On Mon, May 12, 2025 at 09:35:47AM +0200, Thomas Weißschuh wrote:
> On 2025-05-12 15:11:57+0800, Sung-Chi Li via B4 Relay wrote:
> > + if (!IS_ENABLED(CONFIG_THERMAL))
> > + return;
> > +
> > + if (!priv->fan_control_supported)
> > + return;
> > +
> > + for (i = 0; i < EC_FAN_SPEED_ENTRIES; i++) {
> > + if (!(priv->usable_fans & BIT(i)))
> > + continue;
> > +
> > + cpriv = devm_kzalloc(dev, sizeof(*cpriv), GFP_KERNEL);
> > + if (!cpriv)
> > + return;
>
> The failures are swallowed silently. They should be propagated.
>
After rethinking about the logic, I think I should try and register all fans
with best effort, so I should not return immediately; instead, I will log an
warning log, and continue with the next fan.
> > +
> > + type = devm_kasprintf(dev, GFP_KERNEL, "%s-fan%zu", dev_name(dev), i);
> > + if (!type)
> > + return;
> > +
> > + cpriv->hwmon_priv = priv;
> > + cpriv->index = i;
> > + cdev = devm_thermal_of_cooling_device_register(dev, NULL, type, cpriv,
> > + &cros_ec_thermal_cooling_ops);
> > + if (!cdev)
>
> ..._cooling_device_register() returns an error pointer on failure, not NULL.
>
Thank you, will use IS_ERR for checking and %pe to print error.
> > + return;
> > + }
> > +}
> > +
> > static int cros_ec_hwmon_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > @@ -412,6 +489,7 @@ static int cros_ec_hwmon_probe(struct platform_device *pdev)
> > cros_ec_hwmon_probe_temp_sensors(dev, priv, thermal_version);
> > cros_ec_hwmon_probe_fans(priv);
> > priv->fan_control_supported = cros_ec_hwmon_probe_fan_control_supported(priv->cros_ec);
> > + cros_ec_hwmon_register_fan_cooling_devices(dev, priv);
> >
> > hwmon_dev = devm_hwmon_device_register_with_info(dev, "cros_ec", priv,
> > &cros_ec_hwmon_chip_info, NULL);
> >
> > --
> > 2.49.0.1015.ga840276032-goog
> >
> >
