When devm_thermal_zone_of_sensor_register() is called from hwmon_thermal_add_sensor() it is possible that the relevant sensor is missing an OF node. In this case thermal_zone_of_sensor_register() returns -EINVAL which causes hwmon_thermal_add_sensor() to fail as well. This patch changes relevant return code of thermal_zone_of_sensor_register() to -ENODEV, which is tolerated by hwmon_thermal_add_sensor().
Here is a particular case of such behaviour: the Marvell ethernet PHYs driver registers hwmon device for the built-in temperature sensor (see drivers/net/phy/marvell.c). Since the sensor doesn't have associated OF node devm_hwmon_device_register() returns error which ultimately causes failure of the PHY driver's probe function.
Fixes: 4e5e4705bf69 ("thermal: introduce device tree parser") Signed-off-by: Peter Mamonov pmamonov@gmail.com Reviewed-by: Andrew Lunn andrew@lunn.ch Cc: stable@vger.kernel.org --- drivers/thermal/of-thermal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c index dc5093be553e..34b0cc173f4a 100644 --- a/drivers/thermal/of-thermal.c +++ b/drivers/thermal/of-thermal.c @@ -493,7 +493,7 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
if (!dev || !dev->of_node) { of_node_put(np); - return ERR_PTR(-EINVAL); + return ERR_PTR(-ENODEV); }
sensor_np = of_node_get(dev->of_node);