Per PCI Firmware Specification Revision 3.3 Table 4-7 _DSM Definitions for PCI. Preserve PCI Boot Configuration Initial Revision ID is 2. But the code is 1. Signed-off-by: Zhou Shengqing <zhoushengqing@xxxxxxxxxxx> --- drivers/pci/pci-acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index af370628e583..7a4cad0c1f00 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -132,7 +132,7 @@ bool pci_acpi_preserve_config(struct pci_host_bridge *host_bridge) */ obj = acpi_evaluate_dsm_typed(ACPI_HANDLE(&host_bridge->dev), &pci_acpi_dsm_guid, - 1, DSM_PCI_PRESERVE_BOOT_CONFIG, + 2, DSM_PCI_PRESERVE_BOOT_CONFIG, NULL, ACPI_TYPE_INTEGER); if (obj && obj->integer.value == 0) return true; -- 2.39.2
