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authorBob Moore <robert.moore@intel.com>2007-02-02 19:48:23 +0300
committerLen Brown <len.brown@intel.com>2007-02-02 21:14:30 -0500
commitc857303ad496e1f52955e95994a67869882e89f9 (patch)
treef08011d43627bc7fc401253b5f8446bab708d87d /drivers/acpi
parent987c21a0b0081d480ec3cd04875509cdc10e15e7 (diff)
downloadop-kernel-dev-c857303ad496e1f52955e95994a67869882e89f9.zip
op-kernel-dev-c857303ad496e1f52955e95994a67869882e89f9.tar.gz
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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/events/evxfevnt.c8
-rw-r--r--drivers/acpi/tables/tbutils.c23
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
index a3d148e..4eab4f5 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 0cb7439..0874ab2 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
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