From: Johan Hovold <jhovold@gmail.com>
Date: Wed, 8 May 2013 15:51:43 +0000 (+0200)
Subject: USB: serial: add generic wait_until_sent implementation
X-Git-Tag: v3.10-rc3~26^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcf0105039660e951dfea348d317043d17988dfc;p=pandora-kernel.git

USB: serial: add generic wait_until_sent implementation

Add generic wait_until_sent implementation which polls for empty
hardware buffers using the new port-operation tx_empty.

The generic implementation will be used for all sub-drivers that
implement tx_empty but does not define wait_until_sent.

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