From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 21 Mar 2013 11:37:01 +0000 (+0100)
Subject: USB: ch341: fix TIOCMIWAIT and disconnect
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~135^2~165
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3f550431925891d2ea4338d298aceeceb1c6cbf1;p=pandora-kernel.git

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>
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