gxt4500: 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: Paul Mackerras <paulus@samba.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/video/gxt4500.c b/drivers/video/gxt4500.c
index 896e53dea906178a30f951e4460b76b462c51b66..0fad23f810a32035faffd0fcd7e0256426947b58 100644 (file)
--- a/drivers/video/gxt4500.c
+++ b/drivers/video/gxt4500.c
@@ -543,8 +543,8 @@ static int gxt4500_pan_display(struct fb_var_screeninfo *var,
 
        if (var->xoffset & 7)
                return -EINVAL;
-       if (var->xoffset + var->xres > var->xres_virtual ||
-           var->yoffset + var->yres > var->yres_virtual)
+       if (var->xoffset + info->var.xres > info->var.xres_virtual ||
+           var->yoffset + info->var.yres > info->var.yres_virtual)
                return -EINVAL;
 
        writereg(par, REFRESH_START, (var->xoffset << 16) | var->yoffset);