[PATCH v5 3/5] ACPI 2.0 / AML: Enable correct ACPI subsystem initialization order for new table loading mode

From: Lv Zheng
Date: Thu Sep 22 2016 - 23:27:02 EST


This patch enables the following initialization order for the new table
loading mode (which is enabled by setting
acpi_gbl_parse_table_as_term_list to TRUE):
1. Install default region handlers (SystemMemory, SystemIo, PciConfig,
EmbeddedControl via ECDT) without evaluating _REG;
2. Load the table and execute the module level AML opcodes instantly.

Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
---
drivers/acpi/bus.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 85b7d07..658b4c4 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -985,7 +985,8 @@ void __init acpi_early_init(void)
goto error0;
}

- if (acpi_gbl_group_module_level_code) {
+ if (!acpi_gbl_parse_table_as_term_list &&
+ acpi_gbl_group_module_level_code) {
status = acpi_load_tables();
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX
@@ -1074,7 +1075,8 @@ static int __init acpi_bus_init(void)
status = acpi_ec_ecdt_probe();
/* Ignore result. Not having an ECDT is not fatal. */

- if (!acpi_gbl_group_module_level_code) {
+ if (acpi_gbl_parse_table_as_term_list ||
+ !acpi_gbl_group_module_level_code) {
status = acpi_load_tables();
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX
--
1.7.10