From ff55fe9ac19d800bfab02bc877c06e74f3e2537d Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 14 Jun 2011 09:24:44 +0000 Subject: [PATCH] radeonfb: 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. Also use the aligned fix.line_length and not the (possible) unaligned xres_virtual. Signed-off-by: Laurent Pinchart Cc: Benjamin Herrenschmidt Signed-off-by: Paul Mundt --- drivers/video/aty/radeon_base.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c index 32f8cf6200a7..150684882ef7 100644 --- a/drivers/video/aty/radeon_base.c +++ b/drivers/video/aty/radeon_base.c @@ -845,16 +845,16 @@ static int radeonfb_pan_display (struct fb_var_screeninfo *var, { struct radeonfb_info *rinfo = info->par; - if ((var->xoffset + var->xres > var->xres_virtual) - || (var->yoffset + var->yres > var->yres_virtual)) - return -EINVAL; + if ((var->xoffset + info->var.xres > info->var.xres_virtual) + || (var->yoffset + info->var.yres > info->var.yres_virtual)) + return -EINVAL; if (rinfo->asleep) return 0; radeon_fifo_wait(2); - OUTREG(CRTC_OFFSET, ((var->yoffset * var->xres_virtual + var->xoffset) - * var->bits_per_pixel / 8) & ~7); + OUTREG(CRTC_OFFSET, (var->yoffset * info->fix.line_length + + var->xoffset * info->var.bits_per_pixel / 8) & ~7); return 0; }