mac80211: do not send duplicate data frames to the cooked monitor interface

I can't think of a valid use case for this aside from debugging (which can
also be done with a real monitor interface), and dropping these frames saves
some precious CPU cycles.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index b37c3415f0ea20df88189881df55802027e9172d..753ffc41c1aa948682214161dd089fe020ceb3b7 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -815,7 +815,7 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
                                rx->local->dot11FrameDuplicateCount++;
                                rx->sta->num_duplicates++;
                        }
-                       return RX_DROP_MONITOR;
+                       return RX_DROP_UNUSABLE;
                } else
                        rx->sta->last_seq_ctrl[rx->queue] = hdr->seq_ctrl;
        }