1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 3b489f8fc4cd..5a861440c122 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -542,7 +542,8 @@ enum survey_info_flags {
 /**
  * struct survey_info - channel survey response
  *
- * @channel: the channel this survey record reports, mandatory
+ * @channel: the channel this survey record reports, may be %NULL for a single
+ *      record to report global statistics
  * @filled: bitflag of flags from &enum survey_info_flags
  * @noise: channel noise in dBm. This and all following fields are
  *      optional