Re: [PATCH] x86: use explicit timing delay for pit accesses in kerneland pcspkr driver

[H. Peter Anvin]

Rene Herman wrote:
> Yes, but generally not any P5+ system is going to need the PIT delay in 
> the first place meaning it just doesn't matter. There were the VIA 
> issues with the PIC but unless I missed it not with the PIT.

Uhm, I'm not sure I believe that's safe.

The PIT is particularly pissy in this case -- the semantics of the PIT 
are ill-defined if there hasn't been a PIT clock between two adjacent 
accesses, so I fully expect that there are chipsets out there which will 
do very bad things in this case.

	-hpa
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