serial: imx: Stop to receive in .stop_rx()

When the UART is used in DMA mode, .stop_rx() does nothing if the port
isn't suspended. This is wrong as .stop_rx() should stop receiving
characters unconditionally. When the port is about to be closed the DMA
channel is stopped in .shutdown(), so this isn't necessary to be in
.stop_rx() here, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/imx.c

@@ -442,15 +442,6 @@ static void imx_stop_rx(struct uart_port *port)
 	struct imx_port *sport = (struct imx_port *)port;
 	u32 ucr1, ucr2;
 
-	if (sport->dma_is_rxing) {
-		if (sport->port.suspended) {
-			dmaengine_terminate_all(sport->dma_chan_rx);
-			sport->dma_is_rxing = 0;
-		} else {
-			return;
-		}
-	}
-
 	ucr2 = imx_uart_readl(sport, UCR2);
 	imx_uart_writel(sport, ucr2 & ~UCR2_RXEN, UCR2);