Am 15.07.22 um 13:31 schrieb Dmitry Osipenko:
On 7/15/22 14:15, Christian König wrote:
I've stumbled over this while reviewing patches for DMA-buf and it looks
like we completely messed the locking up here.
In general most TTM function should only be called while holding the
appropriate BO resv lock. Without this we could break the internal
buffer object state here.
Could you please clarify which part of the TTM state is affected?
The ttm_bo_vmap() function calls ttm_mem_io_reserve() with bo->resource
as parameter.
Since bo->resource is protected by the lock we must make sure that we
are holding the lock while doing this.
Regards,
Christian.
