[CI 6/7] trace

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/dma-buf/dma-fence.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index c493a788aea3..0bef54b892cb 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -350,6 +350,7 @@ static void incr_wait_count(struct dma_fence *fence, struct dma_fence_cb *cb)
 
 	__set_bit(DMA_FENCE_CB_FLAG_WAITCOUNT_BIT, &cb->flags);
 	fence->waitcount++;
+	trace_printk("  ++ %llx:%llu -> %u [%p]\n", fence->context, fence->seqno, fence->waitcount, cb);
 	WARN_ON_ONCE(!fence->waitcount);
 }
 
@@ -357,8 +358,11 @@ static void decr_wait_count(struct dma_fence *fence, struct dma_fence_cb *cb)
 {
 	lockdep_assert_held(fence->lock);
 
+	trace_printk("  -- %llx:%llu @ %u (%lx]) [%p]\n", fence->context, fence->seqno, fence->waitcount, cb->flags, cb);
 	if (__test_and_clear_bit(DMA_FENCE_CB_FLAG_WAITCOUNT_BIT, &cb->flags)) {
 		WARN_ON_ONCE(!fence->waitcount);
+		if (!fence->waitcount)
+			ftrace_dump(DUMP_ALL);
 		fence->waitcount--;
 	}
 }
@@ -401,6 +405,7 @@ int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 	trace_dma_fence_signaled(fence);
 
 	list_for_each_entry_safe(cur, tmp, &cb_list, node) {
+		trace_printk("  S  %llx:%llu @ %u [%p]\n", fence->context, fence->seqno, fence->waitcount, cur);
 		INIT_LIST_HEAD(&cur->node);
 		decr_wait_count(fence, cur);
 		cur->func(fence, cur);
@@ -553,6 +558,8 @@ void dma_fence_release(struct kref *kref)
 
 	trace_dma_fence_destroy(fence);
 
+	trace_printk("  r  %llx:%llu @ %u\n", fence->context, fence->seqno, fence->waitcount);
+
 	if (WARN(!list_empty(&fence->cb_list) &&
 		 !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags),
 		 "Fence %s:%s:%llx:%llx released with pending signals!\n",
@@ -590,6 +597,7 @@ EXPORT_SYMBOL(dma_fence_release);
  */
 void dma_fence_free(struct dma_fence *fence)
 {
+	trace_printk("  f  %llx:%llu @ %u\n", fence->context, fence->seqno, fence->waitcount);
 	kfree_rcu(fence, rcu);
 }
 EXPORT_SYMBOL(dma_fence_free);
@@ -658,9 +666,11 @@ static int add_callback(struct dma_fence *fence, struct dma_fence_cb *cb,
 		incr_wait_count(fence, cb);
 
 	if (__dma_fence_enable_signaling(fence)) {
+		trace_printk("  A  %llx:%llu @ %u [%p]\n", fence->context, fence->seqno, fence->waitcount, cb);
 		cb->func = func;
 		list_add_tail(&cb->node, &fence->cb_list);
 	} else {
+		trace_printk("  a- %llx:%llu @ %u [%p]\n", fence->context, fence->seqno, fence->waitcount, cb);
 		decr_wait_count(fence, cb);
 		INIT_LIST_HEAD(&cb->node);
 		ret = -ENOENT;
@@ -761,6 +771,7 @@ dma_fence_remove_callback(struct dma_fence *fence, struct dma_fence_cb *cb)
 
 	ret = !list_empty(&cb->node);
 	if (ret) {
+		trace_printk("  R  %llx:%llu @ %u [%p]\n", fence->context, fence->seqno, fence->waitcount, cb);
 		decr_wait_count(fence, cb);
 		list_del_init(&cb->node);
 	}
@@ -821,6 +832,7 @@ dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout)
 
 	cb.base.func = dma_fence_default_wait_cb;
 	cb.task = current;
+	trace_printk("  W  %llx:%llu @ %u [%p]\n", fence->context, fence->seqno, fence->waitcount, &cb.base);
 	incr_wait_count(fence, &cb.base);
 	list_add(&cb.base.node, &fence->cb_list);
 
@@ -1004,6 +1016,8 @@ dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
 	fence->waitcount = 0;
 	fence->error = 0;
 
+	trace_printk("  I  %llx:%llu @ %u\n", fence->context, fence->seqno, fence->waitcount);
+
 	trace_dma_fence_init(fence);
 }
 EXPORT_SYMBOL(dma_fence_init);
-- 
2.34.1