From: Marcin Ślusarz <marcin.slusarz@xxxxxxxxx> Signed-off-by: Marcin Ślusarz <marcin.slusarz@xxxxxxxxx> --- drivers/acpi/acpica/nsxfeval.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c index f9d059647cc5..7149c8f70a6e 100644 --- a/drivers/acpi/acpica/nsxfeval.c +++ b/drivers/acpi/acpica/nsxfeval.c @@ -532,8 +532,8 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) * return_value - Location where return value of * user_function is put if terminated early * - * RETURNS Return value from the user_function if terminated early. - * Otherwise, returns NULL. + * RETURNS Returns status from the callback function if terminated early. + * Otherwise, returns a status of the walk, AE_OK if succeeded. * * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, * starting (and ending) at the object specified by start_handle. @@ -542,6 +542,11 @@ static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) * a non-zero value, the search is terminated immediately and this * value is returned to the caller. * + * Note that both the callback functions and the walk itself + * use overlapping return values (e.g. AE_OK), so user of this + * function can't rely only on the return value to tell if + * the callback function was called. + * * The point of this procedure is to provide a generic namespace * walk routine that can be called from multiple places to * provide multiple services; the callback function(s) can be -- 2.25.1
