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| author | Andreas Noever <andreas.noever@gmail.com> | 2014-01-23 20:59:21 (GMT) |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-02-10 23:50:49 (GMT) |
| commit | 9a4d7d87197e3ff9138981e196aa5021d13a51a8 (patch) | |
| tree | d2cd45ba70567f351ae465322d4844905d181296 /drivers/pci/probe.c | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
| download | linux-9a4d7d87197e3ff9138981e196aa5021d13a51a8.tar.xz | |
PCI: Increment max correctly in pci_scan_bridge()
This patch fixes two small issues:
- If pci_add_new_bus() fails, max must not be incremented. Otherwise
an incorrect value is returned from pci_scan_bridge().
- If the bus is already present, max must be incremented. I think
that this case should only be hit if we trigger a manual rescan of a
CardBus bridge.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 6e34498..f340c947 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -852,11 +852,12 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) * this case we only re-scan this bus. */ child = pci_find_bus(pci_domain_nr(bus), max+1); if (!child) { - child = pci_add_new_bus(bus, dev, ++max); + child = pci_add_new_bus(bus, dev, max+1); if (!child) goto out; - pci_bus_insert_busn_res(child, max, 0xff); + pci_bus_insert_busn_res(child, max+1, 0xff); } + max++; buses = (buses & 0xff000000) | ((unsigned int)(child->primary) << 0) | ((unsigned int)(child->busn_res.start) << 8) |