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When we get a PBDMA MMU fault, we won't be able to map the MMU id into an engine id for reset. We still pass FIFO_INVAL_ENGINE_ID to gk20a_fifo_should_defer_engine_reset() which causes an unnecessary debug spew. Check for FIFO_INVAL_ENGINE before calling gk20a_fifo_should_defer_engine_reset(). Change-Id: I6f4a49be194cbc6070c1a1c667059de2ea79790f Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: http://git-master/r/1321492 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>