qcacmn: Address synchronization issue in 11d state machine

Currently whenever host gets an indication for the cc event
list, it starts 11d machine and inside 11d state machine,
it decides that whether host needs to send start 11d scan
command to fw or stop 11d scan command to fw, based on that it
updates the enable_11d_supp variable of regulatory psoc private
object and posts the message to scheduler.
FW expects that host should not send back to back 11d start
scan command, there should be one 11d stop scan command before
next 11d start scan command is sent if already one 11d start
scan command is sent.
Host 11d state machine takes care of the above sequence
of 11d scan command by using enable_11d_supp. 11d state machine
sets enable_11d_supp whenever 11d scan start command needs to
be sent and resets enable_11d_supp whenever 11d scan stop
command needs to be sent and posts the message in the scheduler.
There is a case where if host receives the 11d cc event from FW
it sends the set country command to FW and at the same time if
user command comes to set the country, host again sends the set
country command to FW. FW processes both of these commands and
sends the cc list event to host. when host receives cc events
it starts the 11d machine. For the first cc event which is for
11d country which is processed as user country because of
incorrect logic in reg process master channel list where it is
assumed that at a time only one type of country set command can
be pending and first priority is given to the user country pending,
host resets enable_11d_supp and post the command to scheduler.
When host receives the cc list event for the user country it is
processed as 11d country and inside 11d state machine it sets
enable_11d_supp and posts the command to scheduler.
Now if scheduler schedules these commands it treats both the
commands as start 11d scan commands as enable_11d_supp is set
and sends start 11d scan command back to back.
To avoid above issue, add enable_11d_supp also as part of
the scheduler msg body pointer along with the psoc, in she
scheduler callback use this local variable to decide whether
11d start scan needs to be sent or 11d stop scan needs to be
sent.

Change-Id: I60150da1475251a1c22778a0f924bdfbe1bb1140
CRs-Fixed: 2641803

umac/regulatory/core/src/reg_offload_11d_scan.c

@@ -101,9 +101,11 @@ QDF_STATUS reg_set_11d_country(struct wlan_objmgr_pdev *pdev,
  */
 static QDF_STATUS reg_send_11d_flush_cbk(struct scheduler_msg *msg)
 {
-	struct wlan_objmgr_psoc *psoc = msg->bodyptr;
+	struct reg_11d_scan_msg *scan_msg_11d = msg->bodyptr;
+	struct wlan_objmgr_psoc *psoc = scan_msg_11d->psoc;
 
 	wlan_objmgr_psoc_release_ref(psoc, WLAN_REGULATORY_SB_ID);
+	qdf_mem_free(scan_msg_11d);
 
 	return QDF_STATUS_SUCCESS;
 }
@@ -116,7 +118,8 @@ static QDF_STATUS reg_send_11d_flush_cbk(struct scheduler_msg *msg)
  */
 static QDF_STATUS reg_send_11d_msg_cbk(struct scheduler_msg *msg)
 {
-	struct wlan_objmgr_psoc *psoc = msg->bodyptr;
+	struct reg_11d_scan_msg *scan_msg_11d = msg->bodyptr;
+	struct wlan_objmgr_psoc *psoc = scan_msg_11d->psoc;
 	struct wlan_lmac_if_reg_tx_ops *tx_ops;
 	struct reg_start_11d_scan_req start_req;
 	struct reg_stop_11d_scan_req stop_req;
@@ -136,7 +139,7 @@ static QDF_STATUS reg_send_11d_msg_cbk(struct scheduler_msg *msg)
 		goto end;
 	}
 
-	if (psoc_priv_obj->enable_11d_supp) {
+	if (scan_msg_11d->enable_11d_supp) {
 		start_req.vdev_id = psoc_priv_obj->vdev_id_for_11d_scan;
 		start_req.scan_period_msec = psoc_priv_obj->scan_11d_interval;
 		start_req.start_interval_msec = 0;
@@ -149,26 +152,28 @@ static QDF_STATUS reg_send_11d_msg_cbk(struct scheduler_msg *msg)
 	}
 
 end:
+	qdf_mem_free(scan_msg_11d);
 	wlan_objmgr_psoc_release_ref(psoc, WLAN_REGULATORY_SB_ID);
 	return QDF_STATUS_SUCCESS;
 }
 
 /**
  * reg_sched_11d_msg() - Schedules 11d scan message.
- * @psoc: soc context
+ * @scan_msg_11d: 11d scan message
  */
-static QDF_STATUS reg_sched_11d_msg(struct wlan_objmgr_psoc *psoc)
+static QDF_STATUS reg_sched_11d_msg(struct reg_11d_scan_msg *scan_msg_11d)
 {
 	struct scheduler_msg msg = {0};
 	QDF_STATUS status;
 
-	status = wlan_objmgr_psoc_try_get_ref(psoc, WLAN_REGULATORY_SB_ID);
+	status = wlan_objmgr_psoc_try_get_ref(scan_msg_11d->psoc,
+					      WLAN_REGULATORY_SB_ID);
 	if (QDF_IS_STATUS_ERROR(status)) {
 		reg_err("error taking psoc ref cnt");
 		return status;
 	}
 
-	msg.bodyptr = psoc;
+	msg.bodyptr = scan_msg_11d;
 	msg.callback = reg_send_11d_msg_cbk;
 	msg.flush_callback = reg_send_11d_flush_cbk;
 
@@ -176,7 +181,8 @@ static QDF_STATUS reg_sched_11d_msg(struct wlan_objmgr_psoc *psoc)
 					QDF_MODULE_ID_REGULATORY,
 					QDF_MODULE_ID_TARGET_IF, &msg);
 	if (QDF_IS_STATUS_ERROR(status))
-		wlan_objmgr_psoc_release_ref(psoc, WLAN_REGULATORY_SB_ID);
+		wlan_objmgr_psoc_release_ref(scan_msg_11d->psoc,
+					     WLAN_REGULATORY_SB_ID);
 
 	return status;
 }
@@ -186,6 +192,7 @@ void reg_run_11d_state_machine(struct wlan_objmgr_psoc *psoc)
 	bool temp_11d_support;
 	struct wlan_regulatory_psoc_priv_obj *psoc_priv_obj;
 	bool world_mode;
+	struct reg_11d_scan_msg *scan_msg_11d;
 
 	psoc_priv_obj = reg_get_psoc_obj(psoc);
 	if (!psoc_priv_obj) {
@@ -222,10 +229,17 @@ void reg_run_11d_state_machine(struct wlan_objmgr_psoc *psoc)
 		  psoc_priv_obj->vdev_id_for_11d_scan);
 
 	if (temp_11d_support != psoc_priv_obj->enable_11d_supp) {
-		if (psoc_priv_obj->is_11d_offloaded)
-			reg_sched_11d_msg(psoc);
-		else
+		if (psoc_priv_obj->is_11d_offloaded) {
+			scan_msg_11d = qdf_mem_malloc(sizeof(*scan_msg_11d));
+			if (!scan_msg_11d)
+				return;
+			scan_msg_11d->psoc = psoc;
+			scan_msg_11d->enable_11d_supp =
+						psoc_priv_obj->enable_11d_supp;
+			reg_sched_11d_msg(scan_msg_11d);
+		} else {
 			reg_11d_host_scan(psoc_priv_obj);
+		}
 	}
 }
 

umac/regulatory/dispatcher/inc/reg_services_public_struct.h

@@ -648,6 +648,15 @@ struct reg_start_11d_scan_req {
 	uint32_t start_interval_msec;
 };
 
+/**
+ * struct reg_11d_scan_msg: 11d scan message structure
+ * @psoc: pointer to psoc object
+ * @enable_11d_supp: enable 11d scan or disable 11d scan
+ */
+struct reg_11d_scan_msg {
+	struct wlan_objmgr_psoc *psoc;
+	bool enable_11d_supp;
+};
 /**
  * struct reg_stop_11d_scan_req: stop 11d scan request
  * @vdev_id: vdev id