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authorJohannes Berg <johannes.berg@intel.com>2019-11-22 12:42:42 +0100
committerJohannes Berg <johannes.berg@intel.com>2019-11-22 12:42:42 +0100
commitb226a826d83d66806fae20fc3518dace8b86bacb (patch)
treeba3ef48ab5cf8305cae22a605a8667ea3c477393 /net/mac80211
parent13baf667fa8e23aed12516776de6e50f7617820a (diff)
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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>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/tx.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index db38be1b75fa..a53af8cd3756 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2270,6 +2270,9 @@ netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
* 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);