x86: Unnecessary I/O Resource Warnings on Some Machines (6573171)

On some machines, for example Sun V40z, and laptops, for example Acer Ferrari 5000, you might see warning messages about booting with I/O resources. These warnings indicate potential failure on hot-pluggable add operations on the slots displayed in the warning messages.

However, on some machines these warnings are inaccurate and invalid when hot-plugging is not supported on the displayed slots. Ignore the warnings when hot-plugging is not supported.

When hot-plugging is supported, the warnings are valid and you might experience a hot-pluggable operation failure on the specified bridge slots. These types of failures do not affect the current state or functionality of the system in any way.

The examples below show various warning messages that are displayed:

• 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

• 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

Workaround: None.