package/kernel/mac80211/patches/397-ath9k-declare-required-extra-tx-headroom.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Thu, 24 Sep 2015 16:57:37 +0200
   3 Subject: [PATCH] ath9k: declare required extra tx headroom
   4
   5 ath9k inserts padding between the 802.11 header and the data area (to
   6 align it). Since it didn't declare this extra required headroom, this
   7 led to some nasty issues like randomly dropped packets in some setups.
   8
   9 Cc: stable@vger.kernel.org
  10 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  11 ---
  12
  13 --- a/drivers/net/wireless/ath/ath9k/init.c
  14 +++ b/drivers/net/wireless/ath/ath9k/init.c
  15 @@ -867,6 +867,7 @@ static void ath9k_set_hw_capab(struct at
  16         hw->max_rate_tries = 10;
  17         hw->sta_data_size = sizeof(struct ath_node);
  18         hw->vif_data_size = sizeof(struct ath_vif);
  19 +       hw->extra_tx_headroom = 4;
  20
  21         hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1;
  22         hw->wiphy->available_antennas_tx = BIT(ah->caps.max_txchains) - 1;