qcacld-3.0: Check if gp_sap_ctx is empty after reinit

In SSR, after reinit, there is still memory leak
for gp_sap_ctx; As in multi SSR test, memory leak
detection is disabled in recovery mode, it is a
little late to get the issue moment.

Check gp_sap_ctx after stopping all adapter in
hdd_is_interface_down_during_ssr.

Change-Id: I77708d296fb218ca53ac656f844d02f58e23d241
CRs-Fixed: 2377718

core/sap/inc/sap_api.h

@@ -799,6 +799,14 @@ bool wlansap_is_channel_in_nol_list(struct sap_context *sap_ctx,
 				    uint8_t channelNumber,
 				    ePhyChanBondState chanBondState);
 
+/**
+ * wlansap_is_gp_sap_ctx_empty() - This API checks if gp_sap_ctx
+ * is empty
+ *
+ * Return: TRUE if empty, FALSE otherwise
+ */
+bool wlansap_is_gp_sap_ctx_empty(void);
+
 /**
  * wlansap_is_channel_leaking_in_nol() - This API checks if channel is leaking
  * in nol list

core/sap/src/sap_module.c

@@ -369,6 +369,23 @@ bool wlansap_is_channel_in_nol_list(struct sap_context *sap_ctx,
 					      chanBondState);
 }
 
+bool wlansap_is_gp_sap_ctx_empty(void)
+{
+	int8_t i;
+	bool is_empty = TRUE;
+
+	qdf_mutex_acquire(&sap_context_lock);
+	for (i = 0; i < SAP_MAX_NUM_SESSION; i++) {
+		if (NULL != gp_sap_ctx[i]) {
+			is_empty = FALSE;
+			break;
+		}
+	}
+	qdf_mutex_release(&sap_context_lock);
+
+	return is_empty;
+}
+
 static QDF_STATUS wlansap_mark_leaking_channel(struct wlan_objmgr_pdev *pdev,
 		uint8_t *leakage_adjusted_lst,
 		uint8_t chan_bw)