From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Richter Subject: Re: [PATCH 39/39] bebob: Add support for M-Audio special Firewire series Date: Sat, 1 Mar 2014 15:32:26 +0100 Message-ID: <20140301153226.1673cae7@stein> References: <1393558072-25926-1-git-send-email-o-takashi@sakamocchi.jp> <1393558072-25926-40-git-send-email-o-takashi@sakamocchi.jp> <20140301115340.589ab770@stein> <5311DB6D.3020703@sakamocchi.jp> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from einhorn.in-berlin.de (einhorn.in-berlin.de [192.109.42.8]) by alsa0.perex.cz (Postfix) with ESMTP id C19CA265327 for ; Sat, 1 Mar 2014 15:32:29 +0100 (CET) In-Reply-To: <5311DB6D.3020703@sakamocchi.jp> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Takashi Sakamoto Cc: tiwai@suse.de, alsa-devel@alsa-project.org, clemens@ladisch.de, ffado-devel@lists.sf.net List-Id: alsa-devel@alsa-project.org On Mar 01 Takashi Sakamoto wrote: [M-Audio devices with misbehaving IRM feature] > Currently I'm also not sure. So I want it pending for my future work. > > Actually, the failure of operation to CSR_CHANNELS_AVAILABLE_HI appears > in stopping streams. When starting streams, retries in > manage_channels()/manage_bandwidth() works fine. So users can use their > devices as usual. > > The disadvantages may appears when the driver handles this failure many > times. Then users will see this message 'isochronous resources exhausted'. > > I think the way to recover this state is just to reboot the system. But > this state doesn't bring sudden hangup to system. Users can observer > what happened. Another way to recover would be a 1394 bus reset, for example initiated by "ffadotest BusReset", or "firecontrol <<< 'br short'", or using the gscanbus GUI. > With trade-off of the fact that there is no driver for these devices in > both of user-land/kernel-land, I want to include these patches. I agree. -- Stefan Richter -=====-====- --== ----= http://arcgraph.de/sr/