usb serial: more fixes and groundwork for tty changes

 - If a termios change fails due to lack of memory we should copy the
   old settings back over as the device has not changed
 - Note various locking problems
 - kl5kusb105 had various remaining tty flag handling problems
 - Make safe_serial use tty_insert_flip_string not open coded loops
 - set termios speed properly in usb_serial

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index ed30adefff85..23188873eb07 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -566,6 +566,8 @@ static int sierra_chars_in_buffer(struct usb_serial_port *port)
          * have sent out, but hasn't made it through to the
          * device as we can't see the backend here, so just
          * tell the tty layer that everything is flushed.
+         *
+         * FIXME: should walk the outstanding urbs info
          */
         return 0;
 }