acpi/acpica/utalloc.c

186 	char buffer[7];
189 		strcpy(buffer, "MEMORY");
190 		(void)acpi_db_display_statistics(buffer);
242  * PARAMETERS:  buffer              - Buffer descriptor to be validated
250 acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer)
255 	if (!buffer) {
261 	if ((buffer->length == ACPI_NO_BUFFER) ||
262 	    (buffer->length == ACPI_ALLOCATE_BUFFER) ||
263 	    (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
267 	/* Length is valid, the buffer pointer must be also */
269 	if (!buffer->pointer) {
280  * PARAMETERS:  buffer              - Buffer to be validated
285  * DESCRIPTION: Validate that the buffer is of the required length or
286  *              allocate a new buffer. Returned buffer is always zeroed.
291 acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length)
297 	if (!buffer || !required_length) {
303 	 * input actual length and set the output required buffer length.
305 	input_buffer_length = buffer->length;
306 	buffer->length = required_length;
309 	 * The input buffer length contains the actual buffer length, or the type
310 	 * of buffer to be allocated by this routine.
315 		/* Return the exception (and the required buffer length) */
321 		 * Allocate a new buffer. We directectly call acpi_os_allocate here to
325 		 * buffer created via ACPI_ALLOCATE_BUFFER.
327 		buffer->pointer = acpi_os_allocate(required_length);
332 		/* Allocate a new buffer with local interface to allow tracking */
334 		buffer->pointer = ACPI_ALLOCATE(required_length);
339 		/* Existing buffer: Validate the size of the buffer */
347 	/* Validate allocation from above or input buffer pointer */
349 	if (!buffer->pointer) {
353 	/* Have a valid buffer, clear it */
355 	memset(buffer->pointer, 0, required_length);