From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Subject: Re: [RFC][PATCH] ALSA: firewire-lib: permit process
 context only to flush queued packets for better PCM period granularity
Date: Tue, 10 May 2016 23:07:50 +0900
Message-ID: <5731EB36.3070706@sakamocchi.jp>
References: <1462625196-3640-1-git-send-email-o-takashi@sakamocchi.jp>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <alsa-devel-bounces@alsa-project.org>
Received: from smtp311.phy.lolipop.jp (smtp311.phy.lolipop.jp [210.157.22.79])
 by alsa0.perex.cz (Postfix) with ESMTP id 416E8261600
 for <alsa-devel@alsa-project.org>; Tue, 10 May 2016 16:07:56 +0200 (CEST)
In-Reply-To: <1462625196-3640-1-git-send-email-o-takashi@sakamocchi.jp>
List-Unsubscribe: <http://mailman.alsa-project.org/mailman/options/alsa-devel>,
 <mailto:alsa-devel-request@alsa-project.org?subject=unsubscribe>
List-Archive: <http://mailman.alsa-project.org/pipermail/alsa-devel/>
List-Post: <mailto:alsa-devel@alsa-project.org>
List-Help: <mailto:alsa-devel-request@alsa-project.org?subject=help>
List-Subscribe: <http://mailman.alsa-project.org/mailman/listinfo/alsa-devel>,
 <mailto:alsa-devel-request@alsa-project.org?subject=subscribe>
Errors-To: alsa-devel-bounces@alsa-project.org
Sender: alsa-devel-bounces@alsa-project.org
To: clemens@ladisch.de
Cc: alsa-devel@alsa-project.org, ffado-devel@lists.sf.net
List-Id: alsa-devel@alsa-project.org
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