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drm/ttm: fix adding foreign BOs to the LRU during init v2 

If we import a BO with an external reservation object we don't
reserve/unreserve it. So we never add it to the LRU causing a possible
denial of service.

v2: fix typo in commit message

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-01-11 15:35:18 +01:00 committed by Alex Deucher
parent e3837b00b6
commit 33d48cf825
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/ttm/ttm_bo.c
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@ -1170,9 +1170,15 @@ int ttm_bo_init(struct ttm_bo_device *bdev,
if (likely(!ret))
ret = ttm_bo_validate(bo, placement, interruptible, false);
if (!resv)
if (!resv) {
ttm_bo_unreserve(bo);
} else if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
spin_lock(&bo->glob->lru_lock);
ttm_bo_add_to_lru(bo);
spin_unlock(&bo->glob->lru_lock);
}
if (unlikely(ret))
ttm_bo_unref(&bo);