[media] ivtvfb: use display information in info not in var for panning

We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it. Also use the
aligned fix.line_length and not the (possible) unaligned xres_virtual.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/ivtv/ivtvfb.c b/drivers/media/video/ivtv/ivtvfb.c
index 17247451c69326f3159cb6913e7eabaa152d72fc..2d5a97431c0a30fd238f6dd3f0eeab9be0670f1f 100644 (file)
--- a/drivers/media/video/ivtv/ivtvfb.c
+++ b/drivers/media/video/ivtv/ivtvfb.c
@@ -836,7 +836,8 @@ static int ivtvfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *inf
        u32 osd_pan_index;
        struct ivtv *itv = (struct ivtv *) info->par;
 
-       osd_pan_index = (var->xoffset + (var->yoffset * var->xres_virtual))*var->bits_per_pixel/8;
+       osd_pan_index = var->yoffset * info->fix.line_length
+                     + var->xoffset * info->var.bits_per_pixel / 8;
        write_reg(osd_pan_index, 0x02A0C);
 
        /* Pass this info back the yuv handler */