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Commit 73cf6023 authored by Dave Young's avatar Dave Young Committed by Greg Kroah-Hartman
Browse files

ieee1394: use class iteration api 



Convert to use the class iteration api.

Signed-off-by: default avatarDave Young <hidave.darkstar@gmail.com>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent fd04897b

drivers/ieee1394/nodemgr.c

+176 −138
Original line number Diff line number Diff line
@@ -727,33 +727,31 @@ static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) 


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);

	return ud->ne == ne;

}



static void nodemgr_remove_uds(struct node_entry *ne)

{

	struct device *dev;

	struct unit_directory *tmp, *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.

	struct unit_directory *ud;



	/* 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)

		dev = class_find_device(&nodemgr_ud_class, ne, __match_ne);

		if (!dev)

			break;

		ud = container_of(dev, struct unit_directory, unit_dev);

		put_device(dev);

		device_unregister(&ud->unit_dev);

		device_unregister(&ud->device);

	}
@@ -882,45 +880,66 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr 
	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);

	return ne->guid == *guid;

}



static struct node_entry *find_entry_by_guid(u64 guid)

{

	struct device *dev;

	struct node_entry *ne, *ret_ne = NULL;

	struct node_entry *ne;



	down(&nodemgr_ne_class.sem);

	list_for_each_entry(dev, &nodemgr_ne_class.devices, node) {

	dev = class_find_device(&nodemgr_ne_class, &guid, __match_ne_guid);

	if (!dev)

		return NULL;

	ne = container_of(dev, struct node_entry, node_dev);

	put_device(dev);



		if (ne->guid == guid) {

			ret_ne = ne;

			break;

		}

	return ne;

}

	up(&nodemgr_ne_class.sem);



	return ret_ne;

}

struct match_nodeid_param {

	struct hpsb_host *host;

	nodeid_t nodeid;

};



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;



	if (!dev)

		goto ret;

	ne = container_of(dev, struct node_entry, node_dev);

	if (ne->host == param->host && ne->nodeid == param->nodeid)

		found = 1;

ret:

	return found;

}



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, &param, __match_ne_nodeid);

	if (!dev)

		return NULL;

	ne = container_of(dev, struct node_entry, node_dev);

	put_device(dev);



	return ret_ne;

	return ne;

}
@@ -1370,30 +1389,17 @@ static void nodemgr_node_scan(struct host_info *hi, int generation) 
	}

}





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);



	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;



	if (ud->ne == ne) {

		drv = get_driver(ud->device.driver);

		if (!drv)

			continue;



		if (drv) {

			error = 1; /* release if suspend is not implemented */

			if (drv->suspend) {

				down(&ud->device.sem);
@@ -1404,29 +1410,21 @@ static void nodemgr_suspend_ne(struct node_entry *ne) 
				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 int __nodemgr_driver_resume(struct device *dev, void *data)

{

	struct device *dev;

	struct unit_directory *ud;

	struct device_driver *drv;

	struct node_entry *ne = (struct node_entry *)data;



	ne->in_limbo = 0;

	device_remove_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;



	if (ud->ne == ne) {

		drv = get_driver(ud->device.driver);

		if (!drv)

			continue;



		if (drv) {

			if (drv->resume) {

				down(&ud->device.sem);

				drv->resume(&ud->device);
@@ -1434,33 +1432,49 @@ static void nodemgr_resume_ne(struct node_entry *ne) 
			}

			put_driver(drv);

		}

	up(&nodemgr_ud_class.sem);

	}



	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, ne, __nodemgr_driver_suspend);

}





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;



	if (ud->ne == ne) {

		drv = get_driver(ud->device.driver);

		if (!drv)

			continue;



		if (drv) {

			error = 0;

		pdrv = container_of(drv, struct hpsb_protocol_driver, driver);

			pdrv = container_of(drv, struct hpsb_protocol_driver,

					    driver);

			if (pdrv->update) {

				down(&ud->device.sem);

				error = pdrv->update(ud);
@@ -1470,7 +1484,14 @@ static void nodemgr_update_pdrv(struct node_entry *ne) 
				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 +1550,31 @@ static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int ge 
	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 +1584,7 @@ static void nodemgr_node_probe(struct host_info *hi, int generation) 
	 * 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, &param, __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 +1784,22 @@ static int nodemgr_host_thread(void *__hi) 
	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 +1814,13 @@ static int nodemgr_host_thread(void *__hi) 
 */

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;

}