Here's setting software signaling bit for the stub fence which is always signaled. If this fence signaling bit is not set then the AMD GPU scheduler will cause a GPU reset due to a GPU scheduler cleanup activity timeout.
Signed-off-by: Arvind Yadav Arvind.Yadav@amd.com Reviewed-by: Christian König christian.koenig@amd.com ---
Changes in v1 : 1- Addressing Christian's comment to remove unnecessary callback. 2- Replacing CONFIG_DEBUG_WW_MUTEX_SLOWPATH instead of CONFIG_DEBUG_FS. 3- The version of this patch is also changed and previously it was [PATCH 3/4]
Changes in v2 : 1 - perviously using __dma_fence_enable_signaling() for enable signaling. 2 - #ifdef CONFIG_DEBUG_WW_MUTEX_SLOWPATH removed
Changes in v3 : 1 - Enable Signaling bit for dma_fence_allocate_private_stub.
--- drivers/dma-buf/dma-fence.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 64c99739ad23..645c158b7e01 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -136,6 +136,10 @@ struct dma_fence *dma_fence_get_stub(void) &dma_fence_stub_ops, &dma_fence_stub_lock, 0, 0); + + set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, + &dma_fence_stub.flags); + dma_fence_signal_locked(&dma_fence_stub); } spin_unlock(&dma_fence_stub_lock); @@ -161,6 +165,10 @@ struct dma_fence *dma_fence_allocate_private_stub(void) &dma_fence_stub_ops, &dma_fence_stub_lock, 0, 0); + + set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, + &dma_fence_stub.flags); + dma_fence_signal(fence);
return fence;