mac80211: add a comment about monitor-to-dev injection
Add a note with a use-case for the monitor-to-dev injection
mechanism in mac80211, reported by Ben Greear.
Change-Id: I6456997ef9bc40b24ede860b6ef2fed5af49cf44
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index db38be1..a53af8c 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2270,6 +2270,9 @@
* isn't always enough to find the interface to use; for proper
* VLAN/WDS support we will need a different mechanism (which
* likely isn't going to be monitor interfaces).
+ *
+ * This is necessary, for example, for old hostapd versions that
+ * don't use nl80211-based management TX/RX.
*/
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
