From: Lars-Peter Clausen <lars@metafoo.de>
Date: Thu, 17 Oct 2013 21:08:09 +0000 (-0700)
Subject: tty: xuartps: Force enable the UART in xuartps_console_write
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~63^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3755f5e6cd222cd5aff949228d32aa8446023a5;p=pandora-kernel.git

tty: xuartps: Force enable the UART in xuartps_console_write

It is possible that under certain circumstances xuartps_console_write is entered
while the UART disabled. When this happens the code will busy loop in
xuartps_console_putchar, since the character is never written and the TXEMPTY
flag is never set. The result is a system lockup. This patch force enables the
UART for the duration of xuartps_console_write to avoid this.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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