[PATCH 06/26] dma-buf: use new iterator in dma_resv_test_signaled

From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org,
	linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org
Cc: daniel@ffwll.ch, tvrtko.ursulin@linux.intel.com
Subject: [PATCH 06/26] dma-buf: use new iterator in dma_resv_test_signaled
Date: Thu, 16 Sep 2021 13:30:22 +0200	[thread overview]
Message-ID: <20210916113042.3631-7-christian.koenig@amd.com> (raw)
In-Reply-To: <20210916113042.3631-1-christian.koenig@amd.com>

This makes the function much simpler since the complex
retry logic is now handled elsewhere.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/dma-buf/dma-resv.c | 54 +++++---------------------------------
 1 file changed, 7 insertions(+), 47 deletions(-)

diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index 764a71ec2347..fae881a5d336 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -591,22 +591,6 @@ long dma_resv_wait_timeout(struct dma_resv *obj, bool wait_all, bool intr,
 EXPORT_SYMBOL_GPL(dma_resv_wait_timeout);
 
 
-static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
-{
-	struct dma_fence *fence, *lfence = passed_fence;
-	int ret = 1;
-
-	if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &lfence->flags)) {
-		fence = dma_fence_get_rcu(lfence);
-		if (!fence)
-			return -1;
-
-		ret = !!dma_fence_is_signaled(fence);
-		dma_fence_put(fence);
-	}
-	return ret;
-}
-
 /**
  * dma_resv_test_signaled - Test if a reservation object's fences have been
  * signaled.
@@ -623,43 +607,19 @@ static inline int dma_resv_test_signaled_single(struct dma_fence *passed_fence)
  */
 bool dma_resv_test_signaled(struct dma_resv *obj, bool test_all)
 {
+	struct dma_resv_iter cursor;
 	struct dma_fence *fence;
-	unsigned int seq;
-	int ret;
 
 	rcu_read_lock();
-retry:
-	ret = true;
-	seq = read_seqcount_begin(&obj->seq);
-
-	if (test_all) {
-		struct dma_resv_list *fobj = dma_resv_shared_list(obj);
-		unsigned int i, shared_count;
-
-		shared_count = fobj ? fobj->shared_count : 0;
-		for (i = 0; i < shared_count; ++i) {
-			fence = rcu_dereference(fobj->shared[i]);
-			ret = dma_resv_test_signaled_single(fence);
-			if (ret < 0)
-				goto retry;
-			else if (!ret)
-				break;
+	dma_resv_for_each_fence_unlocked(obj, &cursor, test_all, fence) {
+		if (!dma_fence_is_signaled(fence)) {
+			rcu_read_unlock();
+			dma_fence_put(fence);
+			return false;
 		}
 	}
-
-	fence = dma_resv_excl_fence(obj);
-	if (ret && fence) {
-		ret = dma_resv_test_signaled_single(fence);
-		if (ret < 0)
-			goto retry;
-
-	}
-
-	if (read_seqcount_retry(&obj->seq, seq))
-		goto retry;
-
 	rcu_read_unlock();
-	return ret;
+	return true;
 }
 EXPORT_SYMBOL_GPL(dma_resv_test_signaled);
 
-- 
2.25.1

