With wrong ECDT fixes reversed, it is able to put ECDT probing before
acpi_enable_subsystem().
But the ultimate purpose of ECDT re-enabling is to put the ECDT probing
before the namespace initialization (acpi_load_tables()). This patch
achieves this with protections so that we can enable it later when all
necessary corrections are upstreamed.
Signed-off-by: Lv Zheng <lv.zh...@intel.com>
Signed-off-by: Lv Zheng <lv.zh...@intel.com>
---
drivers/acpi/bus.c | 39 +++++++++++++++++++++++++--------------
1 file changed, 25 insertions(+), 14 deletions(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 891c42d..8752860 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -911,11 +911,13 @@ void __init acpi_early_init(void)
goto error0;
}
- status = acpi_load_tables();
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX
- "Unable to load the System Description Tables\n");
- goto error0;
+ if (acpi_gbl_group_module_level_code) {
+ status = acpi_load_tables();
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX
+ "Unable to load the System Description
Tables\n");
+ goto error0;
+ }
}
#ifdef CONFIG_X86
@@ -981,17 +983,10 @@ static int __init acpi_bus_init(void)
acpi_os_initialize1();
- status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX
- "Unable to start the ACPI Interpreter\n");
- goto error1;
- }
-
/*
* ACPI 2.0 requires the EC driver to be loaded and work before
- * the EC device is found in the namespace (i.e. before
acpi_initialize_objects()
- * is called).
+ * the EC device is found in the namespace (i.e. before
+ * acpi_load_tables() is called).
*
* This is accomplished by looking for the ECDT table, and getting
* the EC parameters out of that.
@@ -999,6 +994,22 @@ 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) {
+ status = acpi_load_tables();
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX
+ "Unable to load the System Description
Tables\n");
+ goto error1;
+ }
+ }
+
+ status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX
+ "Unable to start the ACPI Interpreter\n");
+ goto error1;
+ }
+
status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
--
1.7.10
