[pulseaudio-discuss] alsa-sink: fix revents bug when meet underrun

[Pierre-Louis Bossart]

> If this is an error case that should not really happen should we really
> be papering over such errors? Would it not be better to fix whatever it
> is that is doing things wrong?

Indeed. The driver seems to be the problem here.
That said, this patch should be merged to make the log easier to understand.