On Fri, 2006-10-13 at 18:09 +0100, Alan Cox wrote:
> Ar Gwe, 2006-10-13 am 12:34 -0400, ysgrifennodd Adam Belay:
> > I agree this needs to be fixed. However, as I previously mentioned,
> > this isn't the right place to attack the problem. Remember, this wasn't
> > originally a kernel regression. Rather it's a workaround for a known
>
> It's a kernel regression. It used to be reliable to read X resource
> addresses at any time.
Not true, reading these registers during a BIST has always been a
problem.
>
> > Finally, it's worth noting that this issue is really a corner-case, and
> > in most systems it's extremely rare that even incorrect userspace apps
> > would have any issue.
>
> Except just occasionally and randomly in the field, probably almost
> undebuggable and irreproducable - the very worst conceivable kind of
> bug.
>
Which is why returning an error code during device transitions is a
reasonable compromise between correctness and practicality.
-Adam
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