diff options
| author | Vidya Sagar <vidyas@nvidia.com> | 2024-05-08 20:41:35 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-06-04 00:13:38 +0300 |
| commit | 9d7d5db8e78ef1b67690bbffa5af60016d8e279d (patch) | |
| tree | f91265594f4d6f64f84b7c190aae0c76043f8909 /drivers/acpi/pci_root.c | |
| parent | 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 (diff) | |
| download | linux-9d7d5db8e78ef1b67690bbffa5af60016d8e279d.tar.xz | |
PCI: Move PRESERVE_BOOT_CONFIG _DSM evaluation to pci_register_host_bridge()
Move the PRESERVE_BOOT_CONFIG _DSM evaluation from acpi_pci_root_create()
to pci_register_host_bridge().
This will help unify the ACPI _DSM path and the DT-based
"linux,pci-probe-only" paths.
This should be safe because it happens earlier than it used to:
acpi_pci_root_create
pci_create_root_bus
pci_register_host_bridge
+ bridge->preserve_config = pci_preserve_config(bridge)
pci_acpi_preserve_config
+ acpi_evaluate_dsm_typed(DSM_PCI_PRESERVE_BOOT_CONFIG)
- acpi_evaluate_dsm_typed(DSM_PCI_PRESERVE_BOOT_CONFIG)
No functional change intended.
Link: https://lore.kernel.org/r/20240508174138.3630283-2-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 58b89b8d950e..ddc2b3e89111 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -1008,7 +1008,6 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, int node = acpi_get_node(device->handle); struct pci_bus *bus; struct pci_host_bridge *host_bridge; - union acpi_object *obj; info->root = root; info->bridge = device; @@ -1050,17 +1049,6 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, if (!(root->osc_ext_control_set & OSC_CXL_ERROR_REPORTING_CONTROL)) host_bridge->native_cxl_error = 0; - /* - * Evaluate the "PCI Boot Configuration" _DSM Function. If it - * exists and returns 0, we must preserve any PCI resource - * assignments made by firmware for this host bridge. - */ - obj = acpi_evaluate_dsm_typed(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_guid, 1, - DSM_PCI_PRESERVE_BOOT_CONFIG, NULL, ACPI_TYPE_INTEGER); - if (obj && obj->integer.value == 0) - host_bridge->preserve_config = 1; - ACPI_FREE(obj); - acpi_dev_power_up_children_with_adr(device); pci_scan_child_bus(bus); |