Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

[Pavel Machek <pavel@ucw.cz>]

On Fri 2007-12-14 15:33:28, Ingo Molnar wrote:
> 
> * Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> 
> > There is another reason we can't just do a dumb changeover - two 
> > actually
> > 
> > #1: Some drivers are using inb_p/outb_p in PCI cases which are going 
> > #to cause PCI posting changes. Most are probably just wrong in the 
> > #first place but they need hand checking
> 
> hm, any intelligent way to force PCI posting? I guess not.
> 
> here's a list of candidate drivers (match the out*_p() pattern and do 
> pci)
> 
> ./char/epca.c 
> ./char/sonypi.c
> ./scsi/megaraid.c
> ./ide/pci/serverworks.c
> ./ide/pci/cmd640.c
> ./input/mouse/pc110pad.c

/*
 * We try to avoid enabling the hardware if it's not
 * there, but we don't know how to test. But we do know
 * that the PC110 is not a PCI system. So if we find any
 * PCI devices in the machine, we don't have a PC110.
 */

...so pc110 _may_ be okay.
								Pavel

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