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<DM6467> Problem with capturing sound data

g.f.
Guru 15520 points

Hi,

I have a problem with using DM6467 DVSDK v3.10.00.19.

The problem is while capturing sound data,
there is a phenomenon in which the number of times
of capturing data increases than usual.
It captures more data than input data to DM6467(McASP).

I guess ther are some bug of Linux driver,
so I'm checking  source code(sound/core/pcm_lib.c) of Linux ALSA.
In our system the value of "avail" which is variable of snd_pcm_lib_read1()
somtime get larger suddenly.
Therefore, I guess it showed as if there was much data,
so that the number of times of capturing data increases.

Is there any information about this phenomenon?

best regards,
g.f.