fbdev: core: Fix ubsan warning in pixel_to_pat

It could be triggered on 32 bit big endian machines at 32 bpp in the
pattern realignment. In this case just return early as the result is
an identity.

Signed-off-by: Zsolt Kajtar <soci@c64.rulez.org>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/video/fbdev/core/fb_fillrect.h b/drivers/video/fbdev/core/fb_fillrect.h
index 66042e534de77168d044b7ba34cb72db6b1a1d12..f366670a53af824fb31770f194fa3290817a4a35 100644 (file)
--- a/drivers/video/fbdev/core/fb_fillrect.h
+++ b/drivers/video/fbdev/core/fb_fillrect.h
@@ -92,8 +92,7 @@ static unsigned long pixel_to_pat(int bpp, u32 color)
                pattern = pattern | pattern << bpp;
                break;
        default:
-               pattern = color;
-               break;
+               return color;
        }
 #ifndef __LITTLE_ENDIAN
        pattern <<= (BITS_PER_LONG % bpp);