qcacmn: Use UNBOUND flag to create WMI RX workqueue

WMI RX workqueue is created with WQ_MEM_RECLAIM flag. When host receives
the WMI service ready event it queues the work. There is 50sec delay in
scheduling workqueue to process WMI service ready event. This results in
host timeout (timeout = 15sec) and wifi load failure. This cleans up the
host data structures related to data path. But work got scheduled after
50sec resulting in init path handling with inconsistent data structures.

Use workqueue UNBOUND flag to create WMI RX workqueue. Works queued to
unbound workqueues are implicitly HIGHPRI and dispatched to unbound
workers as soon as resources are available.

Change-Id: I46eb0242ad88103268df99be9fd2e0759ebec4b2
CRs-Fixed: 2343181

qdf/inc/qdf_defer.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -142,6 +142,17 @@ static inline qdf_workqueue_t *qdf_create_singlethread_workqueue(char *name)
 	return  __qdf_create_singlethread_workqueue(name);
 }
 
+/**
+ * qdf_alloc_unbound_workqueue - allocate an unbound workqueue
+ * @name: string
+ *
+ * Return: pointer of type qdf_workqueue_t
+ */
+static inline qdf_workqueue_t *qdf_alloc_unbound_workqueue(char *name)
+{
+	return  __qdf_alloc_unbound_workqueue(name);
+}
+
 /**
  * qdf_queue_work - Queue the work/task
  * @hdl: OS handle

qdf/linux/src/i_qdf_defer.h

@@ -216,6 +216,17 @@ static inline __qdf_workqueue_t *__qdf_create_singlethread_workqueue(char *name)
 	return create_singlethread_workqueue(name);
 }
 
+/**
+ * __qdf_alloc_unbound_workqueue - alloc an unbound workqueue
+ * @name: string
+ *
+ * Return: pointer of type qdf_workqueue_t
+ */
+static inline __qdf_workqueue_t *__qdf_alloc_unbound_workqueue(char *name)
+{
+	return alloc_workqueue(name, WQ_UNBOUND, 0);
+}
+
 /**
  * __qdf_flush_workqueue - flush the workqueue
  * @wqueue: pointer to workqueue

wmi/src/wmi_unified.c

@@ -2440,7 +2440,7 @@ void *wmi_unified_get_pdev_handle(struct wmi_soc *soc, uint32_t pdev_idx)
 		qdf_create_work(0, &wmi_handle->rx_event_work,
 				wmi_rx_event_work, wmi_handle);
 		wmi_handle->wmi_rx_work_queue =
-			qdf_create_workqueue("wmi_rx_event_work_queue");
+			qdf_alloc_unbound_workqueue("wmi_rx_event_work_queue");
 		if (NULL == wmi_handle->wmi_rx_work_queue) {
 			WMI_LOGE("failed to create wmi_rx_event_work_queue");
 			goto error;
@@ -2570,7 +2570,7 @@ void *wmi_unified_attach(void *scn_handle,
 	qdf_create_work(0, &wmi_handle->rx_event_work,
 			wmi_rx_event_work, wmi_handle);
 	wmi_handle->wmi_rx_work_queue =
-		qdf_create_workqueue("wmi_rx_event_work_queue");
+		qdf_alloc_unbound_workqueue("wmi_rx_event_work_queue");
 	if (NULL == wmi_handle->wmi_rx_work_queue) {
 		WMI_LOGE("failed to create wmi_rx_event_work_queue");
 		goto error;