qcacld-3.0: Remove hdd_init_deinit_lock

hdd_init_deinit_lock has been obsoleted by the addition and integration
of the Driver Synchronization feature. Remove hdd_init_deinit_lock.

Change-Id: Ia1b9e4279f42023ba2c956224ceabd02d8b4c6d4
CRs-Fixed: 2420766

core/hdd/inc/wlan_hdd_main.h

@@ -369,8 +369,6 @@ enum hdd_driver_flags {
 /* Assigned size of driver memory dump is 4096 bytes */
 #define DRIVER_MEM_DUMP_SIZE    4096
 
-extern struct mutex hdd_init_deinit_lock;
-
 /* MAX OS Q block time value in msec
  * Prevent from permanent stall, resume OS Q if timer expired
  */

core/hdd/src/wlan_hdd_driver_ops.c

@@ -359,7 +359,6 @@ static int check_for_probe_defer(int ret)
 
 static void hdd_soc_load_lock(struct device *dev)
 {
-	mutex_lock(&hdd_init_deinit_lock);
 	hdd_prevent_suspend(WIFI_POWER_EVENT_WAKELOCK_DRIVER_INIT);
 	hdd_request_pm_qos(dev, DISABLE_KRAIT_IDLE_PS_VAL);
 }
@@ -368,7 +367,6 @@ static void hdd_soc_load_unlock(struct device *dev)
 {
 	hdd_remove_pm_qos(dev);
 	hdd_allow_suspend(WIFI_POWER_EVENT_WAKELOCK_DRIVER_INIT);
-	mutex_unlock(&hdd_init_deinit_lock);
 }
 
 static int __hdd_soc_probe(struct device *dev,
@@ -579,7 +577,6 @@ static void __hdd_soc_remove(struct device *dev)
 	if (!hdd_wait_for_debugfs_threads_completion())
 		hdd_warn("Debugfs threads are still active attempting driver unload anyway");
 
-	mutex_lock(&hdd_init_deinit_lock);
 	if (hdd_get_conparam() == QDF_GLOBAL_EPPING_MODE) {
 		hdd_wlan_stop_modules(hdd_ctx, false);
 		epping_disable();
@@ -590,8 +587,6 @@ static void __hdd_soc_remove(struct device *dev)
 
 	hdd_context_destroy(hdd_ctx);
 
-	mutex_unlock(&hdd_init_deinit_lock);
-
 	cds_set_driver_in_bad_state(false);
 	cds_set_unload_in_progress(false);
 
@@ -713,23 +708,21 @@ static void __hdd_soc_recovery_shutdown(void)
 	/* cancel/flush any pending/active idle shutdown work */
 	hdd_psoc_idle_timer_stop(hdd_ctx);
 
-	mutex_lock(&hdd_init_deinit_lock);
-
 	/* nothing to do if the soc is already unloaded */
 	if (hdd_ctx->driver_status == DRIVER_MODULES_CLOSED) {
 		hdd_info("Driver modules are already closed");
-		goto unlock;
+		return;
 	}
 
 	if (cds_is_load_or_unload_in_progress()) {
 		hdd_info("Load/unload in progress, ignore SSR shutdown");
-		goto unlock;
+		return;
 	}
 
 	hif_ctx = cds_get_context(QDF_MODULE_ID_HIF);
 	if (!hif_ctx) {
 		hdd_err("Failed to get HIF context, ignore SSR shutdown");
-		goto unlock;
+		return;
 	}
 
 	/* mask the host controller interrupts */
@@ -747,13 +740,6 @@ static void __hdd_soc_recovery_shutdown(void)
 		hif_disable_isr(hif_ctx);
 		hdd_wlan_shutdown();
 	}
-
-	mutex_unlock(&hdd_init_deinit_lock);
-
-	return;
-
-unlock:
-	mutex_unlock(&hdd_init_deinit_lock);
 }
 
 /**

core/hdd/src/wlan_hdd_main.c

@@ -232,8 +232,6 @@ static char *country_code;
 static int enable_11d = -1;
 static int enable_dfs_chan_scan = -1;
 
-DEFINE_MUTEX(hdd_init_deinit_lock);
-
 #define WLAN_NLINK_CESIUM 30
 
 static qdf_wake_lock_t wlan_wake_lock;
@@ -3113,8 +3111,6 @@ static int __hdd_open(struct net_device *dev)
 		return -EBUSY;
 	}
 
-	mutex_lock(&hdd_init_deinit_lock);
-
 	/*
 	 * This scenario can be hit in cases where in the wlan driver after
 	 * registering the netdevices and there is a failure in driver
@@ -3124,14 +3120,13 @@ static int __hdd_open(struct net_device *dev)
 
 	if (!cds_is_driver_loaded()) {
 		hdd_err("Failed to start the wlan driver!!");
-		ret = -EIO;
-		goto err_hdd_hdd_init_deinit_lock;
+		return -EIO;
 	}
 
 	ret = hdd_psoc_idle_restart(hdd_ctx);
 	if (ret) {
 		hdd_err("Failed to start WLAN modules return");
-		goto err_hdd_hdd_init_deinit_lock;
+		return ret;
 	}
 
 	if (!test_bit(SME_SESSION_OPENED, &adapter->event_flags)) {
@@ -3139,7 +3134,7 @@ static int __hdd_open(struct net_device *dev)
 		if (ret) {
 			hdd_err("Failed to start adapter :%d",
 				adapter->device_mode);
-			goto err_hdd_hdd_init_deinit_lock;
+			return ret;
 		}
 	}
 
@@ -3163,10 +3158,7 @@ static int __hdd_open(struct net_device *dev)
 	hdd_populate_wifi_pos_cfg(hdd_ctx);
 	hdd_lpass_notify_start(hdd_ctx, adapter);
 
-err_hdd_hdd_init_deinit_lock:
-	mutex_unlock(&hdd_init_deinit_lock);
-
-	return ret;
+	return 0;
 }
 
 /**
@@ -13507,7 +13499,6 @@ static int __hdd_driver_mode_change(struct hdd_context *hdd_ctx,
 	}
 
 	qdf_atomic_set(&hdd_ctx->con_mode_flag, 1);
-	mutex_lock(&hdd_init_deinit_lock);
 
 	curr_mode = hdd_get_conparam();
 	if (curr_mode == next_mode) {
@@ -13570,7 +13561,6 @@ static int __hdd_driver_mode_change(struct hdd_context *hdd_ctx,
 	errno = 0;
 
 unlock:
-	mutex_unlock(&hdd_init_deinit_lock);
 	qdf_atomic_set(&hdd_ctx->con_mode_flag, 0);
 
 	return errno;