diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 53edbf1d8963..fbfe5575bd3c 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1914,7 +1914,7 @@ static void sci_dma_check_tx_occurred(struct sci_port *s)
 	struct dma_tx_state state;
 	enum dma_status status;
 
-	if (!s->chan_tx)
+	if (!s->chan_tx || s->cookie_tx <= 0)
 		return;
 
 	status = dmaengine_tx_status(s->chan_tx, s->cookie_tx, &state);