[PATCH] s390: remove redundant and useless code in qeth

[patch 3/3] s390: remove redundant and useless code in qeth

From: Frank Pavlic <pavlic@de.ibm.com>
	- remove redundant and useless code in qeth for
	  procfs operations.
	- update Revision numbers
Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>

diffstat:
 qeth_main.c |    6 -
 qeth_mpc.c  |    2
 qeth_mpc.h  |    2
 qeth_proc.c |  250 ++++++------------------------------------------------------
 qeth_sys.c  |    4
 qeth_tso.h  |    4
 6 files changed, 38 insertions(+), 230 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 29 insertions, 221 deletions

diff --git a/drivers/s390/net/qeth_proc.c b/drivers/s390/net/qeth_proc.c
index f2ccfea8fdb8..7bf35098831e 100644
--- a/drivers/s390/net/qeth_proc.c
+++ b/drivers/s390/net/qeth_proc.c
@@ -1,6 +1,6 @@
 /*
  *
- * linux/drivers/s390/net/qeth_fs.c ($Revision: 1.13 $)
+ * linux/drivers/s390/net/qeth_fs.c ($Revision: 1.16 $)
  *
  * Linux on zSeries OSA Express and HiperSockets support
  * This file contains code related to procfs.
@@ -21,7 +21,7 @@
 #include "qeth_mpc.h"
 #include "qeth_fs.h"
 
-const char *VERSION_QETH_PROC_C = "$Revision: 1.13 $";
+const char *VERSION_QETH_PROC_C = "$Revision: 1.16 $";
 
 /***** /proc/qeth *****/
 #define QETH_PROCFILE_NAME "qeth"
@@ -30,30 +30,26 @@ static struct proc_dir_entry *qeth_procfile;
 static int
 qeth_procfile_seq_match(struct device *dev, void *data)
 {
-	return 1;
+	return(dev ? 1 : 0);
 }
 
 static void *
 qeth_procfile_seq_start(struct seq_file *s, loff_t *offset)
 {
-	struct device *dev;
-	loff_t nr;
-
+	struct device *dev = NULL;
+	loff_t nr = 0;
+	
 	down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-
-	nr = *offset;
-	if (nr == 0)
+	if (*offset == 0)
 		return SEQ_START_TOKEN;
-
-	dev = driver_find_device(&qeth_ccwgroup_driver.driver, NULL,
-				 NULL, qeth_procfile_seq_match);
-
-	/* get card at pos *offset */
-	nr = *offset;
-	while (nr-- > 1 && dev)
+	while (1) {
 		dev = driver_find_device(&qeth_ccwgroup_driver.driver, dev,
 					 NULL, qeth_procfile_seq_match);
-	return (void *) dev;
+		if (++nr == *offset)
+			break;
+		put_device(dev);
+	}
+	return dev;
 }
 
 static void
@@ -66,19 +62,14 @@ static void *
 qeth_procfile_seq_next(struct seq_file *s, void *it, loff_t *offset)
 {
 	struct device *prev, *next;
-
-	if (it == SEQ_START_TOKEN) {
-		next = driver_find_device(&qeth_ccwgroup_driver.driver,
-					  NULL, NULL, qeth_procfile_seq_match);
-		if (next)
-			(*offset)++;
-		return (void *) next;
-	}
-	prev = (struct device *) it;
+	
+	if (it == SEQ_START_TOKEN) 
+		prev = NULL;
+	else
+		prev = (struct device *) it;
 	next = driver_find_device(&qeth_ccwgroup_driver.driver,
 				  prev, NULL, qeth_procfile_seq_match);
-	if (next)
-		(*offset)++;
+	(*offset)++;
 	return (void *) next;
 }
 
@@ -87,7 +78,7 @@ qeth_get_router_str(struct qeth_card *card, int ipv)
 {
 	int routing_type = 0;
 
-	if (ipv == 4){
+	if (ipv == 4) {
 		routing_type = card->options.route4.type;
 	} else {
 #ifdef CONFIG_QETH_IPV6
@@ -154,6 +145,7 @@ qeth_procfile_seq_show(struct seq_file *s, void *it)
 					card->qdio.in_buf_pool.buf_count);
 		else
 			seq_printf(s, "  +++ LAN OFFLINE +++\n");
+		put_device(device);
 	}
 	return 0;
 }
@@ -184,51 +176,16 @@ static struct file_operations qeth_procfile_fops = {
 static struct proc_dir_entry *qeth_perf_procfile;
 
 #ifdef CONFIG_QETH_PERF_STATS
-
-static void *
-qeth_perf_procfile_seq_start(struct seq_file *s, loff_t *offset)
-{
-	struct device *dev = NULL;
-	int nr;
-
-	down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-	/* get card at pos *offset */
-	dev = driver_find_device(&qeth_ccwgroup_driver.driver, NULL, NULL,
-				 qeth_procfile_seq_match);
-
-	/* get card at pos *offset */
-	nr = *offset;
-	while (nr-- > 1 && dev)
-		dev = driver_find_device(&qeth_ccwgroup_driver.driver, dev,
-					 NULL, qeth_procfile_seq_match);
-	return (void *) dev;
-}
-
-static void
-qeth_perf_procfile_seq_stop(struct seq_file *s, void* it)
-{
-	up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-}
-
-static void *
-qeth_perf_procfile_seq_next(struct seq_file *s, void *it, loff_t *offset)
-{
-	struct device *prev, *next;
-
-	prev = (struct device *) it;
-	next = driver_find_device(&qeth_ccwgroup_driver.driver, prev,
-				  NULL, qeth_procfile_seq_match);
-	if (next)
-		(*offset)++;
-	return (void *) next;
-}
-
 static int
 qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
 {
 	struct device *device;
 	struct qeth_card *card;
 
+	
+	if (it == SEQ_START_TOKEN)
+		return 0;
+
 	device = (struct device *) it;
 	card = device->driver_data;
 	seq_printf(s, "For card with devnos %s/%s/%s (%s):\n",
@@ -295,13 +252,14 @@ qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
 		        card->perf_stats.outbound_do_qdio_time,
 			card->perf_stats.outbound_do_qdio_cnt
 		  );
+	put_device(device);
 	return 0;
 }
 
 static struct seq_operations qeth_perf_procfile_seq_ops = {
-	.start = qeth_perf_procfile_seq_start,
-	.stop  = qeth_perf_procfile_seq_stop,
-	.next  = qeth_perf_procfile_seq_next,
+	.start = qeth_procfile_seq_start,
+	.stop  = qeth_procfile_seq_stop,
+	.next  = qeth_procfile_seq_next,
 	.show  = qeth_perf_procfile_seq_show,
 };
 
@@ -324,93 +282,6 @@ static struct file_operations qeth_perf_procfile_fops = {
 #define qeth_perf_procfile_created 1
 #endif /* CONFIG_QETH_PERF_STATS */
 
-/***** /proc/qeth_ipa_takeover *****/
-#define QETH_IPATO_PROCFILE_NAME "qeth_ipa_takeover"
-static struct proc_dir_entry *qeth_ipato_procfile;
-
-static void *
-qeth_ipato_procfile_seq_start(struct seq_file *s, loff_t *offset)
-{
-	struct device *dev;
-	loff_t nr;
-
-	down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-	/* TODO: finish this */
-	/*
-	 * maybe SEQ_SATRT_TOKEN can be returned for offset 0
-	 * output driver settings then;
-	 * else output setting for respective card
-	 */
-
-	dev = driver_find_device(&qeth_ccwgroup_driver.driver, NULL, NULL,
-				 qeth_procfile_seq_match);
-
-	/* get card at pos *offset */
-	nr = *offset;
-	while (nr-- > 1 && dev)
-		dev = driver_find_device(&qeth_ccwgroup_driver.driver, dev,
-					 NULL, qeth_procfile_seq_match);
-	return (void *) dev;
-}
-
-static void
-qeth_ipato_procfile_seq_stop(struct seq_file *s, void* it)
-{
-	up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-}
-
-static void *
-qeth_ipato_procfile_seq_next(struct seq_file *s, void *it, loff_t *offset)
-{
-	struct device *prev, *next;
-
-	prev = (struct device *) it;
-	next = driver_find_device(&qeth_ccwgroup_driver.driver, prev,
-				  NULL, qeth_procfile_seq_match);
-	if (next)
-		(*offset)++;
-	return (void *) next;
-}
-
-static int
-qeth_ipato_procfile_seq_show(struct seq_file *s, void *it)
-{
-	struct device *device;
-	struct qeth_card *card;
-
-	/* TODO: finish this */
-	/*
-	 * maybe SEQ_SATRT_TOKEN can be returned for offset 0
-	 * output driver settings then;
-	 * else output setting for respective card
-	 */
-	device = (struct device *) it;
-	card = device->driver_data;
-
-	return 0;
-}
-
-static struct seq_operations qeth_ipato_procfile_seq_ops = {
-	.start = qeth_ipato_procfile_seq_start,
-	.stop  = qeth_ipato_procfile_seq_stop,
-	.next  = qeth_ipato_procfile_seq_next,
-	.show  = qeth_ipato_procfile_seq_show,
-};
-
-static int
-qeth_ipato_procfile_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &qeth_ipato_procfile_seq_ops);
-}
-
-static struct file_operations qeth_ipato_procfile_fops = {
-	.owner   = THIS_MODULE,
-	.open    = qeth_ipato_procfile_open,
-	.read    = seq_read,
-	.llseek  = seq_lseek,
-	.release = seq_release,
-};
-
 int __init
 qeth_create_procfs_entries(void)
 {
@@ -426,13 +297,7 @@ qeth_create_procfs_entries(void)
 		qeth_perf_procfile->proc_fops = &qeth_perf_procfile_fops;
 #endif /* CONFIG_QETH_PERF_STATS */
 
-	qeth_ipato_procfile = create_proc_entry(QETH_IPATO_PROCFILE_NAME,
-					   S_IFREG | 0444, NULL);
-	if (qeth_ipato_procfile)
-		qeth_ipato_procfile->proc_fops = &qeth_ipato_procfile_fops;
-
 	if (qeth_procfile &&
-	    qeth_ipato_procfile &&
 	    qeth_perf_procfile_created)
 		return 0;
 	else
@@ -446,62 +311,5 @@ qeth_remove_procfs_entries(void)
 		remove_proc_entry(QETH_PROCFILE_NAME, NULL);
 	if (qeth_perf_procfile)
 		remove_proc_entry(QETH_PERF_PROCFILE_NAME, NULL);
-	if (qeth_ipato_procfile)
-		remove_proc_entry(QETH_IPATO_PROCFILE_NAME, NULL);
 }
 
-
-/* ONLY FOR DEVELOPMENT! -> make it as module */
-/*
-static void
-qeth_create_sysfs_entries(void)
-{
-	struct device *dev;
-
-	down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-
-	list_for_each_entry(dev, &qeth_ccwgroup_driver.driver.devices,
-			driver_list)
-		qeth_create_device_attributes(dev);
-
-	up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-}
-
-static void
-qeth_remove_sysfs_entries(void)
-{
-	struct device *dev;
-
-	down_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-
-	list_for_each_entry(dev, &qeth_ccwgroup_driver.driver.devices,
-			driver_list)
-		qeth_remove_device_attributes(dev);
-
-	up_read(&qeth_ccwgroup_driver.driver.bus->subsys.rwsem);
-}
-
-static int __init
-qeth_fs_init(void)
-{
-	printk(KERN_INFO "qeth_fs_init\n");
-	qeth_create_procfs_entries();
-	qeth_create_sysfs_entries();
-
-	return 0;
-}
-
-static void __exit
-qeth_fs_exit(void)
-{
-	printk(KERN_INFO "qeth_fs_exit\n");
-	qeth_remove_procfs_entries();
-	qeth_remove_sysfs_entries();
-}
-
-
-module_init(qeth_fs_init);
-module_exit(qeth_fs_exit);
-
-MODULE_LICENSE("GPL");
-*/