This is a note to let you know that I've just added the patch titled
drm/ttm: Handle in-memory region copies
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-ttm-handle-in-memory-region-copies.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9a0599ddeae012a771bba5e23393fc52d8a59d89 Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@xxxxxxxxxx>
Date: Wed, 30 Oct 2013 02:46:56 -0700
Subject: drm/ttm: Handle in-memory region copies
From: Jakob Bornecrantz <jakob@xxxxxxxxxx>
commit 9a0599ddeae012a771bba5e23393fc52d8a59d89 upstream.
Fix the case where the ttm pointer may be NULL causing
a NULL pointer dereference.
Signed-off-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
Signed-off-by: Thomas Hellström <thellstrom@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo_util.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -348,7 +348,9 @@ int ttm_bo_move_memcpy(struct ttm_buffer
if (old_iomap == NULL && ttm == NULL)
goto out2;
- if (ttm->state == tt_unpopulated) {
+ /* TTM might be null for moves within the same region.
+ */
+ if (ttm && ttm->state == tt_unpopulated) {
ret = ttm->bdev->driver->ttm_tt_populate(ttm);
if (ret) {
/* if we fail here don't nuke the mm node
Patches currently in stable-queue which might be from jakob@xxxxxxxxxx are
queue-3.12/drm-ttm-handle-in-memory-region-copies.patch
queue-3.12/drm-vmwgfx-resource-evict-fixes.patch
queue-3.12/drm-ttm-fix-memory-type-compatibility-check.patch
queue-3.12/drm-ttm-fix-ttm_bo_move_memcpy.patch
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