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| author | Bjorn Helgaas <bhelgaas@google.com> | 2014-04-14 16:10:54 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-05-23 10:47:20 -0600 |
| commit | d739a099d0248c78d374b1b610cdb679c7bc052d (patch) | |
| tree | 38d4500d5783c4d8f2a905347e65eb995245706e /drivers/pci/probe.c | |
| parent | 26370fc6647b63eefb85a675382d661d0fed30a1 (diff) | |
| download | blackbird-op-linux-d739a099d0248c78d374b1b610cdb679c7bc052d.tar.gz blackbird-op-linux-d739a099d0248c78d374b1b610cdb679c7bc052d.zip | |
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>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 3bc149b848a8..966514010974 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -475,7 +475,7 @@ void pci_read_bridge_bases(struct pci_bus *child) if (dev->transparent) { pci_bus_for_each_resource(child->parent, res, i) { - if (res) { + if (res && res->flags) { pci_bus_add_resource(child, res, PCI_SUBTRACTIVE_DECODE); dev_printk(KERN_DEBUG, &dev->dev, |
