[PATCH 2/4] In AP mode notify upper layers whet sta was lost

[Eugene Krasnikov]

HW will notify driver through delete_sta_context_ind that sta was lost.
Report low ack to wpa_supplicant so it can take an action on that.
wpa_supplicant will disconnect sta if in conf file flag is set like
this disassoc_low_ack=1.

Signed-off-by: Eugene Krasnikov <k.eugene.e at gmail.com>
---
 hal.h |  4 ++--
 smd.c | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/hal.h b/hal.h
index e45f8b1..2b9f1b9 100644
--- a/hal.h
+++ b/hal.h
@@ -2854,7 +2854,7 @@ struct send_unknown_frame_rx_ind_msg {
 	u32 status;
 };
 
-struct delete_sta_context_ind_msg {
+struct wcn36xx_hal_delete_sta_context_ind_msg {
 	struct wcn36xx_hal_msg_header header;
 
 	u16 aid;
@@ -2868,7 +2868,7 @@ struct delete_sta_context_ind_msg {
 
 	/* To unify the keepalive / unknown A2 / tim-based disa */
 	u16 reason_code;
-};
+} __packed;
 
 struct indicate_del_sta {
 	struct wcn36xx_hal_msg_header header;
diff --git a/smd.c b/smd.c
index 4924e6c..13a795f 100644
--- a/smd.c
+++ b/smd.c
@@ -1382,6 +1382,30 @@ static int wcn36xx_smd_missed_beacon_ind(struct wcn36xx *wcn,
 	return 0;
 }
 
+static int wcn36xx_smd_delete_sta_context_ind(struct wcn36xx *wcn,
+					 void *buf,
+					 size_t len)
+{
+	struct wcn36xx_hal_delete_sta_context_ind_msg *rsp = buf;
+	struct ieee80211_vif *vif = container_of((void *)wcn->current_vif,
+						 struct ieee80211_vif,
+						 drv_priv);
+	struct ieee80211_sta *sta;
+	if (len != sizeof(*rsp)) {
+		wcn36xx_warn("Bad delete sta indication");
+		return -EIO;
+	}
+
+	rcu_read_lock();
+	sta = ieee80211_find_sta(vif, rsp->addr2);
+	if (sta) {
+		wcn36xx_dbg(WCN36XX_DBG_HAL,
+		    "delete station indication %pM", rsp->addr2);
+		ieee80211_report_low_ack(sta, 0);
+	}
+	rcu_read_unlock();
+	return 0;
+}
 static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
 {
 	struct wcn36xx_hal_msg_header *msg_header = buf;
@@ -1447,6 +1471,9 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
 	case WCN36XX_HAL_FEATURE_CAPS_EXCHANGE_RSP:
 		wcn36xx_smd_feature_caps_exchange_rsp(buf, len);
 		break;
+	case WCN36XX_HAL_DELETE_STA_CONTEXT_IND:
+		wcn36xx_smd_delete_sta_context_ind(wcn, buf, len);
+		break;
 	default:
 		wcn36xx_error("SMD_EVENT (%d) not supported", msg_header->msg_type);
 	}
-- 
1.8.2.2