Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michal Srb , Dave Airlie Subject: [ 39/60] drm/cirrus: Invalidate page tables when pinning a BO Date: Mon, 12 Aug 2013 23:34:06 -0700 Message-Id: <20130813063337.463966880@linuxfoundation.org> In-Reply-To: <20130813063331.950321483@linuxfoundation.org> References: <20130813063331.950321483@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Michal Srb commit 109a51598869a39fdcec2d49672a9a39b6d89481 upstream. This is a cirrus version of Egbert Eich's patch for mgag200. Without bo.bdev->dev_mapping set, the ttm_bo_unmap_virtual_locked called from ttm_bo_handle_move_mem returns with no effect. If any application accessed the memory before it was moved, it will access wrong memory next time. This causes crashes when changing resolution down. Signed-off-by: Michal Srb Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/cirrus/cirrus_ttm.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/cirrus/cirrus_ttm.c +++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c @@ -353,6 +353,7 @@ int cirrus_bo_create(struct drm_device * cirrusbo->gem.driver_private = NULL; cirrusbo->bo.bdev = &cirrus->ttm.bdev; + cirrusbo->bo.bdev->dev_mapping = dev->dev_mapping; cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);