diff options
| -rw-r--r-- | drivers/acpi/acpica/tbutils.c | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index 801d1963d7d8..e37a103013a4 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -49,8 +49,6 @@ ACPI_MODULE_NAME("tbutils") /* Local prototypes */ -static acpi_status acpi_tb_validate_xsdt(acpi_physical_address address); - static acpi_physical_address acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size); @@ -251,87 +249,6 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) /******************************************************************************* * - * FUNCTION: acpi_tb_validate_xsdt - * - * PARAMETERS: address - Physical address of the XSDT (from RSDP) - * - * RETURN: Status. AE_OK if the table appears to be valid. - * - * DESCRIPTION: Validate an XSDT to ensure that it is of minimum size and does - * not contain any NULL entries. A problem that is seen in the - * field is that the XSDT exists, but is actually useless because - * of one or more (or all) NULL entries. - * - ******************************************************************************/ - -static acpi_status acpi_tb_validate_xsdt(acpi_physical_address xsdt_address) -{ - struct acpi_table_header *table; - u8 *next_entry; - acpi_physical_address address; - u32 length; - u32 entry_count; - acpi_status status; - u32 i; - - /* Get the XSDT length */ - - table = - acpi_os_map_memory(xsdt_address, sizeof(struct acpi_table_header)); - if (!table) { - return (AE_NO_MEMORY); - } - - length = table->length; - acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); - - /* - * Minimum XSDT length is the size of the standard ACPI header - * plus one physical address entry - */ - if (length < (sizeof(struct acpi_table_header) + ACPI_XSDT_ENTRY_SIZE)) { - return (AE_INVALID_TABLE_LENGTH); - } - - /* Map the entire XSDT */ - - table = acpi_os_map_memory(xsdt_address, length); - if (!table) { - return (AE_NO_MEMORY); - } - - /* Get the number of entries and pointer to first entry */ - - status = AE_OK; - next_entry = ACPI_ADD_PTR(u8, table, sizeof(struct acpi_table_header)); - entry_count = (u32)((table->length - sizeof(struct acpi_table_header)) / - ACPI_XSDT_ENTRY_SIZE); - - /* Validate each entry (physical address) within the XSDT */ - - for (i = 0; i < entry_count; i++) { - address = - acpi_tb_get_root_table_entry(next_entry, - ACPI_XSDT_ENTRY_SIZE); - if (!address) { - - /* Detected a NULL entry, XSDT is invalid */ - - status = AE_NULL_ENTRY; - break; - } - - next_entry += ACPI_XSDT_ENTRY_SIZE; - } - - /* Unmap table */ - - acpi_os_unmap_memory(table, length); - return (status); -} - -/******************************************************************************* - * * FUNCTION: acpi_tb_parse_root_table * * PARAMETERS: rsdp - Pointer to the RSDP @@ -355,7 +272,6 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) u32 table_count; struct acpi_table_header *table; acpi_physical_address address; - acpi_physical_address rsdt_address; u32 length; u8 *table_entry; acpi_status status; @@ -384,14 +300,11 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) * as per the ACPI specification. */ address = (acpi_physical_address) rsdp->xsdt_physical_address; - rsdt_address = - (acpi_physical_address) rsdp->rsdt_physical_address; table_entry_size = ACPI_XSDT_ENTRY_SIZE; } else { /* Root table is an RSDT (32-bit physical addresses) */ address = (acpi_physical_address) rsdp->rsdt_physical_address; - rsdt_address = address; table_entry_size = ACPI_RSDT_ENTRY_SIZE; } @@ -401,24 +314,6 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) */ acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); - /* - * If it is present and used, validate the XSDT for access/size - * and ensure that all table entries are at least non-NULL - */ - if (table_entry_size == ACPI_XSDT_ENTRY_SIZE) { - status = acpi_tb_validate_xsdt(address); - if (ACPI_FAILURE(status)) { - ACPI_BIOS_WARNING((AE_INFO, - "XSDT is invalid (%s), using RSDT", - acpi_format_exception(status))); - - /* Fall back to the RSDT */ - - address = rsdt_address; - table_entry_size = ACPI_RSDT_ENTRY_SIZE; - } - } - /* Map the RSDT/XSDT table header to get the full table length */ table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
