Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80I/O delay override.

From: Alan Cox
Date: Wed Jan 16 2008 - 15:11:30 EST


> If the hardware required an intermediate junk I/O, that would be a
> reason to do one, but it doesn't, does it? It requires a delay. It's
> written thus in all of the application notes.

And the only instruction that is synchronized to the bus in question is
an I/O instruction.

> Wrong again. Of course one knows how long the delay should be. The bus
> speed is known.

Wrong again. ISA bus speed is neither defined precisely, nor visible in a
system portable fashion.

I'm so glad you have nothing better to do than troll, if you
actually wrote code I'd be worried it might get into something people
used.

Alan
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