commit 3f550431925891d2ea4338d298aceeceb1c6cbf1
author Johan Hovold <jhovold@gmail.com> Thu Mar 21 12:37:01 2013 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Mon Mar 25 13:50:52 2013 -0700
tree 45b84306a3c25816bbbe249f69e1911834480ccc
parent 7bb98f0edd1df8687ca9c8ce9492f8ac6b8ec448

USB: ch341: fix TIOCMIWAIT and disconnect

Use tty-port modem-status-change wait queue on which processes are woken
up at hangup and disconnect.

Currently a process waiting on modem-status changes will not be woken on
device disconnect as wake up was only done in dtr_rts which isn't
guaranteed to be called (e.g. if HUPCL is not set).

Also remove the redundant wake-up call from dtr_rts.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>