Re: PCI Express support for 2.4 kernel

[Jeff Garzik]

Arjan van de Ven wrote:
> On Tue, 2003-12-16 at 18:10, Jeff Garzik wrote:
> > This is going to choke some hardware, I guarantee.
> > You always want to make sure your flush is of the same size at the 
> > write.  Reading a byte from an address that the hardware defines as 
> > "32-bit writes only" can get ugly real quick ;-)
>
>
> also reading back addr might not be the best choice in case some
> registers have side effects on reading, it's probably better to read
> back an address that is known to be ok to read (like the vendor ID
> field)


Hum.  Never seen this in a PCI config register, but it's certainly 
possible...  good point.

	Jeff



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