[patch 1/2] ieee1394: nodemgr clean up class iterators

From: Stefan Richter
Date: Tue Aug 19 2008 - 15:29:54 EST

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Remove useless pointer type casts.
Remove unnecessary hi->host indirection where only host is used.
Remove an unnecessary WARN_ON.
Change a few names.

Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
---
drivers/ieee1394/nodemgr.c | 178 ++++++++++++++++---------------------
1 file changed, 81 insertions(+), 97 deletions(-)

Index: linux-2.6.27-rc3/drivers/ieee1394/nodemgr.c
===================================================================
--- linux-2.6.27-rc3.orig/drivers/ieee1394/nodemgr.c
+++ linux-2.6.27-rc3/drivers/ieee1394/nodemgr.c
@@ -154,7 +154,7 @@ struct host_info {

static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
-static void nodemgr_resume_ne(struct node_entry *ne);
+static void nodemgr_reactivate_ne(struct node_entry *ne);
static void nodemgr_remove_ne(struct node_entry *ne);
static struct node_entry *find_entry_by_guid(u64 guid);

@@ -734,10 +734,10 @@ static int nodemgr_bus_match(struct devi

static DEFINE_MUTEX(nodemgr_serialize_remove_uds);

-static int __match_ne(struct device *dev, void *data)
+static int match_ne(struct device *dev, void *data)
{
struct unit_directory *ud;
- struct node_entry *ne = (struct node_entry *)data;
+ struct node_entry *ne = data;

ud = container_of(dev, struct unit_directory, unit_dev);
return ud->ne == ne;
@@ -754,8 +754,7 @@ static void nodemgr_remove_uds(struct no
*/
mutex_lock(&nodemgr_serialize_remove_uds);
for (;;) {
- dev = class_find_device(&nodemgr_ud_class, NULL, ne,
- __match_ne);
+ dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
if (!dev)
break;
ud = container_of(dev, struct unit_directory, unit_dev);
@@ -785,7 +784,7 @@ static void nodemgr_remove_ne(struct nod
put_device(dev);
}

-static int __nodemgr_remove_host_dev(struct device *dev, void *data)
+static int remove_host_dev(struct device *dev, void *data)
{
if (dev->bus == &ieee1394_bus_type)
nodemgr_remove_ne(container_of(dev, struct node_entry,
@@ -795,7 +794,7 @@ static int __nodemgr_remove_host_dev(str

static void nodemgr_remove_host_dev(struct device *dev)
{
- WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
+ device_for_each_child(dev, NULL, remove_host_dev);
sysfs_remove_link(&dev->kobj, "irm_id");
sysfs_remove_link(&dev->kobj, "busmgr_id");
sysfs_remove_link(&dev->kobj, "host_id");
@@ -830,11 +829,10 @@ static void nodemgr_update_bus_options(s
}

-static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
- struct host_info *hi, nodeid_t nodeid,
- unsigned int generation)
+static struct node_entry *nodemgr_create_node(octlet_t guid,
+ struct csr1212_csr *csr, struct hpsb_host *host,
+ nodeid_t nodeid, unsigned int generation)
{
- struct hpsb_host *host = hi->host;
struct node_entry *ne;

ne = kzalloc(sizeof(*ne), GFP_KERNEL);
@@ -888,10 +886,10 @@ fail_alloc:
return NULL;
}

-static int __match_ne_guid(struct device *dev, void *data)
+static int match_ne_guid(struct device *dev, void *data)
{
struct node_entry *ne;
- u64 *guid = (u64 *)data;
+ u64 *guid = data;

ne = container_of(dev, struct node_entry, node_dev);
return ne->guid == *guid;
@@ -902,8 +900,7 @@ static struct node_entry *find_entry_by_
struct device *dev;
struct node_entry *ne;

- dev = class_find_device(&nodemgr_ne_class, NULL, &guid,
- __match_ne_guid);
+ dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
if (!dev)
return NULL;
ne = container_of(dev, struct node_entry, node_dev);
@@ -912,21 +909,21 @@ static struct node_entry *find_entry_by_
return ne;
}

-struct match_nodeid_param {
+struct match_nodeid_parameter {
struct hpsb_host *host;
nodeid_t nodeid;
};

-static int __match_ne_nodeid(struct device *dev, void *data)
+static int match_ne_nodeid(struct device *dev, void *data)
{
int found = 0;
struct node_entry *ne;
- struct match_nodeid_param *param = (struct match_nodeid_param *)data;
+ struct match_nodeid_parameter *p = data;

if (!dev)
goto ret;
ne = container_of(dev, struct node_entry, node_dev);
- if (ne->host == param->host && ne->nodeid == param->nodeid)
+ if (ne->host == p->host && ne->nodeid == p->nodeid)
found = 1;
ret:
return found;
@@ -937,13 +934,12 @@ static struct node_entry *find_entry_by_
{
struct device *dev;
struct node_entry *ne;
- struct match_nodeid_param param;
+ struct match_nodeid_parameter p;

- param.host = host;
- param.nodeid = nodeid;
+ p.host = host;
+ p.nodeid = nodeid;

- dev = class_find_device(&nodemgr_ne_class, NULL, &param,
- __match_ne_nodeid);
+ dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
if (!dev)
return NULL;
ne = container_of(dev, struct node_entry, node_dev);
@@ -990,7 +986,7 @@ fail_devreg:
* immediate unit directories looking for software_id and
* software_version entries, in order to get driver autoloading working. */
static struct unit_directory *nodemgr_process_unit_directory
- (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
+ (struct node_entry *ne, struct csr1212_keyval *ud_kv,
unsigned int *id, struct unit_directory *parent)
{
struct unit_directory *ud;
@@ -1083,7 +1079,7 @@ static struct unit_directory *nodemgr_pr
nodemgr_register_device(ne, ud, &ne->device);

/* process the child unit */
- ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
+ ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);

if (ud_child == NULL)
break;
@@ -1137,7 +1133,7 @@ unit_directory_error:
}

-static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
+static void nodemgr_process_root_directory(struct node_entry *ne)
{
unsigned int ud_id = 0;
struct csr1212_dentry *dentry;
@@ -1157,7 +1153,7 @@ static void nodemgr_process_root_directo
break;

case CSR1212_KV_ID_UNIT:
- nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
+ nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
break;

case CSR1212_KV_ID_DESCRIPTOR:
@@ -1273,8 +1269,7 @@ void hpsb_unregister_protocol(struct hps
* the to take whatever actions required.
*/
static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
- struct host_info *hi, nodeid_t nodeid,
- unsigned int generation)
+ nodeid_t nodeid, unsigned int generation)
{
if (ne->nodeid != nodeid) {
HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
@@ -1306,7 +1301,7 @@ static void nodemgr_update_node(struct n
}

if (ne->in_limbo)
- nodemgr_resume_ne(ne);
+ nodemgr_reactivate_ne(ne);

/* Mark the node current */
ne->generation = generation;
@@ -1314,10 +1309,9 @@ static void nodemgr_update_node(struct n

-static void nodemgr_node_scan_one(struct host_info *hi,
+static void nodemgr_node_scan_one(struct hpsb_host *host,
nodeid_t nodeid, int generation)
{
- struct hpsb_host *host = hi->host;
struct node_entry *ne;
octlet_t guid;
struct csr1212_csr *csr;
@@ -1373,16 +1367,15 @@ static void nodemgr_node_scan_one(struct
}

if (!ne)
- nodemgr_create_node(guid, csr, hi, nodeid, generation);
+ nodemgr_create_node(guid, csr, host, nodeid, generation);
else
- nodemgr_update_node(ne, csr, hi, nodeid, generation);
+ nodemgr_update_node(ne, csr, nodeid, generation);
}

-static void nodemgr_node_scan(struct host_info *hi, int generation)
+static void nodemgr_node_scan(struct hpsb_host *host, int generation)
{
int count;
- struct hpsb_host *host = hi->host;
struct selfid *sid = (struct selfid *)host->topology_map;
nodeid_t nodeid = LOCAL_BUS;

@@ -1395,15 +1388,15 @@ static void nodemgr_node_scan(struct hos
nodeid++;
continue;
}
- nodemgr_node_scan_one(hi, nodeid++, generation);
+ nodemgr_node_scan_one(host, nodeid++, generation);
}
}

-static int __nodemgr_driver_suspend(struct device *dev, void *data)
+static int pause_ne(struct device *dev, void *data)
{
struct unit_directory *ud;
struct device_driver *drv;
- struct node_entry *ne = (struct node_entry *)data;
+ struct node_entry *ne = data;
int error;

ud = container_of(dev, struct unit_directory, unit_dev);
@@ -1425,11 +1418,23 @@ static int __nodemgr_driver_suspend(stru
return 0;
}

-static int __nodemgr_driver_resume(struct device *dev, void *data)
+static void nodemgr_pause_ne(struct node_entry *ne)
+{
+ HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
+ NODE_BUS_ARGS(ne->host, ne->nodeid),
+ (unsigned long long)ne->guid);
+
+ ne->in_limbo = 1;
+ WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
+
+ class_for_each_device(&nodemgr_ud_class, NULL, ne, pause_ne);
+}
+
+static int reactivate_ne(struct device *dev, void *data)
{
struct unit_directory *ud;
struct device_driver *drv;
- struct node_entry *ne = (struct node_entry *)data;
+ struct node_entry *ne = data;

ud = container_of(dev, struct unit_directory, unit_dev);
if (ud->ne == ne) {
@@ -1447,37 +1452,23 @@ static int __nodemgr_driver_resume(struc
return 0;
}

-static void nodemgr_suspend_ne(struct node_entry *ne)
-{
- HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid),
- (unsigned long long)ne->guid);
-
- ne->in_limbo = 1;
- WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
-
- class_for_each_device(&nodemgr_ud_class, NULL, ne,
- __nodemgr_driver_suspend);
-}
-
-
-static void nodemgr_resume_ne(struct node_entry *ne)
+static void nodemgr_reactivate_ne(struct node_entry *ne)
{
ne->in_limbo = 0;
device_remove_file(&ne->device, &dev_attr_ne_in_limbo);

- class_for_each_device(&nodemgr_ud_class, NULL, ne,
- __nodemgr_driver_resume);
+ class_for_each_device(&nodemgr_ud_class, NULL, ne, reactivate_ne);
HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
+ NODE_BUS_ARGS(ne->host, ne->nodeid),
+ (unsigned long long)ne->guid);
}

-static int __nodemgr_update_pdrv(struct device *dev, void *data)
+static int update_pdrv(struct device *dev, void *data)
{
struct unit_directory *ud;
struct device_driver *drv;
struct hpsb_protocol_driver *pdrv;
- struct node_entry *ne = (struct node_entry *)data;
+ struct node_entry *ne = data;
int error;

ud = container_of(dev, struct unit_directory, unit_dev);
@@ -1503,8 +1494,7 @@ static int __nodemgr_update_pdrv(struct

static void nodemgr_update_pdrv(struct node_entry *ne)
{
- class_for_each_device(&nodemgr_ud_class, NULL, ne,
- __nodemgr_update_pdrv);
+ class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
}

@@ -1535,11 +1525,12 @@ static void nodemgr_irm_write_bc(struct
}

-static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
+static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
+ int generation)
{
struct device *dev;

- if (ne->host != hi->host || ne->in_limbo)
+ if (ne->host != host || ne->in_limbo)
return;

dev = get_device(&ne->device);
@@ -1554,40 +1545,40 @@ static void nodemgr_probe_ne(struct host
* down to the drivers. Otherwise, this is a dead node and we
* suspend it. */
if (ne->needs_probe)
- nodemgr_process_root_directory(hi, ne);
+ nodemgr_process_root_directory(ne);
else if (ne->generation == generation)
nodemgr_update_pdrv(ne);
else
- nodemgr_suspend_ne(ne);
+ nodemgr_pause_ne(ne);

put_device(dev);
}

-struct probe_param {
- struct host_info *hi;
+struct node_probe_parameter {
+ struct hpsb_host *host;
int generation;
bool probe_now;
};

static int node_probe(struct device *dev, void *data)
{
- struct probe_param *p = data;
+ struct node_probe_parameter *p = data;
struct node_entry *ne;

- if (p->generation != get_hpsb_generation(p->hi->host))
+ if (p->generation != get_hpsb_generation(p->host))
return -EAGAIN;

ne = container_of(dev, struct node_entry, node_dev);
if (ne->needs_probe == p->probe_now)
- nodemgr_probe_ne(p->hi, ne, p->generation);
+ nodemgr_probe_ne(p->host, ne, p->generation);
return 0;
}

-static void nodemgr_node_probe(struct host_info *hi, int generation)
+static void nodemgr_node_probe(struct hpsb_host *host, int generation)
{
- struct probe_param p;
+ struct node_probe_parameter p;

- p.hi = hi;
+ p.host = host;
p.generation = generation;
/*
* Do some processing of the nodes we've probed. This pulls them
@@ -1730,10 +1721,9 @@ static int nodemgr_check_irm_capability(
return 1;
}

-static int nodemgr_host_thread(void *__hi)
+static int nodemgr_host_thread(void *data)
{
- struct host_info *hi = (struct host_info *)__hi;
- struct hpsb_host *host = hi->host;
+ struct hpsb_host *host = data;
unsigned int g, generation = 0;
int i, reset_cycles = 0;

@@ -1787,11 +1777,11 @@ static int nodemgr_host_thread(void *__h
* entries. This does not do the sysfs stuff, since that
* would trigger uevents and such, which is a bad idea at
* this point. */
- nodemgr_node_scan(hi, generation);
+ nodemgr_node_scan(host, generation);

/* This actually does the full probe, with sysfs
* registration. */
- nodemgr_node_probe(hi, generation);
+ nodemgr_node_probe(host, generation);

/* Update some of our sysfs symlinks */
nodemgr_update_host_dev_links(host);
@@ -1801,22 +1791,20 @@ exit:
return 0;
}

-struct host_iter_param {
+struct per_host_parameter {
void *data;
int (*cb)(struct hpsb_host *, void *);
};

-static int __nodemgr_for_each_host(struct device *dev, void *data)
+static int per_host(struct device *dev, void *data)
{
struct hpsb_host *host;
- struct host_iter_param *hip = (struct host_iter_param *)data;
- int error = 0;
+ struct per_host_parameter *p = data;

host = container_of(dev, struct hpsb_host, host_dev);
- error = hip->cb(host, hip->data);
-
- return error;
+ return p->cb(host, p->data);
}
+
/**
* nodemgr_for_each_host - call a function for each IEEE 1394 host
* @data: an address to supply to the callback
@@ -1831,15 +1819,11 @@ static int __nodemgr_for_each_host(struc
*/
int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
{
- struct host_iter_param hip;
- int error;
+ struct per_host_parameter p;

- hip.cb = cb;
- hip.data = data;
- error = class_for_each_device(&hpsb_host_class, NULL, &hip,
- __nodemgr_for_each_host);
-
- return error;
+ p.cb = cb;
+ p.data = data;
+ return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
}

/* The following two convenience functions use a struct node_entry
@@ -1893,7 +1877,7 @@ static void nodemgr_add_host(struct hpsb
return;
}
hi->host = host;
- hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
+ hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
host->id);
if (IS_ERR(hi->thread)) {
HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);

--
Stefan Richter
-=====-==--- =--- =--==
http://arcgraph.de/sr/

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Next message: Stefan Richter: "[patch 2/2] ieee1394: survive a few seconds connection loss"
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