diff options
| author | Vidya Sagar <vidyas@nvidia.com> | 2024-05-08 23:11:38 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-06-03 16:18:13 -0500 |
| commit | 7246a4520b4bf1494d7d030166a11b5226f6d508 (patch) | |
| tree | 3d1946cb51710ea55ab68fb87976f25ecfb7a762 | |
| parent | 1e6922482cd429e568537f8f6cf159765b5d176f (diff) | |
PCI: Use preserve_config in place of pci_flags
Use preserve_config in place of checking for PCI_PROBE_ONLY flag to enable
support for "linux,pci-probe-only" on a per host bridge basis.
This also obviates the use of adding PCI_REASSIGN_ALL_BUS flag if
!PCI_PROBE_ONLY, as pci_assign_unassigned_root_bus_resources() takes care
of reassigning the resources that are not already claimed.
Link: https://lore.kernel.org/r/20240508174138.3630283-5-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | drivers/pci/controller/pci-host-common.c | 4 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 20 |
2 files changed, 9 insertions, 15 deletions
diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c index 45b71806182d..c96b2de163b5 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -73,10 +73,6 @@ int pci_host_common_probe(struct platform_device *pdev) if (IS_ERR(cfg)) return PTR_ERR(cfg); - /* Do not reassign resources if probe only */ - if (!pci_has_flag(PCI_PROBE_ONLY)) - pci_add_flags(PCI_REASSIGN_ALL_BUS); - bridge->sysdata = cfg; bridge->ops = (struct pci_ops *)&ops->pci_ops; bridge->msi_domain = true; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8786d2c1a0bd..20475ca30505 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -3094,20 +3094,18 @@ int pci_host_probe(struct pci_host_bridge *bridge) bus = bridge->bus; + /* If we must preserve the resource configuration, claim now */ + if (bridge->preserve_config) + pci_bus_claim_resources(bus); + /* - * We insert PCI resources into the iomem_resource and - * ioport_resource trees in either pci_bus_claim_resources() - * or pci_bus_assign_resources(). + * Assign whatever was left unassigned. If we didn't claim above, + * this will reassign everything. */ - if (pci_has_flag(PCI_PROBE_ONLY)) { - pci_bus_claim_resources(bus); - } else { - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); + pci_assign_unassigned_root_bus_resources(bus); - list_for_each_entry(child, &bus->children, node) - pcie_bus_configure_settings(child); - } + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child); pci_bus_add_devices(bus); return 0; |