welcome to signed/unsigned hell...

Index: backlight.c
===================================================================
--- backlight.c (revision 60)
+++ backlight.c (working copy)
@@ -54,8 +54,8 @@
        OUTREG(0x7af8, 0x00000001 | ((unsigned int)value << 8));
 }
 
-void write_backlight(unsigned char value) {
-       unsigned int current = read_backlight();
+void write_backlight(int value) {
+       int current = read_backlight();
 
        if (current < value) {
                while (current < value) {

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