vfb: 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>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c
index bc67251f1a2f1d0e3662d4bec1f46f91bd2884d8..bf2f78065cf97d8d0bcdf492087244946783e99c 100644 (file)
--- a/drivers/video/vfb.c
+++ b/drivers/video/vfb.c
@@ -395,8 +395,8 @@ static int vfb_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)
                        return -EINVAL;
        }
        info->var.xoffset = var->xoffset;