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| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-05-24 13:23:52 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-06-04 12:08:06 -0500 |
| commit | e412d63d6025f5713d0e68e710ab5a99f9edc11b (patch) | |
| tree | 4bab573c61e54b9d9f23a7d25394c6b74c04f0b2 /drivers/pci/probe.c | |
| parent | PCI: Improve pci_scan_bridge() and pci_scan_bridge_extend() doc (diff) | |
| download | linux-dev-e412d63d6025f5713d0e68e710ab5a99f9edc11b.tar.xz linux-dev-e412d63d6025f5713d0e68e710ab5a99f9edc11b.zip | |
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>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index fe5b05bd1887..3100ede3a5bf 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1191,20 +1191,15 @@ static int pci_scan_bridge_extend(struct pci_bus *bus, struct pci_dev *dev, (is_cardbus ? "PCI CardBus %04x:%02x" : "PCI Bus %04x:%02x"), pci_domain_nr(bus), child->number); - /* Has only triggered on CardBus, fixup is in yenta_socket */ + /* Check that all devices are accessible */ while (bus->parent) { if ((child->busn_res.end > bus->busn_res.end) || (child->number > bus->busn_res.end) || (child->number < bus->number) || (child->busn_res.end < bus->number)) { - dev_info(&child->dev, "%pR %s hidden behind%s bridge %s %pR\n", - &child->busn_res, - (bus->number > child->busn_res.end && - bus->busn_res.end < child->number) ? - "wholly" : "partially", - bus->self->transparent ? " transparent" : "", - dev_name(&bus->dev), - &bus->busn_res); + dev_info(&dev->dev, "devices behind bridge are unusable because %pR cannot be assigned for them\n", + &child->busn_res); + break; } bus = bus->parent; } |