Greg KH wrote:
On Tue, May 18, 2010 at 11:49:55AM -0500, Praveen Kalamegham wrote:
Why is this check needed?
Because the PCI hotplug spec says that this is the "rule". No PCI
hotplugging is allowed for video devices due to the wierd BIOS issues
involved in setting up a large number of video devices.
Thanks for the quick reply. I looked through the PCI spec (3.0), PCI
Hotplug spec (1.1), or PCIe spec (2.1) but could not find any reference
to this rule. Could you point me in the right direction? And to be
clear, I'm only talking about PCIe hotplug, not PCI (probably not
relevant to the BIOS issue you referred to but mentioning just to be
sure). Since these are computational GPU devices, I wouldn't think they
would suffer from the same BIOS issues but not knowing the specifics,
I'm merely guessing.
Patches are always welcome :)
I'd be happy to but I'd like to understand the above issue before
submitting one to make sure my fix still makes sense.
Hope this helps,
Helps a lot, thanks,
Praveen
greg k-h
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