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Date: Sat, 12 Jan 2008 17:50:08 +0800
From: Dave Young <hidave.darkstar@...il.com>
To: krh@...hat.com, stefanr@...6.in-berlin.de
Cc: gregkh@...e.de, linux1394-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] ieee1394 : use class iteration api
Convert to use the class iteration api.
Signed-off-by: Dave Young <hidave.darkstar@...il.com>
---
drivers/ieee1394/nodemgr.c | 319 +++++++++++++++++++++++++--------------------
1 file changed, 178 insertions(+), 141 deletions(-)
diff -upr linux/drivers/ieee1394/nodemgr.c linux.new/drivers/ieee1394/nodemgr.c
--- linux/drivers/ieee1394/nodemgr.c 2008-01-12 15:20:27.000000000 +0800
+++ linux.new/drivers/ieee1394/nodemgr.c 2008-01-12 15:20:27.000000000 +0800
@@ -727,36 +727,35 @@ static int nodemgr_bus_match(struct devi
static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
+static int __match_ne(struct device *dev, void *data)
+{
+ struct unit_directory *ud;
+ struct node_entry *ne = (struct node_entry *)data;
+
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ if (ud->ne == ne)
+ return 1;
+ return 0;
+}
+
static void nodemgr_remove_uds(struct node_entry *ne)
{
struct device *dev;
- struct unit_directory *tmp, *ud;
+ struct unit_directory *ud;
- /* Iteration over nodemgr_ud_class.devices has to be protected by
- * nodemgr_ud_class.sem, but device_unregister() will eventually
- * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
- * release the semaphore, and then unregister the ud. Since this code
- * may be called from other contexts besides the knodemgrds, protect the
- * gap after release of the semaphore by nodemgr_serialize_remove_uds.
+ /* Use class_find device to iterate the devices. Since this code
+ * may be called from other contexts besides the knodemgrds,
+ * protect it by nodemgr_serialize_remove_uds.
*/
mutex_lock(&nodemgr_serialize_remove_uds);
- for (;;) {
- ud = NULL;
- down(&nodemgr_ud_class.sem);
- list_for_each_entry(dev, &nodemgr_ud_class.devices, node) {
- tmp = container_of(dev, struct unit_directory,
- unit_dev);
- if (tmp->ne == ne) {
- ud = tmp;
- break;
- }
- }
- up(&nodemgr_ud_class.sem);
- if (ud == NULL)
- break;
- device_unregister(&ud->unit_dev);
- device_unregister(&ud->device);
+ dev = class_find_device(&nodemgr_ud_class, ne, __match_ne);
+ if (!dev) {
+ mutex_unlock(&nodemgr_serialize_remove_uds);
+ return;
}
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ device_unregister(&ud->unit_dev);
+ device_unregister(&ud->device);
mutex_unlock(&nodemgr_serialize_remove_uds);
}
@@ -882,45 +881,64 @@ fail_alloc:
return NULL;
}
+static int __match_ne_guid(struct device *dev, void *data)
+{
+ struct node_entry *ne;
+ u64 *guid = (u64 *)data;
+
+ ne = container_of(dev, struct node_entry, node_dev);
+ if (ne->guid == *guid)
+ return 1;
+ return 0;
+}
static struct node_entry *find_entry_by_guid(u64 guid)
{
struct device *dev;
- struct node_entry *ne, *ret_ne = NULL;
-
- down(&nodemgr_ne_class.sem);
- list_for_each_entry(dev, &nodemgr_ne_class.devices, node) {
- ne = container_of(dev, struct node_entry, node_dev);
+ struct node_entry *ne;
- if (ne->guid == guid) {
- ret_ne = ne;
- break;
- }
- }
- up(&nodemgr_ne_class.sem);
+ dev = class_find_device(&nodemgr_ne_class, &guid, __match_ne_guid);
+ if (!dev)
+ return NULL;
+ ne = container_of(dev, struct node_entry, node_dev);
- return ret_ne;
+ return ne;
}
+struct match_nodeid_param {
+ struct hpsb_host *host;
+ nodeid_t nodeid;
+};
+
+static int __match_ne_nodeid(struct device *dev, void *data)
+{
+ struct node_entry *ne;
+ struct match_nodeid_param *param = (struct match_nodeid_param *)data;
+
+ if (!dev)
+ return 0;
+ ne = container_of(dev, struct node_entry, node_dev);
+ if (ne->host == param->host && ne->nodeid == param->nodeid)
+ return 1;
+ return 0;
+}
static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
nodeid_t nodeid)
{
struct device *dev;
- struct node_entry *ne, *ret_ne = NULL;
+ struct node_entry *ne;
+ struct match_nodeid_param param;
- down(&nodemgr_ne_class.sem);
- list_for_each_entry(dev, &nodemgr_ne_class.devices, node) {
- ne = container_of(dev, struct node_entry, node_dev);
+ param.host = host;
+ param.nodeid = nodeid;
- if (ne->host == host && ne->nodeid == nodeid) {
- ret_ne = ne;
- break;
- }
- }
- up(&nodemgr_ne_class.sem);
+ dev = class_find_device(&nodemgr_ne_class, ¶m, __match_ne_nodeid);
+ if (!dev)
+ return NULL;
+ ne = container_of(dev, struct node_entry, node_dev);
- return ret_ne;
+ return ne;
}
@@ -1370,107 +1388,109 @@ static void nodemgr_node_scan(struct hos
}
}
-
-static void nodemgr_suspend_ne(struct node_entry *ne)
+static int __nodemgr_driver_suspend(struct device *dev, void *data)
{
- struct device *dev;
struct unit_directory *ud;
struct device_driver *drv;
+ struct node_entry *ne = (struct node_entry *)data;
int error;
- HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ if (ud->ne == ne) {
+ drv = get_driver(ud->device.driver);
+ if (drv) {
+ error = 1; /* release if suspend is not implemented */
+ if (drv->suspend) {
+ down(&ud->device.sem);
+ error = drv->suspend(&ud->device, PMSG_SUSPEND);
+ up(&ud->device.sem);
+ }
+ if (error)
+ device_release_driver(&ud->device);
+ put_driver(drv);
+ }
+ }
- ne->in_limbo = 1;
- WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
+ return 0;
+}
- down(&nodemgr_ud_class.sem);
- list_for_each_entry(dev, &nodemgr_ud_class.devices, node) {
- ud = container_of(dev, struct unit_directory, unit_dev);
- if (ud->ne != ne)
- continue;
+static int __nodemgr_driver_resume(struct device *dev, void *data)
+{
+ struct unit_directory *ud;
+ struct device_driver *drv;
+ struct node_entry *ne = (struct node_entry *)data;
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ if (ud->ne == ne) {
drv = get_driver(ud->device.driver);
- if (!drv)
- continue;
-
- error = 1; /* release if suspend is not implemented */
- if (drv->suspend) {
- down(&ud->device.sem);
- error = drv->suspend(&ud->device, PMSG_SUSPEND);
- up(&ud->device.sem);
+ if (drv) {
+ if (drv->resume) {
+ down(&ud->device.sem);
+ drv->resume(&ud->device);
+ up(&ud->device.sem);
+ }
+ put_driver(drv);
}
- if (error)
- device_release_driver(&ud->device);
- put_driver(drv);
}
- up(&nodemgr_ud_class.sem);
-}
+ return 0;
+}
-static void nodemgr_resume_ne(struct node_entry *ne)
+static void nodemgr_suspend_ne(struct node_entry *ne)
{
- struct device *dev;
- struct unit_directory *ud;
- struct device_driver *drv;
+ 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 = 0;
- device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
+ ne->in_limbo = 1;
+ WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
- down(&nodemgr_ud_class.sem);
- list_for_each_entry(dev, &nodemgr_ud_class.devices, node) {
- ud = container_of(dev, struct unit_directory, unit_dev);
- if (ud->ne != ne)
- continue;
+ class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_driver_suspend);
+}
- drv = get_driver(ud->device.driver);
- if (!drv)
- continue;
- if (drv->resume) {
- down(&ud->device.sem);
- drv->resume(&ud->device);
- up(&ud->device.sem);
- }
- put_driver(drv);
- }
- up(&nodemgr_ud_class.sem);
+static void nodemgr_resume_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, ne, __nodemgr_driver_resume);
HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
}
-
-static void nodemgr_update_pdrv(struct node_entry *ne)
+static int __nodemgr_update_pdrv(struct device *dev, void *data)
{
- struct device *dev;
struct unit_directory *ud;
struct device_driver *drv;
struct hpsb_protocol_driver *pdrv;
+ struct node_entry *ne = (struct node_entry *)data;
int error;
- down(&nodemgr_ud_class.sem);
- list_for_each_entry(dev, &nodemgr_ud_class.devices, node) {
- ud = container_of(dev, struct unit_directory, unit_dev);
- if (ud->ne != ne)
- continue;
-
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ if (ud->ne == ne) {
drv = get_driver(ud->device.driver);
- if (!drv)
- continue;
-
- error = 0;
- pdrv = container_of(drv, struct hpsb_protocol_driver, driver);
- if (pdrv->update) {
- down(&ud->device.sem);
- error = pdrv->update(ud);
- up(&ud->device.sem);
+ if (drv) {
+ error = 0;
+ pdrv = container_of(drv, struct hpsb_protocol_driver,
+ driver);
+ if (pdrv->update) {
+ down(&ud->device.sem);
+ error = pdrv->update(ud);
+ up(&ud->device.sem);
+ }
+ if (error)
+ device_release_driver(&ud->device);
+ put_driver(drv);
}
- if (error)
- device_release_driver(&ud->device);
- put_driver(drv);
}
- up(&nodemgr_ud_class.sem);
+
+ return 0;
+}
+
+static void nodemgr_update_pdrv(struct node_entry *ne)
+{
+ class_for_each_device(&nodemgr_ud_class, ne, __nodemgr_update_pdrv);
}
@@ -1529,13 +1549,31 @@ static void nodemgr_probe_ne(struct host
put_device(dev);
}
+struct probe_param {
+ struct host_info *hi;
+ int generation;
+};
+
+static int __nodemgr_node_probe(struct device *dev, void *data)
+{
+ struct probe_param *param = (struct probe_param *)data;
+ struct node_entry *ne;
+
+ ne = container_of(dev, struct node_entry, node_dev);
+ if (!ne->needs_probe)
+ nodemgr_probe_ne(param->hi, ne, param->generation);
+ if (ne->needs_probe)
+ nodemgr_probe_ne(param->hi, ne, param->generation);
+ return 0;
+}
static void nodemgr_node_probe(struct host_info *hi, int generation)
{
struct hpsb_host *host = hi->host;
- struct device *dev;
- struct node_entry *ne;
+ struct probe_param param;
+ param.hi = hi;
+ param.generation = generation;
/* Do some processing of the nodes we've probed. This pulls them
* into the sysfs layer if needed, and can result in processing of
* unit-directories, or just updating the node and it's
@@ -1545,19 +1583,7 @@ static void nodemgr_node_probe(struct ho
* while probes are time-consuming. (Well, those probes need some
* improvement...) */
- down(&nodemgr_ne_class.sem);
- list_for_each_entry(dev, &nodemgr_ne_class.devices, node) {
- ne = container_of(dev, struct node_entry, node_dev);
- if (!ne->needs_probe)
- nodemgr_probe_ne(hi, ne, generation);
- }
- list_for_each_entry(dev, &nodemgr_ne_class.devices, node) {
- ne = container_of(dev, struct node_entry, node_dev);
- if (ne->needs_probe)
- nodemgr_probe_ne(hi, ne, generation);
- }
- up(&nodemgr_ne_class.sem);
-
+ class_for_each_device(&nodemgr_ne_class, ¶m, __nodemgr_node_probe);
/* If we had a bus reset while we were scanning the bus, it is
* possible that we did not probe all nodes. In that case, we
@@ -1757,6 +1783,22 @@ exit:
return 0;
}
+struct host_iter_param {
+ void *data;
+ int (*cb)(struct hpsb_host *, void *);
+};
+
+static int __nodemgr_for_each_host(struct device *dev, void *data)
+{
+ struct hpsb_host *host;
+ struct host_iter_param *hip = (struct host_iter_param *)data;
+ int error = 0;
+
+ host = container_of(dev, struct hpsb_host, host_dev);
+ error = hip->cb(host, hip->data);
+
+ return error;
+}
/**
* nodemgr_for_each_host - call a function for each IEEE 1394 host
* @data: an address to supply to the callback
@@ -1771,18 +1813,13 @@ exit:
*/
int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
{
- struct device *dev;
- struct hpsb_host *host;
- int error = 0;
-
- down(&hpsb_host_class.sem);
- list_for_each_entry(dev, &hpsb_host_class.devices, node) {
- host = container_of(dev, struct hpsb_host, host_dev);
+ struct host_iter_param hip;
+ int error;
- if ((error = cb(host, data)))
- break;
- }
- up(&hpsb_host_class.sem);
+ hip.cb = cb;
+ hip.data = data;
+ error = class_for_each_device(&hpsb_host_class, &hip,
+ __nodemgr_for_each_host);
return error;
}
--
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