From 9b289932610edff7d0c11228efbf7a6f81361298 Mon Sep 17 00:00:00 2001
From: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Date: Sat, 20 Jun 2015 19:25:35 +0200
Subject: [PATCH] serial: imx: count tty buffer overruns

As can be seen in function uart_insert_char (serial_core) the element
buf_overrun of struct uart_icount is used to count overruns of
tty-buffer.
Added support for counting of overruns in imx driver analogue to
serial_core.

Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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