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>

1 files changed, 0 insertions, 9 deletions

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 9b92c49fc174..0ea98827ecbe 100644
--- a/drivers/tty/serial/imx.c
+++ b/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);