diff options
Diffstat (limited to 'drivers/acpi/executer/exfield.c')
| -rw-r--r-- | drivers/acpi/executer/exfield.c | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/drivers/acpi/executer/exfield.c b/drivers/acpi/executer/exfield.c index da772cb91d7..aef8db82570 100644 --- a/drivers/acpi/executer/exfield.c +++ b/drivers/acpi/executer/exfield.c @@ -210,9 +210,7 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, { acpi_status status; u32 length; - u32 required_length; void *buffer; - void *new_buffer; union acpi_operand_object *buffer_desc; ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc); @@ -312,35 +310,6 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } - /* - * We must have a buffer that is at least as long as the field - * we are writing to. This is because individual fields are - * indivisible and partial writes are not supported -- as per - * the ACPI specification. - */ - new_buffer = NULL; - required_length = - ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length); - - if (length < required_length) { - - /* We need to create a new buffer */ - - new_buffer = ACPI_ALLOCATE_ZEROED(required_length); - if (!new_buffer) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* - * Copy the original data to the new buffer, starting - * at Byte zero. All unused (upper) bytes of the - * buffer will be 0. - */ - ACPI_MEMCPY((char *)new_buffer, (char *)buffer, length); - buffer = new_buffer; - length = required_length; - } - ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", source_desc, @@ -366,11 +335,5 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, status = acpi_ex_insert_into_field(obj_desc, buffer, length); acpi_ex_release_global_lock(obj_desc->common_field.field_flags); - /* Free temporary buffer if we used one */ - - if (new_buffer) { - ACPI_FREE(new_buffer); - } - return_ACPI_STATUS(status); } |