From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 27 Jul 2015 16:09:33 +0000 (+0200)
Subject: serial: mpc52xx: let tx_empty callback return either 0 or TIOCSER_TEMT
X-Git-Tag: omap-for-v4.3/fixes-merge-window~43^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d07ada047a4e1f5ff98757ce34c0fdd13d8ec93;p=pandora-kernel.git

serial: mpc52xx: let tx_empty callback return either 0 or TIOCSER_TEMT

Documenation/serial/driver requests that the tx_empty callback should
return 0 if there are still chars in the fifo or shifter or TIOCSER_TEMT
(0x01) if no character is pending to be sent.

Fix the mpc52xx serial driver to not return MPC52xx_PSC_SR_TXEMP (i.e.
0x0800) but TIOCSER_TEMT as documented.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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