Re: [PATCH 1/8] ALSA: rawmidi: Expose the tied device number in info ioctl

[Jaroslav Kysela <perex@xxxxxxxx>]

On 10. 01. 25 16:59, Takashi Iwai wrote:
> The UMP legacy rawmidi is derived from the UMP rawmidi, but currently
> there is no way to know which device is involved in other side.
>
> This patch extends the rawmidi info ioctl to show the tied device
> number.  As default it stores -1, indicating that no tied device.

Seeing the alsa-lib changes, it may be probably better to keep zero as unknown 
and define this field as (device number + 1) to avoid bad interpretation for 
older kernels without protocol version checks.

					Jaroslav

--
Jaroslav Kysela <perex@xxxxxxxx>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.