platform/x86: fujitsu-laptop: rework logolamp_set() to properly handle errors

Potential errors returned by some call_fext_func() calls inside
logolamp_set() are currently ignored.  Rework logolamp_set() to properly
handle them.  This causes one more call_fext_func() call to be made in
the LED_OFF case, though one could argue that this is logically the
right thing to do (even though the extra call is not needed to shut the
LED off).

Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Acked-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index b725a90..34b8481 100644 (file)
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -271,15 +271,20 @@ static int call_fext_func(int cmd, int arg0, int arg1, int arg2)
 static int logolamp_set(struct led_classdev *cdev,
                               enum led_brightness brightness)
 {
-       if (brightness >= LED_FULL) {
-               call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_ON);
-               return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, FUNC_LED_ON);
-       } else if (brightness >= LED_HALF) {
-               call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_ON);
-               return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, FUNC_LED_OFF);
-       } else {
-               return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, FUNC_LED_OFF);
-       }
+       int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
+       int ret;
+
+       if (brightness < LED_HALF)
+               poweron = FUNC_LED_OFF;
+
+       if (brightness < LED_FULL)
+               always = FUNC_LED_OFF;
+
+       ret = call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
+       if (ret < 0)
+               return ret;
+
+       return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 }
 
 static int kblamps_set(struct led_classdev *cdev,