Re: ice1712, snd_pcm_mmap_readi(), POLLERR in poll_revents

[Takashi Iwai <tiwai@suse.de>]

At Fri, 16 May 2003 16:03:48 +0200,
Peter Vollmer wrote:
> 
> Hi all,
> 
> I am still trying to get the ice1712-based soundcard to work on an embedded 
> platform, using alsa driver/lib 0.9.3
> While capturing works for hw:0,0 (multitrack mode) using snd_pcm_readi(), I 
> get an -EIO when capturing with snd_pcm_mmap_readi(), immediatly after the 
> buffer is filled up with 4 periods.
> I tracked the problem down to the snd_read_areas() function, where 
> snd_pcm_wait(pcm,-1) returns -EIO (detection of POLLERR in revents), 
> waiting for the soundcard to become ready.

at first you should check in which state the pcm stream is when poll()
returns the error.  alsa-lib code checks the normal errors (XRUN and
SUSPENDED) but the other status are handled as it is.


ciao,

Takashi


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