[alsa-devel] 0 or EAGAIN from snd_pcm_update_avail()?

Ludovico Cavedon ludovico.cavedon at gmail.com
Fri Apr 3 08:20:34 CEST 2009

Hi all,

if snd_pcm_update_avail() gets called on a PCM device in non-blocking
mode when no data is availabe jet, what is the expected return value?
-either is valid

I am asking this question because pulseaudio expect to receive 0, but
the the bluetooth headset pcm transfer callback returns EAGAIN, so I
want to find out against whoms I should open a bug :)

Thanks in advance,

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