[PATCH -next] serial: sprd: Fix a copy-paste err in sprd_request_dma()

[YueHaibing <yuehaibing@xxxxxxxxxx>]

when dma_request_chan rx_dma fails, dev_err log should print rx_dma
err log.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/tty/serial/sprd_serial.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index 6aebd77cd3c0..73d71a4e6c0c 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -506,7 +506,7 @@ static void sprd_request_dma(struct uart_port *port)
 	sp->rx_dma.chn = dma_request_chan(port->dev, "rx");
 	if (IS_ERR(sp->rx_dma.chn)) {
 		dev_err(port->dev, "request RX DMA channel failed, ret = %ld\n",
-			PTR_ERR(sp->tx_dma.chn));
+			PTR_ERR(sp->rx_dma.chn));
 		sp->rx_dma.enable = false;
 	}
 }