qcacld-3.0: Wait for driver probe to complete in module_init

During wifi-on the framework will load the driver and starts the
supplicant. In the present scenario, as soon as the driver registers
with the platform driver it checks whether FW_READY indication is
recieved. If the FW_READY is received the platform driver calls
probe of the driver in same context of the wifistate machine. If
the FW_READY indication is not received it calls the probe of the
driver in the work queue context. This is resulting in the wifi grey
out in the UI.

So, wait for the driver probe completion in the module_init, before
returning the context to framework.

Change-Id: I21b70f7e383bde07ac8cc3d4969be18b840d26a4
CRs-fixed: 1112295

core/hdd/src/wlan_hdd_main.c

@@ -199,7 +199,7 @@ static const struct wiphy_wowlan_support wowlan_support_reg_init = {
 /* internal function declaration */
 
 struct sock *cesium_nl_srv_sock;
-
+struct completion wlan_start_comp;
 #ifdef FEATURE_WLAN_AUTO_SHUTDOWN
 void wlan_hdd_auto_shutdown_cb(void);
 #endif
@@ -8529,6 +8529,7 @@ int hdd_wlan_startup(struct device *dev)
 		if (!QDF_IS_STATUS_SUCCESS(status))
 			hdd_err("Failed to disable Chan Avoidance Indication");
 	}
+	complete(&wlan_start_comp);
 	goto success;
 
 err_close_adapters:
@@ -9476,11 +9477,7 @@ void hdd_deinit(void)
 #endif
 }
 
-#ifdef QCA_WIFI_3_0_ADRASTEA
-#define HDD_WLAN_START_WAIT_TIME (3600 * 1000)
-#else
 #define HDD_WLAN_START_WAIT_TIME (CDS_WMA_TIMEOUT + 5000)
-#endif
 
 /**
  * __hdd_module_init - Module init helper
@@ -9492,6 +9489,7 @@ void hdd_deinit(void)
 static int __hdd_module_init(void)
 {
 	int ret = 0;
+	unsigned long rc;
 
 	pr_err("%s: Loading driver v%s\n", WLAN_MODULE_NAME,
 		QWLAN_VERSIONSTR TIMER_MANAGER_STR MEMORY_DEBUG_STR);
@@ -9510,6 +9508,7 @@ static int __hdd_module_init(void)
 
 	hdd_set_conparam((uint32_t) con_mode);
 
+	init_completion(&wlan_start_comp);
 	ret = wlan_hdd_register_driver();
 	if (ret) {
 		pr_err("%s: driver load failure, err %d\n", WLAN_MODULE_NAME,
@@ -9517,6 +9516,15 @@ static int __hdd_module_init(void)
 		goto out;
 	}
 
+	rc = wait_for_completion_timeout(&wlan_start_comp,
+				msecs_to_jiffies(HDD_WLAN_START_WAIT_TIME));
+
+	if (!rc) {
+		hdd_alert("Timed-out waiting for wlan_hdd_register_driver");
+		QDF_BUG(0);
+		goto out;
+	}
+
 	pr_info("%s: driver loaded\n", WLAN_MODULE_NAME);
 
 	return 0;