diff options
Diffstat (limited to 'drivers/pci/hotplug/acpi_pcihp.c')
| -rw-r--r-- | drivers/pci/hotplug/acpi_pcihp.c | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c index c9816166978e..65cc5042489a 100644 --- a/drivers/pci/hotplug/acpi_pcihp.c +++ b/drivers/pci/hotplug/acpi_pcihp.c @@ -69,16 +69,12 @@ static acpi_status acpi_run_oshp(acpi_handle handle) */ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags) { + const struct pci_host_bridge *host; + const struct acpi_pci_root *root; acpi_status status; acpi_handle chandle, handle; struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; - flags &= OSC_PCI_SHPC_NATIVE_HP_CONTROL; - if (!flags) { - err("Invalid flags %u specified!\n", flags); - return -EINVAL; - } - /* * Per PCI firmware specification, we should run the ACPI _OSC * method to get control of hotplug hardware before using it. If @@ -88,19 +84,14 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags) * OSHP within the scope of the hotplug controller and its parents, * up to the host bridge under which this controller exists. */ - handle = acpi_find_root_bridge_handle(pdev); - if (handle) { - acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); - dbg("Trying to get hotplug control for %s\n", - (char *)string.pointer); - status = acpi_pci_osc_control_set(handle, &flags, flags); - if (ACPI_SUCCESS(status)) - goto got_one; - if (status == AE_SUPPORT) - goto no_control; - kfree(string.pointer); - string = (struct acpi_buffer){ ACPI_ALLOCATE_BUFFER, NULL }; - } + host = pci_find_host_bridge(pdev->bus); + if (host->native_shpc_hotplug) + return 0; + + /* If _OSC exists, we should not evaluate OSHP */ + root = acpi_pci_find_root(ACPI_HANDLE(&host->dev)); + if (root->osc_support_set) + goto no_control; handle = ACPI_HANDLE(&pdev->dev); if (!handle) { |