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[RFC,v1,5/7] serial: imx: set_termios(): do not enable autoRTS if RTS is unset

Message ID 1561042073-617-6-git-send-email-sorganov@gmail.com (mailing list archive)
State RFC
Headers show
Series serial: imx: fix RTS and RTS/CTS handling | expand

Commit Message

Sergey Organov June 20, 2019, 2:47 p.m. UTC 
set_termios() shouldn't set UCR2_CTSC bit if UCR2_CTS (=TIOCM_RTS) is
cleared. Added corresponding check in imx_uart_rts_auto() to fix this.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
---
 drivers/tty/serial/imx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e0f5365..4867f80 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -405,7 +405,8 @@  static void imx_uart_rts_inactive(struct imx_port *sport, u32 *ucr2)
 /* called with port.lock taken and irqs caller dependent */
 static void imx_uart_rts_auto(struct imx_port *sport, u32 *ucr2)
 {
-	*ucr2 |= UCR2_CTSC;
+	if (*ucr2 & UCR2_CTS)
+		*ucr2 |= UCR2_CTSC;
 }
 
 /* called with port.lock taken and irqs off */