hgafb: 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.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
Cc: Brent Cook <busterb@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/video/hgafb.c b/drivers/video/hgafb.c
index 4052718eefaa09215a8706501eb9e6e47a339857..4394389caf68d8e8ffa40c5d19e2eec3970d76eb 100644 (file)
--- a/drivers/video/hgafb.c
+++ b/drivers/video/hgafb.c
@@ -422,8 +422,8 @@ static int hgafb_pan_display(struct fb_var_screeninfo *var,
                    var->xoffset)
                        return -EINVAL;
        } else {
-               if (var->xoffset + var->xres > info->var.xres_virtual
-                || var->yoffset + var->yres > info->var.yres_virtual
+               if (var->xoffset + info->var.xres > info->var.xres_virtual
+                || var->yoffset + info->var.yres > info->var.yres_virtual
                 || var->yoffset % 8)
                        return -EINVAL;
        }