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 <[email protected]> --- drivers/pci/probe.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 78caade..cf05b3e 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) { -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
