diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index c5c891c8714e2836c59299aa53fa8f7b786d7828..f3432cca3fdcb9d3c449920835afe4ea4edddb91 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1293,6 +1293,7 @@ static void sci_tx_dma_release(struct sci_port *s)
 {
 	struct dma_chan *chan = s->chan_tx_saved;
 
+	cancel_work_sync(&s->work_tx);
 	s->chan_tx_saved = s->chan_tx = NULL;
 	s->cookie_tx = -EINVAL;
 	dmaengine_terminate_all(chan);
@@ -1548,10 +1549,9 @@ static void sci_request_dma(struct uart_port *port)
 				__func__, UART_XMIT_SIZE,
 				port->state->xmit.buf, &s->tx_dma_addr);
 
+			INIT_WORK(&s->work_tx, work_fn_tx);
 			s->chan_tx_saved = s->chan_tx = chan;
 		}
-
-		INIT_WORK(&s->work_tx, work_fn_tx);
 	}
 
 	chan = sci_request_dma_chan(port, DMA_DEV_TO_MEM);