qcacld-3.0: Prevent RTPM during vdev destroy

Prevent RTPM during vdev destroy as part of the
stop adapter. RTPM during vdev destroy leads to
unnecessary wait times for suspend/resume operations.

This delay becomes huge when the overall CPU performance
is bad and leads to PEER DELETE TIMEOUT/VDEV DELETE TIMEOUT.

Change-Id: I5de1b5459fb03a0799d869077c7d30a9043bf3f7
CRs-Fixed: 3463758

core/hdd/inc/wlan_hdd_main.h

@@ -909,6 +909,7 @@ struct hdd_chan_change_params {
  * @wow_unit_test: wow unit test mode context to prevent/allow runtime pm
  * @system_suspend: system suspend context to prevent/allow runtime pm
  * @dyn_mac_addr_update: update mac addr context to prevent/allow runtime pm
+ * @vdev_destroy: vdev destroy context to prevent/allow runtime pm
  *
  * Runtime PM control for underlying activities
  */
@@ -921,6 +922,7 @@ struct hdd_runtime_pm_context {
 	qdf_runtime_lock_t wow_unit_test;
 	qdf_runtime_lock_t system_suspend;
 	qdf_runtime_lock_t dyn_mac_addr_update;
+	qdf_runtime_lock_t vdev_destroy;
 };
 
 /*

core/hdd/src/wlan_hdd_main.c

@@ -1333,6 +1333,7 @@ static void hdd_runtime_suspend_context_init(struct hdd_context *hdd_ctx)
 	qdf_runtime_lock_init(&ctx->wow_unit_test);
 	qdf_runtime_lock_init(&ctx->system_suspend);
 	qdf_runtime_lock_init(&ctx->dyn_mac_addr_update);
+	qdf_runtime_lock_init(&ctx->vdev_destroy);
 
 	qdf_rtpm_register(QDF_RTPM_ID_WIPHY_SUSPEND, NULL);
 	qdf_rtpm_register(QDF_RTPM_ID_PM_QOS_NOTIFY, NULL);
@@ -1362,6 +1363,7 @@ static void hdd_runtime_suspend_context_deinit(struct hdd_context *hdd_ctx)
 	qdf_runtime_lock_deinit(&ctx->connect);
 	qdf_runtime_lock_deinit(&ctx->dfs);
 	qdf_runtime_lock_deinit(&ctx->system_suspend);
+	qdf_runtime_lock_deinit(&ctx->vdev_destroy);
 
 	qdf_rtpm_deregister(QDF_RTPM_ID_WIPHY_SUSPEND);
 	qdf_rtpm_deregister(QDF_RTPM_ID_PM_QOS_NOTIFY);
@@ -6469,7 +6471,12 @@ int hdd_vdev_destroy(struct hdd_adapter *adapter)
 	/* Release the hdd reference */
 	wlan_objmgr_vdev_release_ref(vdev, WLAN_HDD_ID_OBJ_MGR);
 
+	/* Get runtime lock to prevent runtime suspend */
+	qdf_runtime_pm_prevent_suspend(&hdd_ctx->runtime_context.vdev_destroy);
+
 	ret = hdd_vdev_destroy_event_wait(hdd_ctx, vdev);
+
+	qdf_runtime_pm_allow_suspend(&hdd_ctx->runtime_context.vdev_destroy);
 	return ret;
 }