fbdev: unicore32: 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>
Tested-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>

diff --git a/drivers/video/fb-puv3.c b/drivers/video/fb-puv3.c
index 27f2c57e06e9f0225f8132f5a93ce7022ba81183..60a787fa32cfe97ddc8cdbb2999492e4da99144d 100644 (file)
--- a/drivers/video/fb-puv3.c
+++ b/drivers/video/fb-puv3.c
@@ -624,8 +624,8 @@ static int unifb_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;