Re: [PATCH] PCI: disable auto realloc detection for lsi devices

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On Sat, Feb 7, 2015 at 1:12 PM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:

> It sounds like you think it's standard practice for BIOSes to disable
> and re-enable the link after programming BARs?  I'm not confident
> about that because I don't think there's anything in the spec that
> would suggest that.

That should be Firmware bug, it could save the BAR or bus info, and use them
to trap some operation from host.

I still remember that hotplug sometime does not with some LSI cards, as
firmware trap the pci conf access and not respond in time.
If I erase the firmware, the silicon always respond to host pci conf in time.

I think we can not say they violate the spec, but that is definitely not a good
practice of development.

Yinghai
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