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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2020-06-19 09:20:05 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2020-07-28 15:51:31 +0100
commit3a3d208beede7ae03f8c80bed01f47d6b98d4ceb (patch)
tree1991f2eee1971fa814a01a194fe93d7169166e2f /drivers/acpi/arm64
parent39c3cf566ceafa7c1ae331a5f26fbb685d670001 (diff)
ACPI/IORT: Remove useless PCI bus walk
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@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Hanjun Guo <guohanjun@huawei.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Link: https://lore.kernel.org/r/20200619082013.13661-5-lorenzo.pieralisi@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/acpi/arm64')
-rw-r--r--drivers/acpi/arm64/iort.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 53f9ef515089..421c6976ab81 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -558,10 +558,7 @@ 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);