PCI: Improve "partially hidden behind bridge" log message

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pci_scan_child_bus_extend() complains when we assign an unreachable
secondary bus number to a bridge.  For example, given the topology below:

  +-1b.0-[01-39]----00.0-[02-3a]--+-00.0-[03]----00.0
                                  +-01.0-[04-39]--
                                  \-02.0-[3a]----00.0

it logs the following messages:

  pci_bus 0000:3a: [bus 3a] partially hidden behind bridge 0000:02 [bus 02-39]
  pci_bus 0000:3a: [bus 3a] partially hidden behind bridge 0000:01 [bus 01-39]

These messages are incorrect (0000:02 is a bus, not a bridge) and
confusing.  Make the message more understandable:

  pci 0000:02:02.0: devices behind bridge are unusable because [bus 3a] cannot be assigned for them

Also, remove the reference to CardBus, because this issue affects all
varieties of PCI, not just CardBus.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

...

This commit is contained in:

Mika Westerberg 2018-05-24 13:23:52 -05:00 • committed by Bjorn Helgaas

parent 70f7880d2d

commit e412d63d60

1 changed files with 4 additions and 9 deletions

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drivers/pci/probe.c

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