dev_err(&pdev->dev, "Failed to register hwmon device\n");
> >           ret = PTR_ERR(hwmon);
> > +        dev_err(&pdev->dev,
> > +            "Failed to register hwmon device: %d\n", ret);
> >           goto err_del_timer;
> >       }
> >
> > @@ -373,9 +375,10 @@ static int pwm_fan_probe(struct platform_device 
> > *pdev)
> >                                 "pwm-fan", ctx,
> >                                 &pwm_fan_cooling_ops);
> >           if (IS_ERR(cdev)) {
> > -            dev_err(&pdev->dev,
> > -                "Failed to register pwm-fan as cooling device");
> >               ret = PTR_ERR(cdev);
> > +            dev_err(&pdev->dev,
> > +                "Failed to register pwm-fan as cooling device: %d\n",
> > +                ret);
> >               goto err_del_timer;
> >           }
> >           ctx->cdev = cdev;