diff options
| author | Andreas Noever <andreas.noever@gmail.com> | 2014-01-23 21:59:22 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-02-10 17:11:15 -0700 |
| commit | 2ed8582341f651ca14d00ab0ada4b46f493e1fcb (patch) | |
| tree | 492cadcafe0e11cd43b2eb82ad348c59bf492bfb /drivers/pci/probe.c | |
| parent | 9a4d7d87197e3ff9138981e196aa5021d13a51a8 (diff) | |
PCI: Clarify the "scan anyway" comment in pci_scan_bridge()
Initially when we encountered a bus that was already present we skipped
it. Since 74710ded8e16 'PCI: always scan child buses' we continue
scanning in order to allow user triggered rescans of already existing
busses.
The old comment suggested that the reason for continuing the scan is a
bug in the i450NX chipset. This is not the case.
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 | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index f340c947d8cb..511a8f6d7636 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -805,11 +805,10 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) goto out; /* - * If we already got to this bus through a different bridge, - * don't re-add it. This can happen with the i450NX chipset. - * - * However, we continue to descend down the hierarchy and - * scan remaining child buses. + * The bus might already exist for two reasons: Either we are + * rescanning the bus or the bus is reachable through more than + * one bridge. The second case can happen with the i450NX + * chipset. */ child = pci_find_bus(pci_domain_nr(bus), secondary); if (!child) { |