mac80211: Fix drop_unencrypted for MFP with hwaccel

Commit bef5d1c70d132145c0fc75b3586a19841a9a82e4 split
ieee80211_drop_unencrypted() into separate functions that are used for
Data and Management frames. However, it did not handle the
RX_FLAG_DECRYPTED correctly for Management frames:
ieee80211_drop_unencrypted() can only return 0 for Management frames,
so there is no point in calling it here. Instead, just check the
status->flag directly.

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index ea71e1a..14366d4 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1408,12 +1408,15 @@ static int
 ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
 {
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+       struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
        __le16 fc = hdr->frame_control;
-       int res;
 
-       res = ieee80211_drop_unencrypted(rx, fc);
-       if (unlikely(res))
-               return res;
+       /*
+        * Pass through unencrypted frames if the hardware has
+        * decrypted them already.
+        */
+       if (status->flag & RX_FLAG_DECRYPTED)
+               return 0;
 
        if (rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP)) {
                if (unlikely(ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&