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

H. Peter Anvin
2009-03-07T00:58:38Z

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@kernel.org>

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