From 2c992cd73772bd0ef107536e8e3399d28493caa8 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 18 Apr 2013 17:33:21 +0200
Subject: [PATCH] USB: ti_usb_3410_5052: query hardware-buffer status in
 chars_in_buffer

Query hardware-buffer status in chars_in_buffer should the write fifo be
empty.

This is needed to make the tty layer wait for hardware buffers to drain
on close.

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