From b08c9c317e3f7764a91d522cd031639ba42b98cc Mon Sep 17 00:00:00 2001
From: Loic Poulain <loic.poulain@intel.com>
Date: Thu, 24 Apr 2014 11:38:56 +0200
Subject: [PATCH] 8250_core: Fix unwanted TX chars write

On transmit-hold-register empty, serial8250_tx_chars
should be called only if we don't use DMA.
DMA has its own tx cycle.

Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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