1 files changed, 31 insertions, 45 deletions

diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
index 738ad26c74a..6bcfbbb20f0 100644
--- a/drivers/s390/net/ctcm_sysfs.c
+++ b/drivers/s390/net/ctcm_sysfs.c
@@ -1,6 +1,4 @@
 /*
- * drivers/s390/net/ctcm_sysfs.c
- *
  * Copyright IBM Corp. 2007, 2007
  * Authors:	Peter Tiedemann (ptiedem@de.ibm.com)
  *
@@ -13,7 +11,9 @@
 #define KMSG_COMPONENT "ctcm"
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
+#include <linux/device.h>
 #include <linux/sysfs.h>
+#include <linux/slab.h>
 #include "ctcm_main.h"
 
 /*
@@ -34,16 +34,19 @@ static ssize_t ctcm_buffer_write(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct net_device *ndev;
-	int bs1;
+	unsigned int bs1;
 	struct ctcm_priv *priv = dev_get_drvdata(dev);
+	int rc;
 
-	if (!(priv && priv->channel[READ] &&
-			(ndev = priv->channel[READ]->netdev))) {
+	ndev = priv->channel[CTCM_READ]->netdev;
+	if (!(priv && priv->channel[CTCM_READ] && ndev)) {
 		CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
 		return -ENODEV;
 	}
 
-	sscanf(buf, "%u", &bs1);
+	rc = sscanf(buf, "%u", &bs1);
+	if (rc != 1)
+		goto einval;
 	if (bs1 > CTCM_BUFSIZE_LIMIT)
 					goto einval;
 	if (bs1 < (576 + LL_HEADER_LENGTH + 2))
@@ -54,12 +57,12 @@ static ssize_t ctcm_buffer_write(struct device *dev,
 	    (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
 					goto einval;
 
-	priv->channel[READ]->max_bufsize = bs1;
-	priv->channel[WRITE]->max_bufsize = bs1;
+	priv->channel[CTCM_READ]->max_bufsize = bs1;
+	priv->channel[CTCM_WRITE]->max_bufsize = bs1;
 	if (!(ndev->flags & IFF_RUNNING))
 		ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
-	priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
-	priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
+	priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
+	priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
 
 	CTCM_DBF_DEV(SETUP, ndev, buf);
 	return count;
@@ -84,9 +87,9 @@ static void ctcm_print_statistics(struct ctcm_priv *priv)
 	p += sprintf(p, "  Device FSM state: %s\n",
 		     fsm_getstate_str(priv->fsm));
 	p += sprintf(p, "  RX channel FSM state: %s\n",
-		     fsm_getstate_str(priv->channel[READ]->fsm));
+		     fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
 	p += sprintf(p, "  TX channel FSM state: %s\n",
-		     fsm_getstate_str(priv->channel[WRITE]->fsm));
+		     fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
 	p += sprintf(p, "  Max. TX buffer used: %ld\n",
 		     priv->channel[WRITE]->prof.maxmulti);
 	p += sprintf(p, "  Max. chained SKBs: %ld\n",
@@ -101,16 +104,18 @@ static void ctcm_print_statistics(struct ctcm_priv *priv)
 		     priv->channel[WRITE]->prof.tx_time);
 
 	printk(KERN_INFO "Statistics for %s:\n%s",
-				priv->channel[WRITE]->netdev->name, sbuf);
+				priv->channel[CTCM_WRITE]->netdev->name, sbuf);
 	kfree(sbuf);
 	return;
 }
 
 static ssize_t stats_show(struct device *dev,
-				struct device_attribute *attr, char *buf)
+			  struct device_attribute *attr, char *buf)
 {
+	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
 	struct ctcm_priv *priv = dev_get_drvdata(dev);
-	if (!priv)
+
+	if (!priv || gdev->state != CCWGROUP_ONLINE)
 		return -ENODEV;
 	ctcm_print_statistics(priv);
 	return sprintf(buf, "0\n");
@@ -124,7 +129,7 @@ static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
 		return -ENODEV;
 	/* Reset statistics */
 	memset(&priv->channel[WRITE]->prof, 0,
-				sizeof(priv->channel[WRITE]->prof));
+				sizeof(priv->channel[CTCM_WRITE]->prof));
 	return count;
 }
 
@@ -141,13 +146,14 @@ static ssize_t ctcm_proto_show(struct device *dev,
 static ssize_t ctcm_proto_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
-	int value;
+	int value, rc;
 	struct ctcm_priv *priv = dev_get_drvdata(dev);
 
 	if (!priv)
 		return -ENODEV;
-	sscanf(buf, "%u", &value);
-	if (!((value == CTCM_PROTO_S390)  ||
+	rc = sscanf(buf, "%d", &value);
+	if ((rc != 1) ||
+	    !((value == CTCM_PROTO_S390)  ||
 	      (value == CTCM_PROTO_LINUX) ||
 	      (value == CTCM_PROTO_MPC) ||
 	      (value == CTCM_PROTO_OS390)))
@@ -158,7 +164,7 @@ static ssize_t ctcm_proto_store(struct device *dev,
 	return count;
 }
 
-const char *ctcm_type[] = {
+static const char *ctcm_type[] = {
 	"not a channel",
 	"CTC/A",
 	"FICON channel",
@@ -189,34 +195,14 @@ static struct attribute *ctcm_attr[] = {
 	&dev_attr_protocol.attr,
 	&dev_attr_type.attr,
 	&dev_attr_buffer.attr,
+	&dev_attr_stats.attr,
 	NULL,
 };
 
 static struct attribute_group ctcm_attr_group = {
 	.attrs = ctcm_attr,
 };
-
-int ctcm_add_attributes(struct device *dev)
-{
-	int rc;
-
-	rc = device_create_file(dev, &dev_attr_stats);
-
-	return rc;
-}
-
-void ctcm_remove_attributes(struct device *dev)
-{
-	device_remove_file(dev, &dev_attr_stats);
-}
-
-int ctcm_add_files(struct device *dev)
-{
-	return sysfs_create_group(&dev->kobj, &ctcm_attr_group);
-}
-
-void ctcm_remove_files(struct device *dev)
-{
-	sysfs_remove_group(&dev->kobj, &ctcm_attr_group);
-}
-
+const struct attribute_group *ctcm_attr_groups[] = {
+	&ctcm_attr_group,
+	NULL,
+};