ath9k: declare required extra tx headroom

ath9k inserts padding between the 802.11 header and the data area (to
align it). Since it didn't declare this extra required headroom, this
led to some nasty issues like randomly dropped packets in some setups.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 57f95f2dca5b072ac294b2c76122ec1b952a2a80..90eb75012e4f4818a03481d98cb9b137a89393fa 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -880,6 +880,7 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
        hw->max_rate_tries = 10;
        hw->sta_data_size = sizeof(struct ath_node);
        hw->vif_data_size = sizeof(struct ath_vif);
+       hw->extra_tx_headroom = 4;
 
        hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1;
        hw->wiphy->available_antennas_tx = BIT(ah->caps.max_txchains) - 1;