diff options
| author | Jakob Bornecrantz <jakob@vmware.com> | 2013-10-30 09:46:56 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 19:05:42 (GMT) |
| commit | 032cefc6d64dee023a98a41f56b5c16487eb202b (patch) | |
| tree | 033f9cd2a76cad67d35d99ee870df4214b35a7e6 /drivers | |
| parent | ca530d3002a6670445585e0311cb46bcaa548fd2 (diff) | |
| download | linux-fsl-qoriq-032cefc6d64dee023a98a41f56b5c16487eb202b.tar.xz | |
drm/ttm: Handle in-memory region copies
commit 9a0599ddeae012a771bba5e23393fc52d8a59d89 upstream.
Fix the case where the ttm pointer may be NULL causing
a NULL pointer dereference.
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellström <thellstrom@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 7cc904d..8369e35c 100644 --- 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_object *bo, 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 |