qcacmn: Fix wmi debugfs creation after interface creation timeout

After driver init, if not interface is created and the stop modules
gets called, the wmi debugfs dir is removed. After this it is not
created again during start modules. Due to this the wmi debugfs will
be unavailable after this.

Fix the wmi debugfs entry creation when interface creation timeout
happens after driver init.

CRs-Fixed: 2164039
Change-Id: Ib1a9c655b5144b11d506a09268918b63f82adcc0

wmi/src/wmi_unified.c

@@ -1105,8 +1105,12 @@ static void wmi_debugfs_remove(wmi_unified_t wmi_handle)
 {
 	int i;
 	struct dentry *dentry = wmi_handle->log_info.wmi_log_debugfs_dir;
-	int id = wmi_handle->log_info.wmi_instance_id;
+	int id;
 
+	if (!wmi_handle->log_info.wmi_instance_id)
+		return;
+
+	id = wmi_handle->log_info.wmi_instance_id - 1;
 	if (dentry && (!(id < 0) || (id >= MAX_WMI_INSTANCES))) {
 		for (i = 0; i < NUM_DEBUG_INFOS; ++i) {
 			if (wmi_debugfs_infos[i].de[id])
@@ -1116,6 +1120,9 @@ static void wmi_debugfs_remove(wmi_unified_t wmi_handle)
 
 	if (dentry)
 		debugfs_remove_recursive(dentry);
+
+	if (wmi_handle->log_info.wmi_instance_id)
+		wmi_handle->log_info.wmi_instance_id--;
 }
 
 /**
@@ -1128,21 +1135,23 @@ static void wmi_debugfs_remove(wmi_unified_t wmi_handle)
  */
 static QDF_STATUS wmi_debugfs_init(wmi_unified_t wmi_handle)
 {
-	static int wmi_index;
+	int wmi_index = wmi_handle->log_info.wmi_instance_id;
 
-	if (wmi_index < MAX_WMI_INSTANCES)
+	if (wmi_index < MAX_WMI_INSTANCES) {
 		wmi_handle->log_info.wmi_log_debugfs_dir =
 			debugfs_create_dir(debugfs_dir[wmi_index], NULL);
 
-	if (wmi_handle->log_info.wmi_log_debugfs_dir == NULL) {
-		qdf_print("error while creating debugfs dir for %s\n",
-				debugfs_dir[wmi_index]);
-		return QDF_STATUS_E_FAILURE;
-	}
+		if (!wmi_handle->log_info.wmi_log_debugfs_dir) {
+			qdf_print("error while creating debugfs dir for %s\n",
+				  debugfs_dir[wmi_index]);
+			return QDF_STATUS_E_FAILURE;
+		}
 
-	wmi_debugfs_create(wmi_handle, wmi_handle->log_info.wmi_log_debugfs_dir,
-				wmi_index);
-	wmi_handle->log_info.wmi_instance_id = wmi_index++;
+		wmi_debugfs_create(wmi_handle,
+				   wmi_handle->log_info.wmi_log_debugfs_dir,
+				   wmi_index);
+		wmi_handle->log_info.wmi_instance_id++;
+	}
 
 	return QDF_STATUS_SUCCESS;
 }