From: Baurzhan Ismagulov <ibr@radix50.net>
Date: Thu, 11 Nov 2010 09:53:03 +0000 (+0100)
Subject: serial: cpm_uat: reducing CPM serial latency
X-Git-Tag: v2.6.38-rc1~464^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b04ec4ad8e2ffdc9d1f27fd6eb5118e919bc87d;p=pandora-kernel.git

serial: cpm_uat: reducing CPM serial latency

Setting Rx FIFO size to 1 reduces reader process wakeup latency up to
20x for baud rates <= 9600. This patch sets the Rx FIFO size to 1 for
baud rates <= 9600 or if low latency has been requested for the tty.

Signed-off-by: Michael Trimarchi <michael@gandalf.sssup.it>
Signed-off-by: Bruno Morelli <bruno@evidence.eu.com>
Signed-off-by: Baurzhan Ismagulov <ibr@radix50.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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