PCI: Improve "partially hidden behind bridge" log message
authorMika Westerberg <mika.westerberg@linux.intel.com>
Thu, 24 May 2018 18:23:52 +0000 (13:23 -0500)
committerBjorn Helgaas <bhelgaas@google.com>
Mon, 4 Jun 2018 17:08:06 +0000 (12:08 -0500)
commite412d63d6025f5713d0e68e710ab5a99f9edc11b
tree4bab573c61e54b9d9f23a7d25394c6b74c04f0b2
parent70f7880d2d3175cecc73b0b41fd07e58e6df5fff
PCI: Improve "partially hidden behind bridge" log message

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>
drivers/pci/probe.c