Messages in this thread | | | Date | Wed, 17 Mar 2010 11:43:54 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 1/2]: serial8250: Use native_io_delay on the x86 |
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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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