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| author | Lv Zheng <lv.zheng@intel.com> | 2015-07-01 14:43:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:57 -0700 |
| commit | 1028665b14ba748b48046a1dfd97a828c01bb61c (patch) | |
| tree | a3c1d9850bdedd5a36a5c1302b06cf9535547146 | |
| parent | c9876d7419edb206d58db51440d616148b4d06c2 (diff) | |
| download | lwn-1028665b14ba748b48046a1dfd97a828c01bb61c.tar.gz lwn-1028665b14ba748b48046a1dfd97a828c01bb61c.zip | |
ACPICA: Tables: Fix an issue that FACS initialization is performed twice
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>
| -rw-r--r-- | drivers/acpi/acpica/utxfinit.c | 10 | ||||
| -rw-r--r-- | include/acpi/actypes.h | 1 |
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/acpi/acpica/utxfinit.c b/drivers/acpi/acpica/utxfinit.c index 246ef68681f4..2c3c578faa0a 100644 --- a/drivers/acpi/acpica/utxfinit.c +++ b/drivers/acpi/acpica/utxfinit.c @@ -175,10 +175,12 @@ acpi_status __init acpi_enable_subsystem(u32 flags) * 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 */ diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 8fc12f80b616..69afb5780815 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -561,6 +561,7 @@ 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 |