From: Fugang Duan <fugang.duan@xxxxxxx>
Disable UCR4_OREN bit in .stop_rx() to avoid endless
interrupt happen while tty port is closing.
Signed-off-by: Fugang Duan <fugang.duan@xxxxxxx>
Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
---
drivers/tty/serial/imx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index fb75e3e0d828..9ecaf051249d 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -486,18 +486,21 @@ static void imx_uart_stop_tx(struct uart_port *port)
static void imx_uart_stop_rx(struct uart_port *port)
{
struct imx_port *sport = (struct imx_port *)port;
- u32 ucr1, ucr2;
+ u32 ucr1, ucr2, ucr4;
ucr1 = imx_uart_readl(sport, UCR1);
ucr2 = imx_uart_readl(sport, UCR2);
+ ucr4 = imx_uart_readl(sport, UCR4);
if (sport->dma_is_enabled) {
ucr1 &= ~(UCR1_RXDMAEN | UCR1_ATDMAEN);
} else {
ucr1 &= ~UCR1_RRDYEN;
ucr2 &= ~UCR2_ATEN;
+ ucr4 &= ~UCR4_OREN;
}
imx_uart_writel(sport, ucr1, UCR1);
+ imx_uart_writel(sport, ucr4, UCR4);
ucr2 &= ~UCR2_RXEN;
imx_uart_writel(sport, ucr2, UCR2);
--
2.17.1
