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>

parent 3846e93a

drivers/video/acornfb.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);