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-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 a3d148e4d39f..4eab4f5a1004 100644
--- a/drivers/acpi/events/evxfevnt.c
+++ b/drivers/acpi/events/evxfevnt.c
@@ -65,6 +65,14 @@ acpi_status acpi_enable(void)
65 65
66 ACPI_FUNCTION_TRACE(acpi_enable); 66 ACPI_FUNCTION_TRACE(acpi_enable);
67 67
68 /* ACPI tables must be present */
69
70 if (!acpi_tb_tables_loaded()) {
71 return_ACPI_STATUS(AE_NO_ACPI_TABLES);
72 }
73
74 /* Check current mode */
75
68 if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { 76 if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
69 ACPI_DEBUG_PRINT((ACPI_DB_INIT, 77 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
70 "System is already in ACPI mode\n")); 78 "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,
54 54
55/******************************************************************************* 55/*******************************************************************************
56 * 56 *
57 * FUNCTION: acpi_tb_tables_loaded
58 *
59 * PARAMETERS: None
60 *
61 * RETURN: TRUE if required ACPI tables are loaded
62 *
63 * DESCRIPTION: Determine if the minimum required ACPI tables are present
64 * (FADT, FACS, DSDT)
65 *
66 ******************************************************************************/
67
68u8 acpi_tb_tables_loaded(void)
69{
70
71 if (acpi_gbl_root_table_list.count >= 3) {
72 return (TRUE);
73 }
74
75 return (FALSE);
76}
77
78/*******************************************************************************
79 *
57 * FUNCTION: acpi_tb_print_table_header 80 * FUNCTION: acpi_tb_print_table_header
58 * 81 *
59 * PARAMETERS: Address - Table physical address 82 * PARAMETERS: Address - Table physical address