[PATCH 1/5] USB: serial: cp210x: disable interface on errors in open

[Johan Hovold <johan@kernel.org>]

Try to disable the serial interface in the unlikely event that generic
open() fails.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/cp210x.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index a90801ef0055..c01c7863dd1a 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -824,7 +824,16 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (tty)
 		cp210x_change_speed(tty, port, NULL);
 
-	return usb_serial_generic_open(tty, port);
+	result = usb_serial_generic_open(tty, port);
+	if (result)
+		goto err_disable;
+
+	return 0;
+
+err_disable:
+	cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
+
+	return result;
 }
 
 static void cp210x_close(struct usb_serial_port *port)
-- 
2.26.2