Re: Intel ICH programming & ALSA driver

["Clemens Ladisch" <cladisch@fastmail.net>]

Thomas Witzel wrote:
> On Monday 13 November 2006 08:51, you wrote:
> > I don't think it's a good idea to reset the DMA when _any_ interrupt
> > occurs; this could be too early.  You could just wait for it to halt by
> > itself when the last buffer entry is reached, and reset the DMA when the
> > device is closed.
> 
> Without this it would get me about 100000 interrupts in just a few seconds 
> telling me that it has finished.

Apparently, the interrupt handler is supposed to either add more valid
buffers or to stop the DMA.

I think the appropriate thing to do is top stop (not reset) the DMA when
the end-of-list bit has been set, but not at the first interrupt (that
will occur after the first buffer has been fetched).


HTH
Clemens

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