OpenWrt – Rev 4

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From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 23 Feb 2018 09:59:35 +0100
Subject: [PATCH] mac80211: drop frames with unexpected DS bits from
 fast-rx to slow path

Fixes rx for 4-addr packets in AP mode

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3928,7 +3928,7 @@ static bool ieee80211_invoke_fast_rx(str
        if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS |
                                              IEEE80211_FCTL_TODS)) !=
            fast_rx->expected_ds_bits)
-               goto drop;
+               return false;
 
        /* assign the key to drop unencrypted frames (later)
         * and strip the IV/MIC if necessary