From: Michael Spang <spang@chromium.org>
Date: Wed, 27 Mar 2013 23:34:25 +0000 (-0400)
Subject: serial: samsung: Avoid waiting forever for TX ready
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~136^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38adbc54cea90e220c9212f961a621b2c6af9ae0;p=pandora-kernel.git

serial: samsung: Avoid waiting forever for TX ready

The no_console_suspend option allows the console to write to the UART
during early resume, before the serial port itself is resumed. Such
writes hang indefinitely waiting for TX ready.

This adds a check to the console putchar function to drop characters
instead of hanging if the port hasn't been initialized. That way, we
can use no_console_suspend without risk of hanging.

Signed-off-by: Michael Spang <spang@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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