diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 3a732ac952850eec6df7052b34f87f21070e8168..7ea9184eaa13eaa0ad444cbab396d7c32bea749e 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1237,6 +1237,9 @@ static inline struct dma_chan
 	if (chan)
 		return chan;
 
+	if (!fn || !fn_param)
+		return NULL;
+
 	return __dma_request_channel(mask, fn, fn_param);
 }
 #endif /* DMAENGINE_H */