diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c
index 905106579935a..0db4000dedf20 100644
--- a/drivers/misc/genwqe/card_ddcb.c
+++ b/drivers/misc/genwqe/card_ddcb.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/**
+/*
  * IBM Accelerator Family 'GenWQE'
  *
  * (C) Copyright IBM Corp. 2013
@@ -244,10 +244,13 @@ static int ddcb_requ_finished(struct genwqe_dev *cd, struct ddcb_requ *req)
 		(cd->card_state != GENWQE_CARD_USED);
 }
 
+#define RET_DDCB_APPENDED 1
+#define RET_DDCB_TAPPED   2
 /**
  * enqueue_ddcb() - Enqueue a DDCB
  * @cd:         pointer to genwqe device descriptor
  * @queue:	queue this operation should be done on
+ * @pddcb:      pointer to ddcb structure
  * @ddcb_no:    pointer to ddcb number being tapped
  *
  * Start execution of DDCB by tapping or append to queue via NEXT
@@ -259,9 +262,6 @@ static int ddcb_requ_finished(struct genwqe_dev *cd, struct ddcb_requ *req)
  * Return: 1 if new DDCB is appended to previous
  *         2 if DDCB queue is tapped via register/simulation
  */
-#define RET_DDCB_APPENDED 1
-#define RET_DDCB_TAPPED   2
-
 static int enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_queue *queue,
 			struct ddcb *pddcb, int ddcb_no)
 {
@@ -316,6 +316,8 @@ static int enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_queue *queue,
 
 /**
  * copy_ddcb_results() - Copy output state from real DDCB to request
+ * @req:        pointer to requsted DDCB parameters
+ * @ddcb_no:    pointer to ddcb number being tapped
  *
  * Copy DDCB ASV to request struct. There is no endian
  * conversion made, since data structure in ASV is still
@@ -356,6 +358,7 @@ static void copy_ddcb_results(struct ddcb_requ *req, int ddcb_no)
 /**
  * genwqe_check_ddcb_queue() - Checks DDCB queue for completed work equests.
  * @cd:         pointer to genwqe device descriptor
+ * @queue:	queue to be checked
  *
  * Return: Number of DDCBs which were finished
  */
@@ -553,6 +556,8 @@ int __genwqe_wait_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req)
 /**
  * get_next_ddcb() - Get next available DDCB
  * @cd:         pointer to genwqe device descriptor
+ * @queue:      DDCB queue
+ * @num:        internal DDCB number
  *
  * DDCB's content is completely cleared but presets for PRE and
  * SEQNUM. This function must only be called when ddcb_lock is held.
@@ -900,7 +905,7 @@ int __genwqe_enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req,
 /**
  * __genwqe_execute_raw_ddcb() - Setup and execute DDCB
  * @cd:         pointer to genwqe device descriptor
- * @req:        user provided DDCB request
+ * @cmd:        user provided DDCB command
  * @f_flags:    file mode: blocking, non-blocking
  */
 int __genwqe_execute_raw_ddcb(struct genwqe_dev *cd,
@@ -965,6 +970,7 @@ int __genwqe_execute_raw_ddcb(struct genwqe_dev *cd,
 
 /**
  * genwqe_next_ddcb_ready() - Figure out if the next DDCB is already finished
+ * @cd:         pointer to genwqe device descriptor
  *
  * We use this as condition for our wait-queue code.
  */
@@ -993,6 +999,7 @@ static int genwqe_next_ddcb_ready(struct genwqe_dev *cd)
 
 /**
  * genwqe_ddcbs_in_flight() - Check how many DDCBs are in flight
+ * @cd:         pointer to genwqe device descriptor
  *
  * Keep track on the number of DDCBs which ware currently in the
  * queue. This is needed for statistics as well as conditon if we want
@@ -1171,6 +1178,7 @@ static irqreturn_t genwqe_vf_isr(int irq, void *dev_id)
 
 /**
  * genwqe_card_thread() - Work thread for the DDCB queue
+ * @data:         pointer to genwqe device descriptor
  *
  * The idea is to check if there are DDCBs in processing. If there are
  * some finished DDCBs, we process them and wakeup the
@@ -1299,6 +1307,7 @@ int genwqe_setup_service_layer(struct genwqe_dev *cd)
 
 /**
  * queue_wake_up_all() - Handles fatal error case
+ * @cd:         pointer to genwqe device descriptor
  *
  * The PCI device got unusable and we have to stop all pending
  * requests as fast as we can. The code after this must purge the
@@ -1323,6 +1332,7 @@ static int queue_wake_up_all(struct genwqe_dev *cd)
 
 /**
  * genwqe_finish_queue() - Remove any genwqe devices and user-interfaces
+ * @cd:         pointer to genwqe device descriptor
  *
  * Relies on the pre-condition that there are no users of the card
  * device anymore e.g. with open file-descriptors.
