[PATCH v3] cdc-acm: ensure that termios get set when the port is activated

[Jim Paris]

The driver wasn't properly configuring the hardware for the current
termios settings under all conditions.  Ensure that termios are
written to the device when the port is activated.

Signed-off-by: Jim Paris <jim@xxxxxxxx>
---

Switched to Johan's suggestion of using a prototype rather than moving
acm_tty_set_termios.  This depends on his patch in order to get proper
DTR handling.

Thanks,
Jim 

---
 drivers/usb/class/cdc-acm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index e934e19f49f5..d2cd1b6d02a7 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -58,6 +58,9 @@ static struct usb_driver acm_driver;
 static struct tty_driver *acm_tty_driver;
 static struct acm *acm_table[ACM_TTY_MINORS];
 
+static void acm_tty_set_termios(struct tty_struct *tty,
+				struct ktermios *termios_old);
+
 static DEFINE_MUTEX(acm_table_lock);
 
 /*
@@ -554,6 +557,8 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
 		goto error_submit_urb;
 	}
 
+	acm_tty_set_termios(tty, NULL);
+
 	/*
 	 * Unthrottle device in case the TTY was closed while throttled.
 	 */
-- 
2.1.0

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