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acornfb: 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>
This commit is contained in:
Laurent Pinchart 2011-06-14 09:24:41 +00:00 committed by Paul Mundt
parent 1fdb518f9f
commit 1dbe8514fd
1 changed files with 2 additions and 2 deletions
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4
drivers/video/acornfb.c
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@ -850,9 +850,9 @@ acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
u_int y_bottom = var->yoffset;
if (!(var->vmode & FB_VMODE_YWRAP))
y_bottom += var->yres;
y_bottom += info->var.yres;
if (y_bottom > var->yres_virtual)
if (y_bottom > info->var.yres_virtual)
return -EINVAL;
acornfb_update_dma(info, var);