From 8bad8dcd0c1a9a9160ad7787f79ebf617881c01e Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Wed, 11 Mar 2015 14:25:26 +0100 Subject: [PATCH] ath10k: strip qos data bit always NativeWifi tx mode expects QoS Data frames to be delivered as Data frames with QoS part (e.g. tid) being delievered out-of-band in fw tx command. The QoS bit wasn't stripped before submitting to firmware. Stripping fixes two known problems: * qca6174 IOT with some APs, e.g. Cisco AIR-AP 1252 (which would crash after ath10k association). Some ath9k APs would crash as well. * sniffing own tx frames via radiotap because, e.g. wireshark was seeing QoS bit set but since QoS Control was stripped in ath10k it would parse beginning of LLC/SNAP >From debugability point of view this removes the ability to distinguish QoS from non-QoS frames when sniffing own tx via radiotap. On the other hand frames can be now parsed correctly without special software modification. Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 341f3c8..f386d0b 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -2535,16 +2535,15 @@ static void ath10k_tx_h_nwifi(struct ieee80211_hw *hw, struct sk_buff *skb) skb->data, (void *)qos_ctl - (void *)skb->data); skb_pull(skb, IEEE80211_QOS_CTL_LEN); - /* Fw/Hw generates a corrupted QoS Control Field for QoS NullFunc - * frames. Powersave is handled by the fw/hw so QoS NyllFunc frames are - * used only for CQM purposes (e.g. hostapd station keepalive ping) so - * it is safe to downgrade to NullFunc. + /* Some firmware revisions don't handle sending QoS NullFunc well. + * These frames are mainly used for CQM purposes so it doesn't really + * matter whether QoS NullFunc or NullFunc are sent. */ hdr = (void *)skb->data; - if (ieee80211_is_qos_nullfunc(hdr->frame_control)) { - hdr->frame_control &= ~__cpu_to_le16(IEEE80211_STYPE_QOS_DATA); + if (ieee80211_is_qos_nullfunc(hdr->frame_control)) cb->htt.tid = HTT_DATA_TX_EXT_TID_NON_QOS_MCAST_BCAST; - } + + hdr->frame_control &= ~__cpu_to_le16(IEEE80211_STYPE_QOS_DATA); } static void ath10k_tx_h_add_p2p_noa_ie(struct ath10k *ar, -- 2.7.4