[PATCH] dma-fence: Move signalling tracepoint to before ops detach

[Tvrtko Ursulin <tvrtko.ursulin@igalia.com>]

Move the signalling tracepoint to before fence->ops are reset otherwise
tracepoint will dereference a null pointer.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Fixes: 541c8f2468b9 ("dma-buf: detach fence ops on signal v3")
Cc: Christian König <christian.koenig@amd.com>
Cc: Philipp Stanner <phasta@kernel.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
---
 drivers/dma-buf/dma-fence.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 1826ba73094c..1c1eaecaf1b0 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -363,6 +363,8 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 				      &fence->flags)))
 		return;
 
+	trace_dma_fence_signaled(fence);
+
 	/*
 	 * When neither a release nor a wait operation is specified set the ops
 	 * pointer to NULL to allow the fence structure to become independent
@@ -377,7 +379,6 @@ void dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 
 	fence->timestamp = timestamp;
 	set_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags);
-	trace_dma_fence_signaled(fence);
 
 	list_for_each_entry_safe(cur, tmp, &cb_list, node) {
 		INIT_LIST_HEAD(&cur->node);
-- 
2.52.0