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SubjectRe: [PATCH 1/2]: serial8250: Use native_io_delay on the x86
On 03/17/2010 11:36 AM, Alan Cox wrote:
>
> You just need a write to something on the ISA bus which is 'safe' so that
> you don't end up reading back what you wrote to an non-existant port as
> some old chipsets will return the last ISA result when you do this rather
> than 0xff.

Ah... floating bus syndrome. So how about writing 0xff to the SCR
register in the same register range?

-hpa


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