[PATCH] Rewritten backlight infrastructure for portable Apple computers

[safe/jmp/linux-2.6] / arch / powerpc / kernel / traps.c

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 91a6e04..52f5659 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -32,6 +32,7 @@
 #include <linux/delay.h>
 #include <linux/kprobes.h>
 #include <linux/kexec.h>
+#include <linux/backlight.h>
 
 #include <asm/kdebug.h>
 #include <asm/pgtable.h>
@@ -105,10 +106,18 @@ int die(const char *str, struct pt_regs *regs, long err)
        spin_lock_irq(&die_lock);
        bust_spinlocks(1);
 #ifdef CONFIG_PMAC_BACKLIGHT
-       if (machine_is(powermac)) {
-               set_backlight_enable(1);
-               set_backlight_level(BACKLIGHT_MAX);
+       mutex_lock(&pmac_backlight_mutex);
+       if (machine_is(powermac) && pmac_backlight) {
+               struct backlight_properties *props;
+
+               down(&pmac_backlight->sem);
+               props = pmac_backlight->props;
+               props->brightness = props->max_brightness;
+               props->power = FB_BLANK_UNBLANK;
+               props->update_status(pmac_backlight);
+               up(&pmac_backlight->sem);
        }
+       mutex_unlock(&pmac_backlight_mutex);
 #endif
        printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter);
 #ifdef CONFIG_PREEMPT