i8k: Register only temperature sensors which have labels

Detect presense of sensor by calling type function instead trying to read
temperature value. Type function is working also for sensors which are temporary
turned off (e.g on GPU which is turned off). Dell DOS binary NBSVC.MDM is doing
similar checks, so we should do that too.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 663868b2adc4457b2cb6bcac383f93c001f5be3a..afcc9fe084dc986a7d2d6ee8786fe98973f892ac 100644 (file)
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -660,19 +660,19 @@ static int __init i8k_init_hwmon(void)
 
        i8k_hwmon_flags = 0;
 
-       /* CPU temperature attributes, if temperature reading is OK */
-       err = i8k_get_temp(0);
-       if (err >= 0 || err == -ERANGE)
+       /* CPU temperature attributes, if temperature type is OK */
+       err = i8k_get_temp_type(0);
+       if (err >= 0)
                i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1;
        /* check for additional temperature sensors */
-       err = i8k_get_temp(1);
-       if (err >= 0 || err == -ERANGE)
+       err = i8k_get_temp_type(1);
+       if (err >= 0)
                i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2;
-       err = i8k_get_temp(2);
-       if (err >= 0 || err == -ERANGE)
+       err = i8k_get_temp_type(2);
+       if (err >= 0)
                i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3;
-       err = i8k_get_temp(3);
-       if (err >= 0 || err == -ERANGE)
+       err = i8k_get_temp_type(3);
+       if (err >= 0)
                i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4;
 
        /* Left fan attributes, if left fan is present */