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Description
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The fix for 6414722 resulted in systems such as the V40z, with empty SHPC capable PCI-X bridges which the bios does not configure, producing warning messages like:
WARNING: out of I/O resources on bridge: bus 0x20, dev 0x3, func 0x0, for secondary bus 0x23
WARNING: devices under bridge bus 0x20, dev 0x3, func 0x0 will not be assigned I/O ports
They are actually harmless since we do not support hotplugging on such bridges anyways.
Michael also reports I/O resource warnings of different kind on his Acer Ferrari 5000:
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Date: Mon, 09 Jul 2007 13:26:19 -0700
Subject: issues with F5k and Nevada build 68
Hi all,
[.. snip ..]
2) since upgrading, I get this every time I reboot:
WARNING: detected unsupported configuration: non-empty bridge (bus 0x0
dev 0x7 func 0x0) without I/O resources assigned by bios for secondary bus 0x7
WARNING: devices under bus 0x0, dev 0x7, func 0x0 will not be assigned
I/O ports
[.. snip ..]
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The cause is that an internal RD580 pcie bus, which has a fixed child of an Atheros nic, implements hotplug but that bus itself is not physically hotpluggable. Since the Atheros nic does not use I/O space, the bios does not bother to configure the bridge with I/O. The warning itself is actually legit in this case, but because the bridge in question cannot actually have its Atheros child hotswapped out for another device that could potentially use I/O resources, the warning does not indicate anything detrimental.
This is showing up on my Sony VAIO SZ series notebook specifically, but is also popping up on a variety of other systems as well...
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