Re: [alsa-devel] RawMIDI behaviour with MidiFace 4x4

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