Bjorn Helgaas d739a099d0
PCI: Don't add disabled subtractive decode bus resources ...
For a subtractive decode bridge, we previously added and printed all
resources of the primary bus, even if they were not valid. In the example
below, the bridge 00:1c.3 has no windows enabled, so there are no valid
resources on bus 02. But since 02:00.0 is subtractive decode bridge, we
add and print all those invalid resources, which don't really make sense:
pci 0000:00:1c.3: PCI bridge to [bus 02-03]
pci 0000:02:00.0: PCI bridge to [bus 03] (subtractive decode)
pci 0000:02:00.0: bridge window [??? 0x00000000 flags 0x0] (subtractive decode)
Add and print the subtractively-decoded resources only if they are valid.
There's an example in the dmesg log attached to the bugzilla below (but
this patch doesn't fix the bug reported there).
Link: https://bugzilla.kernel.org/show_bug.cgi?id=73141
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com >
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d739a099d0