USB: cdc-acm: clean up open error handling

No need to kill ctrl urb on errors as this is done later during close.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/class/cdc-acm.c

@@ -568,7 +568,7 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
 
 	if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
 	    (acm->ctrl_caps & USB_CDC_CAP_LINE))
-		goto full_bailout;
+		goto bail_out;
 
 	usb_autopm_put_interface(acm->control);
 
@@ -592,8 +592,6 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
 	mutex_unlock(&open_mutex);
 	return rv;
 
-full_bailout:
-	usb_kill_urb(acm->ctrlurb);
 bail_out:
 	acm->port.count--;
 	mutex_unlock(&acm->mutex);