On Thu, 2 Apr 2009, Ludovico Cavedon wrote: > 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? > -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). Jaroslav ----- Jaroslav Kysela <perex@xxxxxxxx> Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
