[alsa-devel] Infinite loop in snd_pcm_hw_htimestamp() for capture PCMs?

Takashi Iwai tiwai at suse.de
Fri Sep 21 18:02:07 CEST 2012

At Fri, 21 Sep 2012 10:53:43 -0500,
Andrew Eikum wrote:
> Hi folks,
> I've found some unexpected behavior in alsa-lib. The attached program
> uses 100% CPU in an infinite loop, when I'd expect it to return either
> an error or a valid htimestamp. I believe the loop occurs in
> <src/pcm/pcm_hw.c:snd_pcm_hw_htimestamp()>. Am I not supposed to call
> htimestamp() on this type of PCM? Is the PCM still in an invalid state
> when htimestamp() is called?

Indeed, it's a bug in dmix/dsnoop/dshare plugins.
Fixed now in git tree.



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