From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: RawMIDI behaviour with MidiFace 4x4
Date: Wed, 25 Mar 2015 22:45:40 +0100
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To: "Kalvas, Taneli" <taneli.v.m.kalvas@jyu.fi>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
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Kalvas, Taneli wrote:
> What is the policy with external contributions for the snd-usb-audio/midi?

See Documentation/SubmittingPatches.

> From my first session with the usb documents ("USB MIDI Devices 1.0")
> and the kernel code I could not find the flow-control for the midi
> interface buffer in either one.

The flow control is implicit in the USB bulk transfer protocol, i.e.,
the device must accept a packet only when it can handle it.  The host
controller hardware automatically retries sending until this succeeds.


Regards,
Clemens