qcacld-3.0: Wait for hw mode change done for vdev delete

Vdev delete will purge the serialization queue for the vdev.
If the hw mode change request is flushed without waiting for
the fw completion event, it will cause issues when the fw event
coming up later and no active serialization command in queue.
In one case, the “hw_mode_change_in_progress” is not cleared
in this condition. And finally causes the new Connection req
failed to wait for hw mode change event because there is no
hw change request actually.

Fix by check and wait for hw mode response if any hw mode change
is in progress.

Change-Id: I007643f48ff1d35fbdb2c9ca9a3127bbd66d7dec
CRs-Fixed: 2760395

core/hdd/src/wlan_hdd_main.c

@@ -5240,6 +5240,32 @@ int hdd_vdev_ready(struct hdd_adapter *adapter)
 	return qdf_status_to_os_return(status);
 }
 
+/**
+ * hdd_check_wait_for_hw_mode_completion - Check hw mode in progress
+ * @hdd_ctx: hdd context
+ *
+ * Check and wait for hw mode response if any hw mode change is
+ * in progress. Vdev delete will purge the serialization queue
+ * for the vdev. It will cause issues when the fw event coming
+ * up later and no active hw mode change req ser command in queue.
+ *
+ * Return void
+ */
+static void hdd_check_wait_for_hw_mode_completion(struct hdd_context *hdd_ctx)
+{
+	QDF_STATUS status;
+
+	if (!wlan_hdd_validate_context(hdd_ctx) &&
+	    policy_mgr_is_hw_mode_change_in_progress(
+		hdd_ctx->psoc)) {
+		status = policy_mgr_wait_for_connection_update(
+			hdd_ctx->psoc);
+		if (!QDF_IS_STATUS_SUCCESS(status)) {
+			hdd_nofl_debug("qdf wait for hw mode event failed!!");
+		}
+	}
+}
+
 int hdd_vdev_destroy(struct hdd_adapter *adapter)
 {
 	QDF_STATUS status;
@@ -5270,6 +5296,8 @@ int hdd_vdev_destroy(struct hdd_adapter *adapter)
 	    !policy_mgr_get_connection_count(hdd_ctx->psoc))
 		policy_mgr_check_and_stop_opportunistic_timer(hdd_ctx->psoc,
 							      adapter->vdev_id);
+	/* Check and wait for hw mode response */
+	hdd_check_wait_for_hw_mode_completion(hdd_ctx);
 
 	vdev = hdd_objmgr_get_vdev(adapter);
 	if (!vdev)