On Fri, Apr 3, 2009 at 12:04 AM, Jaroslav Kysela <perex@xxxxxxxx> wrote: > On Thu, 2 Apr 2009, Ludovico Cavedon wrote: >> 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? >> -0 >> -EAGAIN >> -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 :) > > 0. > > -EAGAIN should be returned only for R/W operations but not for buffer > position routines. They should return always immediatelly with useable value > (thus EAGAIN does not make sense). I see. But is it correct for the ioplug module to call the transfer callback when snd_pcm_avail_update() is invoked? Thanks, Ludovico _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
