ACPI: thinkpad-acpi: map ENXIO to EINVAL for fan sysfs

Currently, all fan control operations return ENXIO if unsupported
operations are requested, but return EINVAL if invalid fan modes are
requested on a given ThinkPad.

This is not strictly correct for sysfs, so map ENXIO to EINVAL in the sysfs
attribute store handlers, as we do benefit from the ENXIO in other parts of
the driver code.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index b85f0960e608..7aed118ca82b 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -2824,7 +2824,9 @@ static ssize_t fan_pwm1_enable_store(struct device *dev,
         }
 
         res = fan_set_level_safe(level);
-        if (res < 0)
+        if (res == -ENXIO)
+                return -EINVAL;
+        else if (res < 0)
                 return res;
 
         fan_watchdog_reset();
@@ -2888,7 +2890,9 @@ static ssize_t fan_pwm1_store(struct device *dev,
         if (!rc && (status &
                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
                 rc = fan_set_level(newlevel);
-                if (!rc) {
+                if (rc == -ENXIO)
+                        rc = -EINVAL;
+                else if (!rc) {
                         fan_update_desired_level(newlevel);
                         fan_watchdog_reset();
                 }