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Re: [ath5k-devel] [PATCH] ath5k/ath9k: Fix 64 bits TSF reads

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On Fri, 2010-04-16 at 00:07 +0200, Benoit Papillault wrote:

> It follows the logic mentionned by Derek, with only 2 register reads
> needed at each additional steps instead of 3 (the minimum number of
> register reads is still 3).

I would prefer an approach whereas tsf_upper2 or tsf_upper1 is chosen
based on whether tsf_lower is more or less than 0x80000000 if
(tsf_upper2 - tsf_upper1) is 1.  If the difference is not 0 or 1, either
the hardware is broken or the kernel was stuck for so long (71 minutes!)
that getting the exact tsf should be the least worry.  That's when
WARN_ON would be appropriate.

The problem with overengineered code is that it doesn't break when it's
better to break and expose the problem :-)

But it's just a suggestion, not a NACK.  It's better to have some fix
than no fix at all.
 
-- 
Regards,
Pavel Roskin
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