diff options
| author | Bob Moore <robert.moore@intel.com> | 2007-02-02 19:48:23 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-02 21:14:30 -0500 |
| commit | c857303ad496e1f52955e95994a67869882e89f9 (patch) | |
| tree | f08011d43627bc7fc401253b5f8446bab708d87d | |
| parent | 987c21a0b0081d480ec3cd04875509cdc10e15e7 (diff) | |
| download | linux-c857303ad496e1f52955e95994a67869882e89f9.tar.bz2 | |
ACPICA: Fail AcpiEnable if ACPI tables not loaded.
AcpiEnable will now fail if all of the required ACPI tables are not
loaded (FADT, FACS, DSDT). BZ 477
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/events/evxfevnt.c | 8 | ||||
| -rw-r--r-- | drivers/acpi/tables/tbutils.c | 23 | ||||
| -rw-r--r-- | include/acpi/actables.h | 2 |
3 files changed, 33 insertions, 0 deletions
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c index a3d148e4d39f..4eab4f5a1004 100644 --- a/drivers/acpi/events/evxfevnt.c +++ b/drivers/acpi/events/evxfevnt.c @@ -65,6 +65,14 @@ acpi_status acpi_enable(void) ACPI_FUNCTION_TRACE(acpi_enable); + /* ACPI tables must be present */ + + if (!acpi_tb_tables_loaded()) { + return_ACPI_STATUS(AE_NO_ACPI_TABLES); + } + + /* Check current mode */ + if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { ACPI_DEBUG_PRINT((ACPI_DB_INIT, "System is already in ACPI mode\n")); diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c index 0cb743962faf..0874ab299784 100644 --- a/drivers/acpi/tables/tbutils.c +++ b/drivers/acpi/tables/tbutils.c @@ -54,6 +54,29 @@ acpi_tb_get_root_table_entry(u8 * table_entry, /******************************************************************************* * + * FUNCTION: acpi_tb_tables_loaded + * + * PARAMETERS: None + * + * RETURN: TRUE if required ACPI tables are loaded + * + * DESCRIPTION: Determine if the minimum required ACPI tables are present + * (FADT, FACS, DSDT) + * + ******************************************************************************/ + +u8 acpi_tb_tables_loaded(void) +{ + + if (acpi_gbl_root_table_list.count >= 3) { + return (TRUE); + } + + return (FALSE); +} + +/******************************************************************************* + * * FUNCTION: acpi_tb_print_table_header * * PARAMETERS: Address - Table physical address diff --git a/include/acpi/actables.h b/include/acpi/actables.h index 5ef1b6939370..e7efb8a03a9c 100644 --- a/include/acpi/actables.h +++ b/include/acpi/actables.h @@ -97,6 +97,8 @@ void acpi_tb_set_table_loaded_flag(acpi_native_uint table_index, u8 is_loaded); /* * tbutils - table manager utilities */ +u8 acpi_tb_tables_loaded(void); + void acpi_tb_print_table_header(acpi_physical_address address, struct acpi_table_header *header); |