From: Huang Shijie <b32955@freescale.com>
Date: Wed, 22 Jan 2014 08:23:37 +0000 (+0800)
Subject: serial: imx: always wake up the processes in the TX callback
X-Git-Tag: v3.15-rc1~138^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ad28e3efee21a5bbf940c83d1f0395b76bd3efb;p=pandora-kernel.git

serial: imx: always wake up the processes in the TX callback

The current code only wakes up the processes when the circle
buffer has less data then the WAKEUP_CHARS.

But sometimes, the circle buffer may has data more then the WAKEUP_CHARS,
in such case, the processes will hang.

This patch makes it always wakes up the processes in the TX callback.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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