diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/executer/exconfig.c | 35 | ||||
| -rw-r--r-- | drivers/acpi/tables/tbinstal.c | 21 | ||||
| -rw-r--r-- | drivers/acpi/utilities/utdebug.c | 5 |
3 files changed, 43 insertions, 18 deletions
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c index 009aef5fcbf..8cc410ce920 100644 --- a/drivers/acpi/executer/exconfig.c +++ b/drivers/acpi/executer/exconfig.c @@ -285,16 +285,16 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, switch (ACPI_GET_OBJECT_TYPE(obj_desc)) { case ACPI_TYPE_REGION: + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n", + obj_desc, + acpi_ut_get_object_type_name(obj_desc))); + /* Region must be system_memory (from ACPI spec) */ if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) { return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n", - obj_desc, - acpi_ut_get_object_type_name(obj_desc))); - /* * If the Region Address and Length have not been previously evaluated, * evaluate them now and save the results. @@ -306,6 +306,11 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, } } + /* + * We will simply map the memory region for the table. However, the + * memory region is technically not guaranteed to remain stable and + * we may eventually have to copy the table to a local buffer. + */ table_desc.address = obj_desc->region.address; table_desc.length = obj_desc->region.length; table_desc.flags = ACPI_TABLE_ORIGIN_MAPPED; @@ -313,18 +318,23 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */ - /* Simply extract the buffer from the buffer object */ - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Buffer or Field %p %s\n", obj_desc, acpi_ut_get_object_type_name(obj_desc))); - table_desc.pointer = ACPI_CAST_PTR(struct acpi_table_header, - obj_desc->buffer.pointer); - table_desc.length = table_desc.pointer->length; - table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; + /* + * We need to copy the buffer since the original buffer could be + * changed or deleted in the future + */ + table_desc.pointer = ACPI_ALLOCATE(obj_desc->buffer.length); + if (!table_desc.pointer) { + return_ACPI_STATUS(AE_NO_MEMORY); + } - obj_desc->buffer.pointer = NULL; + ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer, + obj_desc->buffer.length); + table_desc.length = obj_desc->buffer.length; + table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; break; default: @@ -369,6 +379,9 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, cleanup: if (ACPI_FAILURE(status)) { + + /* Delete allocated buffer or mapping */ + acpi_tb_delete_table(&table_desc); } return_ACPI_STATUS(status); diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c index 3bc0c67a928..6a6ee1f06c7 100644 --- a/drivers/acpi/tables/tbinstal.c +++ b/drivers/acpi/tables/tbinstal.c @@ -125,13 +125,20 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, /* The table must be either an SSDT or a PSDT or an OEMx */ - if ((!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT)) - && - (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)) - && (strncmp(table_desc->pointer->signature, "OEM", 3))) { - ACPI_ERROR((AE_INFO, - "Table has invalid signature [%4.4s], must be SSDT, PSDT or OEMx", - table_desc->pointer->signature)); + if (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT)&& + !ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)&& + strncmp(table_desc->pointer->signature, "OEM", 3)) { + /* Check for a printable name */ + if (acpi_ut_valid_acpi_name( + *(u32 *) table_desc->pointer->signature)) { + ACPI_ERROR((AE_INFO, "Table has invalid signature " + "[%4.4s], must be SSDT or PSDT", + table_desc->pointer->signature)); + } else { + ACPI_ERROR((AE_INFO, "Table has invalid signature " + "(0x%8.8X), must be SSDT or PSDT", + *(u32 *) table_desc->pointer->signature)); + } return_ACPI_STATUS(AE_BAD_SIGNATURE); } diff --git a/drivers/acpi/utilities/utdebug.c b/drivers/acpi/utilities/utdebug.c index 7361204b1ee..a9148677f03 100644 --- a/drivers/acpi/utilities/utdebug.c +++ b/drivers/acpi/utilities/utdebug.c @@ -524,6 +524,11 @@ void acpi_ut_dump_buffer2(u8 * buffer, u32 count, u32 display) u32 temp32; u8 buf_char; + if (!buffer) { + acpi_os_printf("Null Buffer Pointer in DumpBuffer!\n"); + return; + } + if ((count < 4) || (count & 0x01)) { display = DB_BYTE_DISPLAY; } |