@@ -417,11 +417,10 @@ static int validate_dsm(acpi_handle handle, const char *uuid, int rev, guid_t *d
int ret = -EINVAL;
guid_parse(uuid, dsm_guid);
- obj = acpi_evaluate_dsm(handle, dsm_guid, rev, 0, NULL);
/* Check if the _DSM is present and as expected. */
- if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length == 0 ||
- obj->buffer.length > sizeof(u32)) {
+ obj = acpi_evaluate_dsm_typed(handle, dsm_guid, rev, 0, NULL, ACPI_TYPE_BUFFER);
+ if (!obj || obj->buffer.length == 0 || obj->buffer.length > sizeof(u32)) {
acpi_handle_debug(handle,
"_DSM UUID %s rev %d function 0 evaluation failed\n", uuid, rev);
goto out;
The acpi_evaluate_dsm_typed() provides a way to check the type of the object evaluated by _DSM call. Use it instead of open coded variant. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/acpi/x86/s2idle.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)