From mboxrd@z Thu Jan  1 00:00:00 1970
From: <twischer@de.adit-jv.com>
Subject: [PATCH - IOPLUG DRAIN 0/2]
Date: Thu, 22 Mar 2018 14:48:55 +0100
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Hi Takashi,

> Why not poll()?

> IOW, why ioplug must be handled specially regarding the non-blocking
>operation?  The normal kernel driver behaves like that (returning
> -EAGAIN, and let apps to sync with poll()).


What do you think about the following solution?

(I thought the whole time that you have to use snd_pcm_wait() to wait for drain
in nonblocking mode but you have to use the poll_descriptors directly.)

Know I am expecting that the user is calling poll()
if snd_pcm_drain() returns -EAGAIN and
the user has to call snd_pcm_drain() again after poll returns
to check if drain is done.

Thanks for your help so far.

Best regards

Timo