diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 8d88e84c8c58..c82aa8ae1454 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -358,11 +358,8 @@ void __dma_fence_might_wait(void)
  *
  * Unlike dma_fence_signal_timestamp(), this function must be called with
  * &dma_fence.lock held.
- *
- * Returns 0 on success and a negative error value when @fence has been
- * signalled already.
  */
-int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
+void dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 				      ktime_t timestamp)
 {
 	struct dma_fence_cb *cur, *tmp;
@@ -372,7 +369,7 @@ int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 
 	if (unlikely(test_and_set_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
 				      &fence->flags)))
-		return -EINVAL;
+		return;
 
 	/* Stash the cb_list before replacing it with the timestamp */
 	list_replace(&fence->cb_list, &cb_list);
@@ -385,8 +382,6 @@ int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
 		INIT_LIST_HEAD(&cur->node);
 		cur->func(fence, cur);
 	}
-
-	return 0;
 }
 EXPORT_SYMBOL(dma_fence_signal_timestamp_locked);
 
@@ -401,23 +396,17 @@ EXPORT_SYMBOL(dma_fence_signal_timestamp_locked);
  * can only go from the unsignaled to the signaled state and not back, it will
  * only be effective the first time. Set the timestamp provided as the fence
  * signal timestamp.
- *
- * Returns 0 on success and a negative error value when @fence has been
- * signalled already.
  */
-int dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp)
+void dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp)
 {
 	unsigned long flags;
-	int ret;
 
 	if (WARN_ON(!fence))
-		return -EINVAL;
+		return;
 
 	spin_lock_irqsave(fence->lock, flags);
-	ret = dma_fence_signal_timestamp_locked(fence, timestamp);
+	dma_fence_signal_timestamp_locked(fence, timestamp);
 	spin_unlock_irqrestore(fence->lock, flags);
-
-	return ret;
 }
 EXPORT_SYMBOL(dma_fence_signal_timestamp);
 
@@ -433,13 +422,10 @@ EXPORT_SYMBOL(dma_fence_signal_timestamp);
  *
  * Unlike dma_fence_signal(), this function must be called with &dma_fence.lock
  * held.
- *
- * Returns 0 on success and a negative error value when @fence has been
- * signalled already.
  */
-int dma_fence_signal_locked(struct dma_fence *fence)
+void dma_fence_signal_locked(struct dma_fence *fence)
 {
-	return dma_fence_signal_timestamp_locked(fence, ktime_get());
+	dma_fence_signal_timestamp_locked(fence, ktime_get());
 }
 EXPORT_SYMBOL(dma_fence_signal_locked);
 
@@ -496,28 +482,22 @@ EXPORT_SYMBOL(dma_fence_check_and_signal);
  * dma_fence_add_callback(). Can be called multiple times, but since a fence
  * can only go from the unsignaled to the signaled state and not back, it will
  * only be effective the first time.
- *
- * Returns 0 on success and a negative error value when @fence has been
- * signalled already.
  */
-int dma_fence_signal(struct dma_fence *fence)
+void dma_fence_signal(struct dma_fence *fence)
 {
 	unsigned long flags;
-	int ret;
 	bool tmp;
 
 	if (WARN_ON(!fence))
-		return -EINVAL;
+		return;
 
 	tmp = dma_fence_begin_signalling();
 
 	spin_lock_irqsave(fence->lock, flags);
-	ret = dma_fence_signal_timestamp_locked(fence, ktime_get());
+	dma_fence_signal_timestamp_locked(fence, ktime_get());
 	spin_unlock_irqrestore(fence->lock, flags);
 
 	dma_fence_end_signalling(tmp);
-
-	return ret;
 }
 EXPORT_SYMBOL(dma_fence_signal);
 
diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
index 0504afe52c2a..d4c92fd35092 100644
--- a/include/linux/dma-fence.h
+++ b/include/linux/dma-fence.h
@@ -364,13 +364,12 @@ static inline void dma_fence_end_signalling(bool cookie) {}
 static inline void __dma_fence_might_wait(void) {}
 #endif
 
-int dma_fence_signal(struct dma_fence *fence);
+void dma_fence_signal(struct dma_fence *fence);
 bool dma_fence_check_and_signal(struct dma_fence *fence);
 bool dma_fence_check_and_signal_locked(struct dma_fence *fence);
-int dma_fence_signal_locked(struct dma_fence *fence);
-int dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp);
-int dma_fence_signal_timestamp_locked(struct dma_fence *fence,
-				      ktime_t timestamp);
+void dma_fence_signal_locked(struct dma_fence *fence);
+void dma_fence_signal_timestamp(struct dma_fence *fence, ktime_t timestamp);
+void dma_fence_signal_timestamp_locked(struct dma_fence *fence, ktime_t timestamp);
 signed long dma_fence_default_wait(struct dma_fence *fence,
 				   bool intr, signed long timeout);
 int dma_fence_add_callback(struct dma_fence *fence,