From bde08ce4d7bf2e59054ea1c522e82037c9dd147b Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Wed, 16 Oct 2019 13:33:36 +1000 Subject: [PATCH] llvmpipe: handle compute shader launch with 0 threads If you set LP_NUM_THREADS=0 compute shaders would hang, just execute the workloads in sequence if we have no threads in the pool. Fixes: 1b24e3ba75 ("llvmpipe: add compute threadpool + mutex") Reviewed-by: Roland Scheidegger --- src/gallium/drivers/llvmpipe/lp_cs_tpool.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/gallium/drivers/llvmpipe/lp_cs_tpool.c b/src/gallium/drivers/llvmpipe/lp_cs_tpool.c index 6f1b4e2ee55..26e82ab1285 100644 --- a/src/gallium/drivers/llvmpipe/lp_cs_tpool.c +++ b/src/gallium/drivers/llvmpipe/lp_cs_tpool.c @@ -114,6 +114,15 @@ lp_cs_tpool_queue_task(struct lp_cs_tpool *pool, { struct lp_cs_tpool_task *task; + if (pool->num_threads == 0) { + struct lp_cs_local_mem lmem; + + memset(&lmem, 0, sizeof(lmem)); + for (unsigned t = 0; t < num_iters; t++) { + work(data, t, &lmem); + } + return NULL; + } task = CALLOC_STRUCT(lp_cs_tpool_task); if (!task) { return NULL; -- 2.30.2