On Wed, Jan 30, 2002 at 01:27:29PM -0600, Kent E Yoder wrote:
> I think the delays in the driver *were* just working around PCI posting
> effects. I tested by removing all the delays and instead putting
> something like:
> writew(val, addr);
> (void) read(addr);
>
> instead, to flush the PCI cache. Things seem to be happy.
>
> Is this the best way to make sure the PCI cache is flushed for writes that
> need to happen immediately? I don't see many other drivers doing it...
Wouldn't creating a flush_and_writew() or similar be an idea here?
/David Weinehall
_ _
// David Weinehall <tao@acc.umu.se> /> Northern lights wander \\
// Maintainer of the v2.0 kernel // Dance across the winter sky //
\> http://www.acc.umu.se/~tao/ </ Full colour fire </
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Jan 31 2002 - 21:01:23 EST