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Subject[PATCH 4.1 210/267] ACPICA: Tables: Fix an issue that FACS initialization is performed twice
Date
4.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lv Zheng <lv.zheng@intel.com>

commit c04be18448355441a0c424362df65b6422e27bda upstream.

ACPICA commit 90f5332a15e9d9ba83831ca700b2b9f708274658

This patch adds a new FACS initialization flag for acpi_tb_initialize().
acpi_enable_subsystem() might be invoked several times in OS bootup process,
and we don't want FACS initialization to be invoked twice. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/90f5332a
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/acpi/acpica/utxfinit.c | 10 ++++++----
include/acpi/actypes.h | 1 +
2 files changed, 7 insertions(+), 4 deletions(-)

--- a/drivers/acpi/acpica/utxfinit.c
+++ b/drivers/acpi/acpica/utxfinit.c
@@ -179,10 +179,12 @@ acpi_status __init acpi_enable_subsystem
* Obtain a permanent mapping for the FACS. This is required for the
* Global Lock and the Firmware Waking Vector
*/
- status = acpi_tb_initialize_facs();
- if (ACPI_FAILURE(status)) {
- ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
- return_ACPI_STATUS(status);
+ if (!(flags & ACPI_NO_FACS_INIT)) {
+ status = acpi_tb_initialize_facs();
+ if (ACPI_FAILURE(status)) {
+ ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
+ return_ACPI_STATUS(status);
+ }
}
#endif /* !ACPI_REDUCED_HARDWARE */

--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -572,6 +572,7 @@ typedef u64 acpi_integer;
#define ACPI_NO_ACPI_ENABLE 0x10
#define ACPI_NO_DEVICE_INIT 0x20
#define ACPI_NO_OBJECT_INIT 0x40
+#define ACPI_NO_FACS_INIT 0x80

/*
* Initialization state



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