From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 4 Feb 2011 18:20:08 +0000 (+0100)
Subject: mac80211: do not send duplicate data frames to the cooked monitor interface
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b1f93314bfc4d5753391616735f6b8df96db901d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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 b37c3415f0ea..753ffc41c1aa 100644
--- 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;
 	}