The PCI bus domain number (used in the iort_match_node_callback() - pci_domain_nr() call) is cascaded through the PCI bus hierarchy at PCI bus enumeration time, therefore there is no need in iort_find_dev_node() to walk the PCI bus upwards to grab the root bus to be passed to iort_scan_node(), the device->bus PCI bus pointer will do. Remove this useless code. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Hanjun Guo <guohanjun@xxxxxxxxxx> Cc: Sudeep Holla <sudeep.holla@xxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Robin Murphy <robin.murphy@xxxxxxx> Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx> --- drivers/acpi/arm64/iort.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index f346a785e0b5..ae9e1089d954 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -575,10 +575,7 @@ static struct acpi_iort_node *iort_find_dev_node(struct device *dev) iort_match_node_callback, dev); } - /* Find a PCI root bus */ pbus = to_pci_dev(dev)->bus; - while (!pci_is_root_bus(pbus)) - pbus = pbus->parent; return iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, iort_match_node_callback, &pbus->dev); -- 2.26.1
