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acornfb: use display information in info not in var for panning

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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);