[3.5.y.z,extended,stable] Patch "drm/mgag200: Invalidate page tables when pinning a BO" has been added to staging queue

Message ID 1376402382-18420-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Aug. 13, 2013, 1:59 p.m.
This is a note to let you know that I have just added a patch titled

    drm/mgag200: Invalidate page tables when pinning a BO

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



From 6555dce4b101ee3a272f0ceba8dca8e4211b1d32 Mon Sep 17 00:00:00 2001
From: Egbert Eich <eich@suse.com>
Date: Wed, 17 Jul 2013 17:40:56 +0200
Subject: [PATCH] drm/mgag200: Invalidate page tables when pinning a BO

commit ecaac1c866bcda4780a963b3d18cd310d971aea3 upstream.

When a BO gets pinned the placement may get changed. If the memory is
mapped into user space and user space has already accessed the mapped
range the page tables are set up but now point to the wrong memory.
Set bo.mdev->dev_mapping in mgag200_bo_create() to make sure that
ttm_bo_unmap_virtual() called from ttm_bo_handle_move_mem() will take
care of this.

v2: Don't call ttm_bo_unmap_virtual() in mgag200_bo_pin(), fix comment.

Signed-off-by: Egbert Eich <eich@suse.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
 drivers/gpu/drm/mgag200/mgag200_ttm.c | 1 +
 1 file changed, 1 insertion(+)



diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
index a707394..95b5377 100644
--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
+++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
@@ -347,6 +347,7 @@  int mgag200_bo_create(struct drm_device *dev, int size, int align,

 	mgabo->gem.driver_private = NULL;
 	mgabo->bo.bdev = &mdev->ttm.bdev;
+	mgabo->bo.bdev->dev_mapping = dev->dev_mapping;

 	mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);