[RFC PATCH 1/3] powerpc/powernv: Check OPAL sensor calls exist

["Cédric Le Goater" <clg@fr.ibm.com>]

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
---
 arch/powerpc/platforms/powernv/opal-sensor.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-sensor.c b/arch/powerpc/platforms/powernv/opal-sensor.c
index 4ab67ef7abc9..544292f2020f 100644
--- a/arch/powerpc/platforms/powernv/opal-sensor.c
+++ b/arch/powerpc/platforms/powernv/opal-sensor.c
@@ -72,6 +72,9 @@ static __init int opal_sensor_init(void)
 	struct platform_device *pdev;
 	struct device_node *sensor;
 
+	if (!opal_check_token(OPAL_SENSOR_READ))
+		return -ENODEV;
+
 	sensor = of_find_node_by_path("/ibm,opal/sensors");
 	if (!sensor) {
 		pr_err("Opal node 'sensors' not found\n");
-- 
1.7.10.4