Merge branch 's390-net-updates-2023-02-06'

Alexandra Winter says:

====================
s390/net: updates 2023-02-06

Just maintenance patches, no functional changes.
If you disagree with patch 4, we can leave it out.
We prefer scnprintf, but no strong opinion.
====================

Link: https://lore.kernel.org/r/20230209110424.1707501-1-wintera@linux.ibm.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/s390/net/ctcm_mpc.c

@@ -896,8 +896,9 @@ void mpc_group_ready(unsigned long adev)
 		grp->estconnfunc(grp->port_num, 0,
 				    grp->group_max_buflen);
 		grp->estconnfunc = NULL;
-	} else 	if (grp->allochanfunc)
+	} else if (grp->allochanfunc) {
 		grp->allochanfunc(grp->port_num, grp->group_max_buflen);
+	}
 
 	grp->send_qllc_disc = 1;
 	grp->changed_side = 0;

drivers/s390/net/qeth_core_main.c

@@ -2801,7 +2801,9 @@ static void qeth_print_status_message(struct qeth_card *card)
 		 * of the level OSA sets the first character to zero
 		 * */
 		if (!card->info.mcl_level[0]) {
-			sprintf(card->info.mcl_level, "%02x%02x",
+			scnprintf(card->info.mcl_level,
+				  sizeof(card->info.mcl_level),
+				  "%02x%02x",
 				  card->info.mcl_level[2],
 				  card->info.mcl_level[3]);
 			break;
@@ -6090,7 +6092,7 @@ void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
 	if (!debug_level_enabled(id, level))
 		return;
 	va_start(args, fmt);
-	vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
+	vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
 	va_end(args);
 	debug_text_event(id, level, dbf_txt_buf);
 }
@@ -6330,7 +6332,7 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 		goto err_dev;
 	}
 
-	snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
+	scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
 		  dev_name(&gdev->dev));
 	card->debug = qeth_get_dbf_entry(dbf_name);
 	if (!card->debug) {

drivers/s390/net/qeth_core_sys.c

@@ -23,15 +23,15 @@ static ssize_t qeth_dev_state_show(struct device *dev,
 
 	switch (card->state) {
 	case CARD_STATE_DOWN:
-		return sprintf(buf, "DOWN\n");
+		return sysfs_emit(buf, "DOWN\n");
 	case CARD_STATE_SOFTSETUP:
 		if (card->dev->flags & IFF_UP)
-			return sprintf(buf, "UP (LAN %s)\n",
-				       netif_carrier_ok(card->dev) ? "ONLINE" :
-								     "OFFLINE");
-		return sprintf(buf, "SOFTSETUP\n");
+			return sysfs_emit(buf, "UP (LAN %s)\n",
+					  netif_carrier_ok(card->dev) ?
+					  "ONLINE" : "OFFLINE");
+		return sysfs_emit(buf, "SOFTSETUP\n");
 	default:
-		return sprintf(buf, "UNKNOWN\n");
+		return sysfs_emit(buf, "UNKNOWN\n");
 	}
 }
 
@@ -42,7 +42,7 @@ static ssize_t qeth_dev_chpid_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%02X\n", card->info.chpid);
+	return sysfs_emit(buf, "%02X\n", card->info.chpid);
 }
 
 static DEVICE_ATTR(chpid, 0444, qeth_dev_chpid_show, NULL);
@@ -52,7 +52,7 @@ static ssize_t qeth_dev_if_name_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%s\n", netdev_name(card->dev));
+	return sysfs_emit(buf, "%s\n", netdev_name(card->dev));
 }
 
 static DEVICE_ATTR(if_name, 0444, qeth_dev_if_name_show, NULL);
@@ -62,7 +62,7 @@ static ssize_t qeth_dev_card_type_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%s\n", qeth_get_cardname_short(card));
+	return sysfs_emit(buf, "%s\n", qeth_get_cardname_short(card));
 }
 
 static DEVICE_ATTR(card_type, 0444, qeth_dev_card_type_show, NULL);
@@ -86,7 +86,7 @@ static ssize_t qeth_dev_inbuf_size_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%s\n", qeth_get_bufsize_str(card));
+	return sysfs_emit(buf, "%s\n", qeth_get_bufsize_str(card));
 }
 
 static DEVICE_ATTR(inbuf_size, 0444, qeth_dev_inbuf_size_show, NULL);
@@ -96,7 +96,7 @@ static ssize_t qeth_dev_portno_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->dev->dev_port);
+	return sysfs_emit(buf, "%i\n", card->dev->dev_port);
 }
 
 static ssize_t qeth_dev_portno_store(struct device *dev,
@@ -134,7 +134,7 @@ static DEVICE_ATTR(portno, 0644, qeth_dev_portno_show, qeth_dev_portno_store);
 static ssize_t qeth_dev_portname_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "no portname required\n");
+	return sysfs_emit(buf, "no portname required\n");
 }
 
 static ssize_t qeth_dev_portname_store(struct device *dev,
@@ -157,18 +157,18 @@ static ssize_t qeth_dev_prioqing_show(struct device *dev,
 
 	switch (card->qdio.do_prio_queueing) {
 	case QETH_PRIO_Q_ING_PREC:
-		return sprintf(buf, "%s\n", "by precedence");
+		return sysfs_emit(buf, "%s\n", "by precedence");
 	case QETH_PRIO_Q_ING_TOS:
-		return sprintf(buf, "%s\n", "by type of service");
+		return sysfs_emit(buf, "%s\n", "by type of service");
 	case QETH_PRIO_Q_ING_SKB:
-		return sprintf(buf, "%s\n", "by skb-priority");
+		return sysfs_emit(buf, "%s\n", "by skb-priority");
 	case QETH_PRIO_Q_ING_VLAN:
-		return sprintf(buf, "%s\n", "by VLAN headers");
+		return sysfs_emit(buf, "%s\n", "by VLAN headers");
 	case QETH_PRIO_Q_ING_FIXED:
-		return sprintf(buf, "always queue %i\n",
+		return sysfs_emit(buf, "always queue %i\n",
 			       card->qdio.default_out_queue);
 	default:
-		return sprintf(buf, "disabled\n");
+		return sysfs_emit(buf, "disabled\n");
 	}
 }
 
@@ -242,7 +242,7 @@ static ssize_t qeth_dev_bufcnt_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->qdio.in_buf_pool.buf_count);
+	return sysfs_emit(buf, "%i\n", card->qdio.in_buf_pool.buf_count);
 }
 
 static ssize_t qeth_dev_bufcnt_store(struct device *dev,
@@ -298,7 +298,7 @@ static DEVICE_ATTR(recover, 0200, NULL, qeth_dev_recover_store);
 static ssize_t qeth_dev_performance_stats_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
-	return sprintf(buf, "1\n");
+	return sysfs_emit(buf, "1\n");
 }
 
 static ssize_t qeth_dev_performance_stats_store(struct device *dev,
@@ -335,7 +335,7 @@ static ssize_t qeth_dev_layer2_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->options.layer);
+	return sysfs_emit(buf, "%i\n", card->options.layer);
 }
 
 static ssize_t qeth_dev_layer2_store(struct device *dev,
@@ -470,23 +470,25 @@ static ssize_t qeth_dev_switch_attrs_show(struct device *dev,
 	int	rc = 0;
 
 	if (!qeth_card_hw_is_reachable(card))
-		return sprintf(buf, "n/a\n");
+		return sysfs_emit(buf, "n/a\n");
 
 	rc = qeth_query_switch_attributes(card, &sw_info);
 	if (rc)
 		return rc;
 
 	if (!sw_info.capabilities)
-		rc = sprintf(buf, "unknown");
+		rc = sysfs_emit(buf, "unknown");
 
 	if (sw_info.capabilities & QETH_SWITCH_FORW_802_1)
-		rc = sprintf(buf, (sw_info.settings & QETH_SWITCH_FORW_802_1 ?
+		rc = sysfs_emit(buf,
+				(sw_info.settings & QETH_SWITCH_FORW_802_1 ?
 				"[802.1]" : "802.1"));
 	if (sw_info.capabilities & QETH_SWITCH_FORW_REFL_RELAY)
-		rc += sprintf(buf + rc,
-			(sw_info.settings & QETH_SWITCH_FORW_REFL_RELAY ?
+		rc += sysfs_emit_at(buf, rc,
+				    (sw_info.settings &
+				    QETH_SWITCH_FORW_REFL_RELAY ?
 				    " [rr]" : " rr"));
-	rc += sprintf(buf + rc, "\n");
+	rc += sysfs_emit_at(buf, rc, "\n");
 
 	return rc;
 }
@@ -573,7 +575,7 @@ static ssize_t qeth_dev_blkt_total_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->info.blkt.time_total);
+	return sysfs_emit(buf, "%i\n", card->info.blkt.time_total);
 }
 
 static ssize_t qeth_dev_blkt_total_store(struct device *dev,
@@ -593,7 +595,7 @@ static ssize_t qeth_dev_blkt_inter_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->info.blkt.inter_packet);
+	return sysfs_emit(buf, "%i\n", card->info.blkt.inter_packet);
 }
 
 static ssize_t qeth_dev_blkt_inter_store(struct device *dev,
@@ -613,7 +615,7 @@ static ssize_t qeth_dev_blkt_inter_jumbo_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->info.blkt.inter_packet_jumbo);
+	return sysfs_emit(buf, "%i\n", card->info.blkt.inter_packet_jumbo);
 }
 
 static ssize_t qeth_dev_blkt_inter_jumbo_store(struct device *dev,

drivers/s390/net/qeth_ethtool.c

@@ -172,7 +172,7 @@ static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 		qeth_add_stat_strings(&data, prefix, card_stats,
 				      CARD_STATS_LEN);
 		for (i = 0; i < card->qdio.no_out_queues; i++) {
-			snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
+			scnprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
 			qeth_add_stat_strings(&data, prefix, txq_stats,
 					      TXQ_STATS_LEN);
 		}
@@ -192,7 +192,7 @@ static void qeth_get_drvinfo(struct net_device *dev,
 		sizeof(info->driver));
 	strscpy(info->fw_version, card->info.mcl_level,
 		sizeof(info->fw_version));
-	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
+	scnprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
 		  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
 }
 

drivers/s390/net/qeth_l2_main.c

@@ -1255,37 +1255,38 @@ static void qeth_bridge_emit_host_event(struct qeth_card *card,
 
 	switch (evtype) {
 	case anev_reg_unreg:
-		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
+		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
 			  (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
 			  ? "deregister" : "register");
 		env[i] = str[i]; i++;
 		if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
-			snprintf(str[i], sizeof(str[i]), "VLAN=%d",
+			scnprintf(str[i], sizeof(str[i]), "VLAN=%d",
 				  addr_lnid->lnid);
 			env[i] = str[i]; i++;
 		}
 		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
-			snprintf(str[i], sizeof(str[i]), "MAC=%pM",
+			scnprintf(str[i], sizeof(str[i]), "MAC=%pM",
 				  addr_lnid->mac);
 			env[i] = str[i]; i++;
 		}
-		snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
+		scnprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
 			  token->cssid, token->ssid, token->devnum);
 		env[i] = str[i]; i++;
-		snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
+		scnprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
 		env[i] = str[i]; i++;
-		snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
+		scnprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
 			  token->chpid);
 		env[i] = str[i]; i++;
-		snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
+		scnprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x",
+			  token->chid);
 		env[i] = str[i]; i++;
 		break;
 	case anev_abort:
-		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
+		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
 		env[i] = str[i]; i++;
 		break;
 	case anev_reset:
-		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
+		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
 		env[i] = str[i]; i++;
 		break;
 	}
@@ -1314,13 +1315,13 @@ static void qeth_bridge_state_change_worker(struct work_struct *work)
 		NULL
 	};
 
-	snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
-	snprintf(env_role, sizeof(env_role), "ROLE=%s",
+	scnprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
+	scnprintf(env_role, sizeof(env_role), "ROLE=%s",
 		  (data->role == QETH_SBP_ROLE_NONE) ? "none" :
 		  (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
 		  (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
 		  "<INVALID>");
-	snprintf(env_state, sizeof(env_state), "STATE=%s",
+	scnprintf(env_state, sizeof(env_state), "STATE=%s",
 		  (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
 		  (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
 		  (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :

drivers/s390/net/qeth_l2_sys.c

@@ -19,7 +19,7 @@ static ssize_t qeth_bridge_port_role_state_show(struct device *dev,
 	char *word;
 
 	if (!qeth_bridgeport_allowed(card))
-		return sprintf(buf, "n/a (VNIC characteristics)\n");
+		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
 
 	mutex_lock(&card->sbp_lock);
 	if (qeth_card_hw_is_reachable(card) &&
@@ -53,7 +53,7 @@ static ssize_t qeth_bridge_port_role_state_show(struct device *dev,
 			QETH_CARD_TEXT_(card, 2, "SBP%02x:%02x",
 				card->options.sbp.role, state);
 		else
-			rc = sprintf(buf, "%s\n", word);
+			rc = sysfs_emit(buf, "%s\n", word);
 	}
 	mutex_unlock(&card->sbp_lock);
 
@@ -66,7 +66,7 @@ static ssize_t qeth_bridge_port_role_show(struct device *dev,
 	struct qeth_card *card = dev_get_drvdata(dev);
 
 	if (!qeth_bridgeport_allowed(card))
-		return sprintf(buf, "n/a (VNIC characteristics)\n");
+		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
 
 	return qeth_bridge_port_role_state_show(dev, attr, buf, 0);
 }
@@ -117,7 +117,7 @@ static ssize_t qeth_bridge_port_state_show(struct device *dev,
 	struct qeth_card *card = dev_get_drvdata(dev);
 
 	if (!qeth_bridgeport_allowed(card))
-		return sprintf(buf, "n/a (VNIC characteristics)\n");
+		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
 
 	return qeth_bridge_port_role_state_show(dev, attr, buf, 1);
 }
@@ -132,11 +132,11 @@ static ssize_t qeth_bridgeport_hostnotification_show(struct device *dev,
 	int enabled;
 
 	if (!qeth_bridgeport_allowed(card))
-		return sprintf(buf, "n/a (VNIC characteristics)\n");
+		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
 
 	enabled = card->options.sbp.hostnotification;
 
-	return sprintf(buf, "%d\n", enabled);
+	return sysfs_emit(buf, "%d\n", enabled);
 }
 
 static ssize_t qeth_bridgeport_hostnotification_store(struct device *dev,
@@ -180,7 +180,7 @@ static ssize_t qeth_bridgeport_reflect_show(struct device *dev,
 	char *state;
 
 	if (!qeth_bridgeport_allowed(card))
-		return sprintf(buf, "n/a (VNIC characteristics)\n");
+		return sysfs_emit(buf, "n/a (VNIC characteristics)\n");
 
 	if (card->options.sbp.reflect_promisc) {
 		if (card->options.sbp.reflect_promisc_primary)
@@ -190,7 +190,7 @@ static ssize_t qeth_bridgeport_reflect_show(struct device *dev,
 	} else
 		state = "none";
 
-	return sprintf(buf, "%s\n", state);
+	return sysfs_emit(buf, "%s\n", state);
 }
 
 static ssize_t qeth_bridgeport_reflect_store(struct device *dev,
@@ -280,10 +280,10 @@ static ssize_t qeth_vnicc_timeout_show(struct device *dev,
 
 	rc = qeth_l2_vnicc_get_timeout(card, &timeout);
 	if (rc == -EBUSY)
-		return sprintf(buf, "n/a (BridgePort)\n");
+		return sysfs_emit(buf, "n/a (BridgePort)\n");
 	if (rc == -EOPNOTSUPP)
-		return sprintf(buf, "n/a\n");
-	return rc ? rc : sprintf(buf, "%d\n", timeout);
+		return sysfs_emit(buf, "n/a\n");
+	return rc ? rc : sysfs_emit(buf, "%d\n", timeout);
 }
 
 /* change timeout setting */
@@ -318,10 +318,10 @@ static ssize_t qeth_vnicc_char_show(struct device *dev,
 	rc = qeth_l2_vnicc_get_state(card, vnicc, &state);
 
 	if (rc == -EBUSY)
-		return sprintf(buf, "n/a (BridgePort)\n");
+		return sysfs_emit(buf, "n/a (BridgePort)\n");
 	if (rc == -EOPNOTSUPP)
-		return sprintf(buf, "n/a\n");
-	return rc ? rc : sprintf(buf, "%d\n", state);
+		return sysfs_emit(buf, "n/a\n");
+	return rc ? rc : sysfs_emit(buf, "%d\n", state);
 }
 
 /* change setting of characteristic */

drivers/s390/net/qeth_l3_main.c

@@ -19,6 +19,7 @@
 #include <linux/etherdevice.h>
 #include <linux/ip.h>
 #include <linux/in.h>
+#include <linux/inet.h>
 #include <linux/ipv6.h>
 #include <linux/inetdevice.h>
 #include <linux/igmp.h>
@@ -46,9 +47,9 @@ int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
 			     char *buf)
 {
 	if (proto == QETH_PROT_IPV4)
-		return sprintf(buf, "%pI4", addr);
+		return scnprintf(buf, INET_ADDRSTRLEN, "%pI4", addr);
 	else
-		return sprintf(buf, "%pI6", addr);
+		return scnprintf(buf, INET6_ADDRSTRLEN, "%pI6", addr);
 }
 
 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
@@ -158,7 +159,7 @@ static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 {
 	int rc = 0;
 	struct qeth_ipaddr *addr;
-	char buf[40];
+	char buf[INET6_ADDRSTRLEN];
 
 	if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 		QETH_CARD_TEXT(card, 2, "addrxip");

drivers/s390/net/qeth_l3_sys.c

@@ -32,26 +32,26 @@ static ssize_t qeth_l3_dev_route_show(struct qeth_card *card,
 {
 	switch (route->type) {
 	case PRIMARY_ROUTER:
-		return sprintf(buf, "%s\n", "primary router");
+		return sysfs_emit(buf, "%s\n", "primary router");
 	case SECONDARY_ROUTER:
-		return sprintf(buf, "%s\n", "secondary router");
+		return sysfs_emit(buf, "%s\n", "secondary router");
 	case MULTICAST_ROUTER:
 		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
-			return sprintf(buf, "%s\n", "multicast router+");
+			return sysfs_emit(buf, "%s\n", "multicast router+");
 		else
-			return sprintf(buf, "%s\n", "multicast router");
+			return sysfs_emit(buf, "%s\n", "multicast router");
 	case PRIMARY_CONNECTOR:
 		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
-			return sprintf(buf, "%s\n", "primary connector+");
+			return sysfs_emit(buf, "%s\n", "primary connector+");
 		else
-			return sprintf(buf, "%s\n", "primary connector");
+			return sysfs_emit(buf, "%s\n", "primary connector");
 	case SECONDARY_CONNECTOR:
 		if (card->info.broadcast_capable == QETH_BROADCAST_WITHOUT_ECHO)
-			return sprintf(buf, "%s\n", "secondary connector+");
+			return sysfs_emit(buf, "%s\n", "secondary connector+");
 		else
-			return sprintf(buf, "%s\n", "secondary connector");
+			return sysfs_emit(buf, "%s\n", "secondary connector");
 	default:
-		return sprintf(buf, "%s\n", "no");
+		return sysfs_emit(buf, "%s\n", "no");
 	}
 }
 
@@ -138,7 +138,7 @@ static ssize_t qeth_l3_dev_sniffer_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%i\n", card->options.sniffer ? 1 : 0);
+	return sysfs_emit(buf, "%i\n", card->options.sniffer ? 1 : 0);
 }
 
 static ssize_t qeth_l3_dev_sniffer_store(struct device *dev,
@@ -200,7 +200,7 @@ static ssize_t qeth_l3_dev_hsuid_show(struct device *dev,
 
 	memcpy(tmp_hsuid, card->options.hsuid, sizeof(tmp_hsuid));
 	EBCASC(tmp_hsuid, 8);
-	return sprintf(buf, "%s\n", tmp_hsuid);
+	return sysfs_emit(buf, "%s\n", tmp_hsuid);
 }
 
 static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
@@ -252,7 +252,7 @@ static ssize_t qeth_l3_dev_hsuid_store(struct device *dev,
 		goto out;
 	}
 
-	snprintf(card->options.hsuid, sizeof(card->options.hsuid),
+	scnprintf(card->options.hsuid, sizeof(card->options.hsuid),
 		  "%-8s", tmp);
 	ASCEBC(card->options.hsuid, 8);
 	memcpy(card->dev->perm_addr, card->options.hsuid, 9);
@@ -285,7 +285,7 @@ static ssize_t qeth_l3_dev_ipato_enable_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%u\n", card->ipato.enabled ? 1 : 0);
+	return sysfs_emit(buf, "%u\n", card->ipato.enabled ? 1 : 0);
 }
 
 static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
@@ -330,7 +330,7 @@ static ssize_t qeth_l3_dev_ipato_invert4_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%u\n", card->ipato.invert4 ? 1 : 0);
+	return sysfs_emit(buf, "%u\n", card->ipato.invert4 ? 1 : 0);
 }
 
 static ssize_t qeth_l3_dev_ipato_invert4_store(struct device *dev,
@@ -367,35 +367,21 @@ static ssize_t qeth_l3_dev_ipato_add_show(char *buf, struct qeth_card *card,
 			enum qeth_prot_versions proto)
 {
 	struct qeth_ipato_entry *ipatoe;
-	int str_len = 0;
+	char addr_str[INET6_ADDRSTRLEN];
+	int offset = 0;
 
 	mutex_lock(&card->ip_lock);
 	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
-		char addr_str[40];
-		int entry_len;
-
 		if (ipatoe->proto != proto)
 			continue;
 
-		entry_len = qeth_l3_ipaddr_to_string(proto, ipatoe->addr,
-						     addr_str);
-		if (entry_len < 0)
-			continue;
-
-		/* Append /%mask to the entry: */
-		entry_len += 1 + ((proto == QETH_PROT_IPV4) ? 2 : 3);
-		/* Enough room to format %entry\n into null terminated page? */
-		if (entry_len + 1 > PAGE_SIZE - str_len - 1)
-			break;
-
-		entry_len = scnprintf(buf, PAGE_SIZE - str_len,
-				      "%s/%i\n", addr_str, ipatoe->mask_bits);
-		str_len += entry_len;
-		buf += entry_len;
+		qeth_l3_ipaddr_to_string(proto, ipatoe->addr, addr_str);
+		offset += sysfs_emit_at(buf, offset, "%s/%i\n",
+					addr_str, ipatoe->mask_bits);
 	}
 	mutex_unlock(&card->ip_lock);
 
-	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
+	return offset ? offset : sysfs_emit(buf, "\n");
 }
 
 static ssize_t qeth_l3_dev_ipato_add4_show(struct device *dev,
@@ -413,7 +399,7 @@ static int qeth_l3_parse_ipatoe(const char *buf, enum qeth_prot_versions proto,
 	int rc;
 
 	/* Expected input pattern: %addr/%mask */
-	sep = strnchr(buf, 40, '/');
+	sep = strnchr(buf, INET6_ADDRSTRLEN, '/');
 	if (!sep)
 		return -EINVAL;
 
@@ -501,7 +487,7 @@ static ssize_t qeth_l3_dev_ipato_invert6_show(struct device *dev,
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%u\n", card->ipato.invert6 ? 1 : 0);
+	return sysfs_emit(buf, "%u\n", card->ipato.invert6 ? 1 : 0);
 }
 
 static ssize_t qeth_l3_dev_ipato_invert6_store(struct device *dev,
@@ -586,35 +572,22 @@ static ssize_t qeth_l3_dev_ip_add_show(struct device *dev, char *buf,
 				       enum qeth_ip_types type)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
+	char addr_str[INET6_ADDRSTRLEN];
 	struct qeth_ipaddr *ipaddr;
-	int str_len = 0;
+	int offset = 0;
 	int i;
 
 	mutex_lock(&card->ip_lock);
 	hash_for_each(card->ip_htable, i, ipaddr, hnode) {
-		char addr_str[40];
-		int entry_len;
-
 		if (ipaddr->proto != proto || ipaddr->type != type)
 			continue;
 
-		entry_len = qeth_l3_ipaddr_to_string(proto, (u8 *)&ipaddr->u,
-						     addr_str);
-		if (entry_len < 0)
-			continue;
-
-		/* Enough room to format %addr\n into null terminated page? */
-		if (entry_len + 1 > PAGE_SIZE - str_len - 1)
-			break;
-
-		entry_len = scnprintf(buf, PAGE_SIZE - str_len, "%s\n",
-				      addr_str);
-		str_len += entry_len;
-		buf += entry_len;
+		qeth_l3_ipaddr_to_string(proto, (u8 *)&ipaddr->u, addr_str);
+		offset += sysfs_emit_at(buf, offset, "%s\n", addr_str);
 	}
 	mutex_unlock(&card->ip_lock);
 
-	return str_len ? str_len : scnprintf(buf, PAGE_SIZE, "\n");
+	return offset ? offset : sysfs_emit(buf, "\n");
 }
 
 static ssize_t qeth_l3_dev_vipa_add4_show(struct device *dev,