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>

diff --git a/drivers/video/hgafb.c b/drivers/video/hgafb.c
index 4052718..4394389 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;
        }