fujitu-laptop: fix tests of acpi_evaluate_integer() return value

Fix tests on return value from acpi_evaluate_integer().  Based on a patch by
Roel Kluin <roel.kluin@gmail.com> and incorporating suggestions from Len
Brown <lenb@kernel.org>.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index bcd4ba8..3c2d038 100644 (file)
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -376,8 +376,8 @@ static int get_lcd_level(void)
 
        status =
            acpi_evaluate_integer(fujitsu->acpi_handle, "GBLL", NULL, &state);
-       if (status < 0)
-               return status;
+       if (ACPI_FAILURE(status))
+               return 0;
 
        fujitsu->brightness_level = state & 0x0fffffff;
 
@@ -398,8 +398,8 @@ static int get_max_brightness(void)
 
        status =
            acpi_evaluate_integer(fujitsu->acpi_handle, "RBLL", NULL, &state);
-       if (status < 0)
-               return status;
+       if (ACPI_FAILURE(status))
+               return -1;
 
        fujitsu->max_brightness = state;