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g364fb: 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>
This commit is contained in:
Laurent Pinchart 2011-05-25 11:34:52 +02:00
parent 465cb7e700
commit d8344e090c
1 changed files with 3 additions and 2 deletions
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5
drivers/video/g364fb.c
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@ -149,10 +149,11 @@ int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
static int g364fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if (var->xoffset || var->yoffset + var->yres > var->yres_virtual)
if (var->xoffset ||
var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
*(unsigned int *) TOP_REG = var->yoffset * var->xres;
*(unsigned int *) TOP_REG = var->yoffset * info->var.xres;
return 0;
}