[PATCH] powermac backlight fixes

Fix a erroneous calculation of the legacy brightness values as reported by
Paul Collins.  Additionally, it moves the calculation of the negative value
in the radeonfb driver after the value check.

Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Paul Collins <paul@briny.ondioline.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/video/aty/radeon_backlight.c b/drivers/video/aty/radeon_backlight.c
index 7de66b855d4e..1755dddf1899 100644
--- a/drivers/video/aty/radeon_backlight.c
+++ b/drivers/video/aty/radeon_backlight.c
@@ -40,14 +40,14 @@ static int radeon_bl_get_level_brightness(struct radeon_bl_privdata *pdata,
 
         mutex_unlock(&info->bl_mutex);
 
-        if (pdata->negative)
-                rlevel = MAX_RADEON_LEVEL - rlevel;
-
         if (rlevel < 0)
                 rlevel = 0;
         else if (rlevel > MAX_RADEON_LEVEL)
                 rlevel = MAX_RADEON_LEVEL;
 
+        if (pdata->negative)
+                rlevel = MAX_RADEON_LEVEL - rlevel;
+
         return rlevel;
 }