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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>
This commit is contained in:
Uwe Kleine-König 2018-03-02 11:07:25 +01:00 committed by Greg Kroah-Hartman
parent 02b0abd3bb
commit dedc64e02f
1 changed files with 0 additions and 9 deletions
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9
drivers/tty/serial/imx.c
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@ -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);