Re: [PATCH] x86/pci: try to detect host_bridge pci_cfg_space

[H. Peter Anvin]

Yinghai Lu wrote:
> Impact: get correct pci_cfg_size for host_bridge
>
> more host bridges support 4k cfg, so check them directly
> instead of quirks.
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>

I'm utterly confused by this.  This is basically saying we should try to 
probe for an extended device space for every host bridge.  Logically 
speaking, this is valid: if there is a valid path by which we can probe 
for byte 256 then it should succeed.

HOWEVER, the same argument applies for *every single device*.  So if 
this does indeed work, why should we limit it to host bridges?

	-hpa
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