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drm/ttm: fix busy reference in ttm_mem_evict_first 

The busy BO might actually be already deleted,
so grab only a list reference.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Hellström <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/332877/
alistair/sunxi64-5.4-dsi
Christian König 2019-09-23 10:47:22 +02:00
parent 78e31c4226
commit 73a88e4ce3
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/ttm/ttm_bo.c
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@ -878,11 +878,11 @@ static int ttm_mem_evict_first(struct ttm_bo_device *bdev,
if (!bo) {
if (busy_bo)
ttm_bo_get(busy_bo);
kref_get(&busy_bo->list_kref);
spin_unlock(&glob->lru_lock);
ret = ttm_mem_evict_wait_busy(busy_bo, ctx, ticket);
if (busy_bo)
ttm_bo_put(busy_bo);
kref_put(&busy_bo->list_kref, ttm_bo_release_list);
return ret;
}