wcn36xx: del BA session on TX stop

Deleting BA session was not correcly performed, causing communication
issues with APs that dynamically stop/start new BA sessions.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1611328304-1010-1-git-send-email-loic.poulain@linaro.org

drivers/net/wireless/ath/wcn36xx/main.c

@@ -1140,7 +1140,7 @@ static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
 				       session);
 		break;
 	case IEEE80211_AMPDU_RX_STOP:
-		wcn36xx_smd_del_ba(wcn, tid, get_sta_index(vif, sta_priv));
+		wcn36xx_smd_del_ba(wcn, tid, 0, get_sta_index(vif, sta_priv));
 		break;
 	case IEEE80211_AMPDU_TX_START:
 		spin_lock_bh(&sta_priv->ampdu_lock);
@@ -1164,6 +1164,7 @@ static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
 		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_NONE;
 		spin_unlock_bh(&sta_priv->ampdu_lock);
 
+		wcn36xx_smd_del_ba(wcn, tid, 1, get_sta_index(vif, sta_priv));
 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 		break;
 	default:

drivers/net/wireless/ath/wcn36xx/smd.c

@@ -2466,7 +2466,7 @@ int wcn36xx_smd_add_ba(struct wcn36xx *wcn, u8 session_id)
 	return ret;
 }
 
-int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index)
+int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 direction, u8 sta_index)
 {
 	struct wcn36xx_hal_del_ba_req_msg msg_body;
 	int ret;
@@ -2476,7 +2476,7 @@ int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index)
 
 	msg_body.sta_index = sta_index;
 	msg_body.tid = tid;
-	msg_body.direction = 0;
+	msg_body.direction = direction;
 	PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
 
 	ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);

drivers/net/wireless/ath/wcn36xx/smd.h

@@ -135,7 +135,7 @@ int wcn36xx_smd_add_ba_session(struct wcn36xx *wcn,
 		u8 direction,
 		u8 sta_index);
 int wcn36xx_smd_add_ba(struct wcn36xx *wcn, u8 session_id);
-int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index);
+int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 direction, u8 sta_index);
 int wcn36xx_smd_trigger_ba(struct wcn36xx *wcn, u8 sta_index, u16 tid, u8 session_id);
 
 int wcn36xx_smd_update_cfg(struct wcn36xx *wcn, u32 cfg_id, u32 value);