Merge branch 's390-next'

Karsten Graul says:

====================
s390/net: updates 2021-11-18

Please apply the following patches to netdev's net-next tree.

Heiko provided fixes for kernel doc comments and solved some
other compiler warnings.
Julians qeth patch simplifies the rx queue handling in the code.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/ctcm_dbug.h

@@ -65,6 +65,7 @@ extern struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS];
 
 int ctcm_register_dbf_views(void);
 void ctcm_unregister_dbf_views(void);
+__printf(3, 4)
 void ctcm_dbf_longtext(enum ctcm_dbf_names dbf_nix, int level, char *text, ...);
 
 static inline const char *strtail(const char *s, int n)

drivers/s390/net/ctcm_fsms.c

@@ -1406,7 +1406,7 @@ static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg)
 
 		if (new_skb == NULL) {
 			CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR,
-				"%s(%d): skb allocation failed",
+				"%s(%s): skb allocation failed",
 						CTCM_FUNTAIL, dev->name);
 			fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev);
 					goto again;

drivers/s390/net/lcs.c

@@ -1808,19 +1808,20 @@ lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer)
 			return;
 		}
 		/* What kind of frame is it? */
-		if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL)
+		if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) {
 			/* Control frame. */
 			lcs_get_control(card, (struct lcs_cmd *) lcs_hdr);
-		else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
+		} else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET ||
 			   lcs_hdr->type == LCS_FRAME_TYPE_TR ||
-			 lcs_hdr->type == LCS_FRAME_TYPE_FDDI)
+			   lcs_hdr->type == LCS_FRAME_TYPE_FDDI) {
 			/* Normal network packet. */
 			lcs_get_skb(card, (char *)(lcs_hdr + 1),
 				    lcs_hdr->offset - offset -
 				    sizeof(struct lcs_header));
-		else
+		} else {
 			/* Unknown frame type. */
 			; // FIXME: error message ?
+		}
 		/* Proceed to next frame. */
 		offset = lcs_hdr->offset;
 		lcs_hdr->offset = LCS_ILLEGAL_OFFSET;

drivers/s390/net/qeth_core_main.c

@@ -194,9 +194,6 @@ static void qeth_clear_working_pool_list(struct qeth_card *card)
 				 &card->qdio.in_buf_pool.entry_list, list)
 		list_del(&pool_entry->list);
 
-	if (!queue)
-		return;
-
 	for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 		queue->bufs[i].pool_entry = NULL;
 }
@@ -275,8 +272,8 @@ int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 
 	QETH_CARD_TEXT(card, 2, "realcbp");
 
-	/* Defer until queue is allocated: */
-	if (!card->qdio.in_q)
+	/* Defer until pool is allocated: */
+	if (list_empty(&pool->entry_list))
 		goto out;
 
 	/* Remove entries from the pool: */
@@ -2557,14 +2554,9 @@ static int qeth_alloc_qdio_queues(struct qeth_card *card)
 		QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
 		return 0;
 
-	QETH_CARD_TEXT(card, 2, "inq");
-	card->qdio.in_q = qeth_alloc_qdio_queue();
-	if (!card->qdio.in_q)
-		goto out_nomem;
-
 	/* inbound buffer pool */
 	if (qeth_alloc_buffer_pool(card))
-		goto out_freeinq;
+		goto out_buffer_pool;
 
 	/* outbound */
 	for (i = 0; i < card->qdio.no_out_queues; ++i) {
@@ -2605,10 +2597,7 @@ static int qeth_alloc_qdio_queues(struct qeth_card *card)
 		card->qdio.out_qs[i] = NULL;
 	}
 	qeth_free_buffer_pool(card);
-out_freeinq:
-	qeth_free_qdio_queue(card->qdio.in_q);
-	card->qdio.in_q = NULL;
-out_nomem:
+out_buffer_pool:
 	atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
 	return -ENOMEM;
 }
@@ -2623,11 +2612,12 @@ static void qeth_free_qdio_queues(struct qeth_card *card)
 
 	qeth_free_cq(card);
 	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
-		if (card->qdio.in_q->bufs[j].rx_skb)
+		if (card->qdio.in_q->bufs[j].rx_skb) {
 			consume_skb(card->qdio.in_q->bufs[j].rx_skb);
+			card->qdio.in_q->bufs[j].rx_skb = NULL;
 		}
-	qeth_free_qdio_queue(card->qdio.in_q);
-	card->qdio.in_q = NULL;
+	}
+
 	/* inbound buffer pool */
 	qeth_free_buffer_pool(card);
 	/* free outbound qdio_qs */
@@ -6447,6 +6437,12 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 	qeth_determine_capabilities(card);
 	qeth_set_blkt_defaults(card);
 
+	card->qdio.in_q = qeth_alloc_qdio_queue();
+	if (!card->qdio.in_q) {
+		rc = -ENOMEM;
+		goto err_rx_queue;
+	}
+
 	card->qdio.no_out_queues = card->dev->num_tx_queues;
 	rc = qeth_update_from_chp_desc(card);
 	if (rc)
@@ -6473,6 +6469,8 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 
 err_setup_disc:
 err_chp_desc:
+	qeth_free_qdio_queue(card->qdio.in_q);
+err_rx_queue:
 	free_netdev(card->dev);
 err_card:
 	qeth_core_free_card(card);
@@ -6494,6 +6492,7 @@ static void qeth_core_remove_device(struct ccwgroup_device *gdev)
 
 	qeth_free_qdio_queues(card);
 
+	qeth_free_qdio_queue(card->qdio.in_q);
 	free_netdev(card->dev);
 	qeth_core_free_card(card);
 	put_device(&gdev->dev);

net/iucv/af_iucv.c

@@ -142,7 +142,7 @@ static inline size_t iucv_msg_length(struct iucv_message *msg)
  * iucv_sock_in_state() - check for specific states
  * @sk:		sock structure
  * @state:	first iucv sk state
- * @state:	second iucv sk state
+ * @state2:	second iucv sk state
  *
  * Returns true if the socket in either in the first or second state.
  */
@@ -172,7 +172,7 @@ static inline int iucv_below_msglim(struct sock *sk)
 			(atomic_read(&iucv->pendings) <= 0));
 }
 
-/**
+/*
  * iucv_sock_wake_msglim() - Wake up thread waiting on msg limit
  */
 static void iucv_sock_wake_msglim(struct sock *sk)
@@ -187,7 +187,7 @@ static void iucv_sock_wake_msglim(struct sock *sk)
 	rcu_read_unlock();
 }
 
-/**
+/*
  * afiucv_hs_send() - send a message through HiperSockets transport
  */
 static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock,
@@ -1831,9 +1831,9 @@ static void afiucv_swap_src_dest(struct sk_buff *skb)
 	memset(skb->data, 0, ETH_HLEN);
 }
 
-/**
+/*
  * afiucv_hs_callback_syn - react on received SYN
- **/
+ */
 static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb)
 {
 	struct af_iucv_trans_hdr *trans_hdr = iucv_trans_hdr(skb);
@@ -1896,9 +1896,9 @@ static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_callback_synack() - react on received SYN-ACK
- **/
+ */
 static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);
@@ -1917,9 +1917,9 @@ static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_callback_synfin() - react on received SYN_FIN
- **/
+ */
 static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);
@@ -1937,9 +1937,9 @@ static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_callback_fin() - react on received FIN
- **/
+ */
 static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);
@@ -1960,9 +1960,9 @@ static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_callback_win() - react on received WIN
- **/
+ */
 static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);
@@ -1978,9 +1978,9 @@ static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_callback_rx() - react on received data
- **/
+ */
 static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);
@@ -2022,11 +2022,11 @@ static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb)
 	return NET_RX_SUCCESS;
 }
 
-/**
+/*
  * afiucv_hs_rcv() - base function for arriving data through HiperSockets
  *                   transport
  *                   called from netif RX softirq
- **/
+ */
 static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
 	struct packet_type *pt, struct net_device *orig_dev)
 {
@@ -2128,10 +2128,10 @@ static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
 	return err;
 }
 
-/**
+/*
  * afiucv_hs_callback_txnotify() - handle send notifications from HiperSockets
  *                                 transport
- **/
+ */
 static void afiucv_hs_callback_txnotify(struct sock *sk, enum iucv_tx_notify n)
 {
 	struct iucv_sock *iucv = iucv_sk(sk);

net/iucv/iucv.c

@@ -276,8 +276,8 @@ static union iucv_param *iucv_param[NR_CPUS];
 static union iucv_param *iucv_param_irq[NR_CPUS];
 
 /**
- * iucv_call_b2f0
- * @code: identifier of IUCV call to CP.
+ * __iucv_call_b2f0
+ * @command: identifier of IUCV call to CP.
  * @parm: pointer to a struct iucv_parm block
  *
  * Calls CP to execute IUCV commands.
@@ -309,7 +309,7 @@ static inline int iucv_call_b2f0(int command, union iucv_param *parm)
 	return ccode == 1 ? parm->ctrl.iprcode : ccode;
 }
 
-/**
+/*
  * iucv_query_maxconn
  *
  * Determines the maximum number of connections that may be established.
@@ -493,8 +493,8 @@ static void iucv_retrieve_cpu(void *data)
 	cpumask_clear_cpu(cpu, &iucv_buffer_cpumask);
 }
 
-/**
- * iucv_setmask_smp
+/*
+ * iucv_setmask_mp
  *
  * Allow iucv interrupts on all cpus.
  */
@@ -512,7 +512,7 @@ static void iucv_setmask_mp(void)
 	cpus_read_unlock();
 }
 
-/**
+/*
  * iucv_setmask_up
  *
  * Allow iucv interrupts on a single cpu.
@@ -529,7 +529,7 @@ static void iucv_setmask_up(void)
 		smp_call_function_single(cpu, iucv_block_cpu, NULL, 1);
 }
 
-/**
+/*
  * iucv_enable
  *
  * This function makes iucv ready for use. It allocates the pathid
@@ -564,7 +564,7 @@ static int iucv_enable(void)
 	return rc;
 }
 
-/**
+/*
  * iucv_disable
  *
  * This function shuts down iucv. It disables iucv interrupts, retrieves
@@ -1347,8 +1347,9 @@ EXPORT_SYMBOL(iucv_message_send);
  * @srccls: source class of message
  * @buffer: address of send buffer or address of struct iucv_array
  * @size: length of send buffer
- * @ansbuf: address of answer buffer or address of struct iucv_array
+ * @answer: address of answer buffer or address of struct iucv_array
  * @asize: size of reply buffer
+ * @residual: ignored
  *
  * This function transmits data to another application. Data to be
  * transmitted is in a buffer. The receiver of the send is expected to
@@ -1400,13 +1401,6 @@ int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg,
 }
 EXPORT_SYMBOL(iucv_message_send2way);
 
-/**
- * iucv_path_pending
- * @data: Pointer to external interrupt buffer
- *
- * Process connection pending work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_path_pending {
 	u16 ippathid;
 	u8  ipflags1;
@@ -1420,6 +1414,13 @@ struct iucv_path_pending {
 	u8  res4[3];
 } __packed;
 
+/**
+ * iucv_path_pending
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process connection pending work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_path_pending(struct iucv_irq_data *data)
 {
 	struct iucv_path_pending *ipp = (void *) data;
@@ -1461,13 +1462,6 @@ static void iucv_path_pending(struct iucv_irq_data *data)
 	iucv_sever_pathid(ipp->ippathid, error);
 }
 
-/**
- * iucv_path_complete
- * @data: Pointer to external interrupt buffer
- *
- * Process connection complete work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_path_complete {
 	u16 ippathid;
 	u8  ipflags1;
@@ -1481,6 +1475,13 @@ struct iucv_path_complete {
 	u8  res4[3];
 } __packed;
 
+/**
+ * iucv_path_complete
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process connection complete work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_path_complete(struct iucv_irq_data *data)
 {
 	struct iucv_path_complete *ipc = (void *) data;
@@ -1492,13 +1493,6 @@ static void iucv_path_complete(struct iucv_irq_data *data)
 		path->handler->path_complete(path, ipc->ipuser);
 }
 
-/**
- * iucv_path_severed
- * @data: Pointer to external interrupt buffer
- *
- * Process connection severed work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_path_severed {
 	u16 ippathid;
 	u8  res1;
@@ -1511,6 +1505,13 @@ struct iucv_path_severed {
 	u8  res5[3];
 } __packed;
 
+/**
+ * iucv_path_severed
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process connection severed work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_path_severed(struct iucv_irq_data *data)
 {
 	struct iucv_path_severed *ips = (void *) data;
@@ -1528,13 +1529,6 @@ static void iucv_path_severed(struct iucv_irq_data *data)
 	}
 }
 
-/**
- * iucv_path_quiesced
- * @data: Pointer to external interrupt buffer
- *
- * Process connection quiesced work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_path_quiesced {
 	u16 ippathid;
 	u8  res1;
@@ -1547,6 +1541,13 @@ struct iucv_path_quiesced {
 	u8  res5[3];
 } __packed;
 
+/**
+ * iucv_path_quiesced
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process connection quiesced work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_path_quiesced(struct iucv_irq_data *data)
 {
 	struct iucv_path_quiesced *ipq = (void *) data;
@@ -1556,13 +1557,6 @@ static void iucv_path_quiesced(struct iucv_irq_data *data)
 		path->handler->path_quiesced(path, ipq->ipuser);
 }
 
-/**
- * iucv_path_resumed
- * @data: Pointer to external interrupt buffer
- *
- * Process connection resumed work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_path_resumed {
 	u16 ippathid;
 	u8  res1;
@@ -1575,6 +1569,13 @@ struct iucv_path_resumed {
 	u8  res5[3];
 } __packed;
 
+/**
+ * iucv_path_resumed
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process connection resumed work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_path_resumed(struct iucv_irq_data *data)
 {
 	struct iucv_path_resumed *ipr = (void *) data;
@@ -1584,13 +1585,6 @@ static void iucv_path_resumed(struct iucv_irq_data *data)
 		path->handler->path_resumed(path, ipr->ipuser);
 }
 
-/**
- * iucv_message_complete
- * @data: Pointer to external interrupt buffer
- *
- * Process message complete work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_message_complete {
 	u16 ippathid;
 	u8  ipflags1;
@@ -1606,6 +1600,13 @@ struct iucv_message_complete {
 	u8  res2[3];
 } __packed;
 
+/**
+ * iucv_message_complete
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process message complete work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_message_complete(struct iucv_irq_data *data)
 {
 	struct iucv_message_complete *imc = (void *) data;
@@ -1624,13 +1625,6 @@ static void iucv_message_complete(struct iucv_irq_data *data)
 	}
 }
 
-/**
- * iucv_message_pending
- * @data: Pointer to external interrupt buffer
- *
- * Process message pending work item. Called from tasklet while holding
- * iucv_table_lock.
- */
 struct iucv_message_pending {
 	u16 ippathid;
 	u8  ipflags1;
@@ -1653,6 +1647,13 @@ struct iucv_message_pending {
 	u8  res2[3];
 } __packed;
 
+/**
+ * iucv_message_pending
+ * @data: Pointer to external interrupt buffer
+ *
+ * Process message pending work item. Called from tasklet while holding
+ * iucv_table_lock.
+ */
 static void iucv_message_pending(struct iucv_irq_data *data)
 {
 	struct iucv_message_pending *imp = (void *) data;
@@ -1673,7 +1674,7 @@ static void iucv_message_pending(struct iucv_irq_data *data)
 	}
 }
 
-/**
+/*
  * iucv_tasklet_fn:
  *
  * This tasklet loops over the queue of irq buffers created by
@@ -1717,7 +1718,7 @@ static void iucv_tasklet_fn(unsigned long ignored)
 	spin_unlock(&iucv_table_lock);
 }
 
-/**
+/*
  * iucv_work_fn:
  *
  * This work function loops over the queue of path pending irq blocks
@@ -1748,9 +1749,8 @@ static void iucv_work_fn(struct work_struct *work)
 	spin_unlock_bh(&iucv_table_lock);
 }
 
-/**
+/*
  * iucv_external_interrupt
- * @code: irq code
  *
  * Handles external interrupts coming in from CP.
  * Places the interrupt buffer on a queue and schedules iucv_tasklet_fn().