On 02/20/2015 05:53 PM, Guenter Roeck wrote:

On Fri, Feb 20, 2015 at 04:07:35PM +0100, Cédric Le Goater wrote:

You should explain here why this patch is needed.

Yes. What it does is to check that the firmware exposes the service
this driver is using (OPAL_SENSOR_READ). I will fix it.

Thanks,

C. 

quoted

Signed-off-by: Cédric Le Goater <redacted>
---
 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