diff options
| author | Michal Kazior <michal.kazior@tieto.com> | 2014-07-21 22:03:10 +0400 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2014-07-22 19:54:04 +0400 |
| commit | c21c64d145e64d92a6c8f8e13c9b6b5b711832eb (patch) | |
| tree | 163134e73641ad5ae1caaa72de832a359c80d4b8 /drivers/net/wireless/ath | |
| parent | 4b6045586f31c7cc49b641a7ad5298b0c379a1c7 (diff) | |
| download | linux-c21c64d145e64d92a6c8f8e13c9b6b5b711832eb.tar.xz | |
ath10k: workaround qos nullfunc bug
Apparently fw/hw generates a corrupted QoS Control
Field in Qos NullFunc frames. The only way to
workaround this is to downgrade frames to
NullFunc. This should be okay since powersave is
done by fw/hw and these frames are only used for
CQM purposes (e.g. from hostapd to check if
station is still connected).
This doesn't fix any user visible bug that I know
of. It just prevents from sending out funky frames
on the air.
Reported-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/mac.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index bbce3a0f8a39..3f9afaa93cca 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -1871,6 +1871,7 @@ static u8 ath10k_tx_h_get_vdev_id(struct ath10k *ar, static void ath10k_tx_h_nwifi(struct ieee80211_hw *hw, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (void *)skb->data; + struct ath10k_skb_cb *cb = ATH10K_SKB_CB(skb); u8 *qos_ctl; if (!ieee80211_is_data_qos(hdr->frame_control)) @@ -1880,6 +1881,16 @@ static void ath10k_tx_h_nwifi(struct ieee80211_hw *hw, struct sk_buff *skb) memmove(skb->data + IEEE80211_QOS_CTL_LEN, 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. + */ + if (ieee80211_is_qos_nullfunc(hdr->frame_control)) { + hdr->frame_control &= ~__cpu_to_le16(IEEE80211_STYPE_QOS_DATA); + cb->htt.tid = HTT_DATA_TX_EXT_TID_NON_QOS_MCAST_BCAST; + } } static void ath10k_tx_wep_key_work(struct work_struct *work) |