[PATCH 1/2] I2O: remove i2o_device_class_interface

Dmitry Torokhov
2005-09-13T04:35:06Z

I2O: remove i2o_device_class_interface misuse

The intent of class interfaces was to provide different
'views' at the same object, not just run some code every
time a new class device is registered. Kill interface
structure, make class core register default attributes
and set up sysfs links right when registering class
devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

drivers/message/i2o/device.c | 255 ++++++++++++++++++++-----------------------
1 files changed, 122 insertions(+), 133 deletions(-)

Index: work/drivers/message/i2o/device.c
===================================================================
--- work.orig/drivers/message/i2o/device.c
+++ work/drivers/message/i2o/device.c
@@ -45,10 +45,10 @@ static inline int i2o_device_issue_claim
writel(type, &msg->body[0]);

return i2o_msg_post_wait(dev->iop, m, 60);
-};
+}

/**
- * i2o_device_claim - claim a device for use by an OSM
+ * i2o_device_claim - claim a device for use by an OSM
* @dev: I2O device to claim
* @drv: I2O driver which wants to claim the device
*
@@ -73,7 +73,7 @@ int i2o_device_claim(struct i2o_device *
up(&dev->lock);

return rc;
-};
+}

/**
* i2o_device_claim_release - release a device that the OSM is using
@@ -119,7 +119,8 @@ int i2o_device_claim_release(struct i2o_
up(&dev->lock);

return rc;
-};
+}
+

/**
* i2o_device_release - release the memory for a I2O device
@@ -135,39 +136,62 @@ static void i2o_device_release(struct de
pr_debug("i2o: device %s released\n", dev->bus_id);

kfree(i2o_dev);
-};
+}

/**
- * i2o_device_class_release - Remove I2O device attributes
+ * i2o_device_class_release - I2O class device release function
* @cd: I2O class device which is added to the I2O device class
*
- * Removes attributes from the I2O device again. Also search each device
- * on the controller for I2O devices which refert to this device as parent
- * or user and remove this links also.
+ * The function is just a stub - memory will be freed when
+ * associated I2O device is released.
*/
static void i2o_device_class_release(struct class_device *cd)
{
- struct i2o_device *i2o_dev, *tmp;
- struct i2o_controller *c;
+ /* empty */
+}

- i2o_dev = to_i2o_device(cd->dev);
- c = i2o_dev->iop;
+/**
+ * i2o_device_class_show_class_id - Displays class id of I2O device
+ * @cd: class device of which the class id should be displayed
+ * @buf: buffer into which the class id should be printed
+ *
+ * Returns the number of bytes which are printed into the buffer.
+ */
+static ssize_t i2o_device_class_show_class_id(struct class_device *cd,
+ char *buf)
+{
+ struct i2o_device *dev = to_i2o_device(cd->dev);

- sysfs_remove_link(&i2o_dev->device.kobj, "parent");
- sysfs_remove_link(&i2o_dev->device.kobj, "user");
+ sprintf(buf, "0x%03x\n", dev->lct_data.class_id);
+ return strlen(buf) + 1;
+}

- list_for_each_entry(tmp, &c->devices, list) {
- if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
- sysfs_remove_link(&tmp->device.kobj, "parent");
- if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
- sysfs_remove_link(&tmp->device.kobj, "user");
- }
+/**
+ * i2o_device_class_show_tid - Displays TID of I2O device
+ * @cd: class device of which the TID should be displayed
+ * @buf: buffer into which the class id should be printed
+ *
+ * Returns the number of bytes which are printed into the buffer.
+ */
+static ssize_t i2o_device_class_show_tid(struct class_device *cd, char *buf)
+{
+ struct i2o_device *dev = to_i2o_device(cd->dev);
+
+ sprintf(buf, "0x%03x\n", dev->lct_data.tid);
+ return strlen(buf) + 1;
+}
+
+static struct class_device_attribute i2o_device_class_attrs[] = {
+ __ATTR(class_id, S_IRUGO, i2o_device_class_show_class_id, NULL),
+ __ATTR(tid, S_IRUGO, i2o_device_class_show_tid, NULL),
+ __ATTR_NULL
};

/* I2O device class */
static struct class i2o_device_class = {
- .name = "i2o_device",
- .release = i2o_device_class_release
+ .name = "i2o_device",
+ .release = i2o_device_class_release,
+ .class_dev_attrs = i2o_device_class_attrs,
};

/**
@@ -197,7 +221,67 @@ static struct i2o_device *i2o_device_all
dev->classdev.dev = &dev->device;

return dev;
-};
+}
+
+/**
+ * i2o_setup_sysfs_links - Adds attributes to the I2O device
+ * @cd: I2O class device which is added to the I2O device class
+ *
+ * This function get called when a I2O device is added to the class. It
+ * creates the attributes for each device and creates user/parent symlink
+ * if necessary.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+static void i2o_setup_sysfs_links(struct i2o_device *i2o_dev)
+{
+ struct i2o_controller *c = i2o_dev->iop;
+ struct i2o_device *tmp;
+
+ /* create user entries for this device */
+ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid);
+ if (tmp && tmp != i2o_dev)
+ sysfs_create_link(&i2o_dev->device.kobj,
+ &tmp->device.kobj, "user");
+
+ /* create user entries refering to this device */
+ list_for_each_entry(tmp, &c->devices, list)
+ if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid &&
+ tmp != i2o_dev)
+ sysfs_create_link(&tmp->device.kobj,
+ &i2o_dev->device.kobj, "user");
+
+ /* create parent entries for this device */
+ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid);
+ if (tmp && tmp != i2o_dev)
+ sysfs_create_link(&i2o_dev->device.kobj,
+ &tmp->device.kobj, "parent");
+
+ /* create parent entries refering to this device */
+ list_for_each_entry(tmp, &c->devices, list)
+ if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid &&
+ tmp != i2o_dev)
+ sysfs_create_link(&tmp->device.kobj,
+ &i2o_dev->device.kobj, "parent");
+}
+
+static void i2o_remove_sysfs_links(struct i2o_device *i2o_dev)
+{
+ struct i2o_controller *c = i2o_dev->iop;
+ struct i2o_device *tmp;
+
+ sysfs_remove_link(&i2o_dev->device.kobj, "parent");
+ sysfs_remove_link(&i2o_dev->device.kobj, "user");
+
+ list_for_each_entry(tmp, &c->devices, list) {
+ if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
+ sysfs_remove_link(&tmp->device.kobj, "parent");
+ if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
+ sysfs_remove_link(&tmp->device.kobj, "user");
+ }
+}
+
+

/**
* i2o_device_add - allocate a new I2O device and add it to the IOP
@@ -222,6 +306,7 @@ static struct i2o_device *i2o_device_add
}

dev->lct_data = *entry;
+ dev->iop = c;

snprintf(dev->device.bus_id, BUS_ID_SIZE, "%d:%03x", c->unit,
dev->lct_data.tid);
@@ -229,7 +314,6 @@ static struct i2o_device *i2o_device_add
snprintf(dev->classdev.class_id, BUS_ID_SIZE, "%d:%03x", c->unit,
dev->lct_data.tid);

- dev->iop = c;
dev->device.parent = &c->device;

device_register(&dev->device);
@@ -238,12 +322,14 @@ static struct i2o_device *i2o_device_add

class_device_register(&dev->classdev);

+ i2o_setup_sysfs_links(dev);
+
i2o_driver_notify_device_add_all(dev);

pr_debug("i2o: device %s added\n", dev->device.bus_id);

return dev;
-};
+}

/**
* i2o_device_remove - remove an I2O device from the I2O core
@@ -256,10 +342,11 @@ static struct i2o_device *i2o_device_add
void i2o_device_remove(struct i2o_device *i2o_dev)
{
i2o_driver_notify_device_remove_all(i2o_dev);
+ i2o_remove_sysfs_links(i2o_dev);
class_device_unregister(&i2o_dev->classdev);
list_del(&i2o_dev->list);
device_unregister(&i2o_dev->device);
-};
+}

/**
* i2o_device_parse_lct - Parse a previously fetched LCT and create devices
@@ -337,99 +424,8 @@ int i2o_device_parse_lct(struct i2o_cont
up(&c->lct_lock);

return 0;
-};
-
-/**
- * i2o_device_class_show_class_id - Displays class id of I2O device
- * @cd: class device of which the class id should be displayed
- * @buf: buffer into which the class id should be printed
- *
- * Returns the number of bytes which are printed into the buffer.
- */
-static ssize_t i2o_device_class_show_class_id(struct class_device *cd,
- char *buf)
-{
- struct i2o_device *dev = to_i2o_device(cd->dev);
-
- sprintf(buf, "0x%03x\n", dev->lct_data.class_id);
- return strlen(buf) + 1;
-};
-
-/**
- * i2o_device_class_show_tid - Displays TID of I2O device
- * @cd: class device of which the TID should be displayed
- * @buf: buffer into which the class id should be printed
- *
- * Returns the number of bytes which are printed into the buffer.
- */
-static ssize_t i2o_device_class_show_tid(struct class_device *cd, char *buf)
-{
- struct i2o_device *dev = to_i2o_device(cd->dev);
-
- sprintf(buf, "0x%03x\n", dev->lct_data.tid);
- return strlen(buf) + 1;
-};
-
-/* I2O device class attributes */
-static CLASS_DEVICE_ATTR(class_id, S_IRUGO, i2o_device_class_show_class_id,
- NULL);
-static CLASS_DEVICE_ATTR(tid, S_IRUGO, i2o_device_class_show_tid, NULL);
-
-/**
- * i2o_device_class_add - Adds attributes to the I2O device
- * @cd: I2O class device which is added to the I2O device class
- *
- * This function get called when a I2O device is added to the class. It
- * creates the attributes for each device and creates user/parent symlink
- * if necessary.
- *
- * Returns 0 on success or negative error code on failure.
- */
-static int i2o_device_class_add(struct class_device *cd)
-{
- struct i2o_device *i2o_dev, *tmp;
- struct i2o_controller *c;
-
- i2o_dev = to_i2o_device(cd->dev);
- c = i2o_dev->iop;
-
- class_device_create_file(cd, &class_device_attr_class_id);
- class_device_create_file(cd, &class_device_attr_tid);
-
- /* create user entries for this device */
- tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid);
- if (tmp && (tmp != i2o_dev))
- sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
- "user");
-
- /* create user entries refering to this device */
- list_for_each_entry(tmp, &c->devices, list)
- if ((tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
- && (tmp != i2o_dev))
- sysfs_create_link(&tmp->device.kobj,
- &i2o_dev->device.kobj, "user");
-
- /* create parent entries for this device */
- tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid);
- if (tmp && (tmp != i2o_dev))
- sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
- "parent");
-
- /* create parent entries refering to this device */
- list_for_each_entry(tmp, &c->devices, list)
- if ((tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
- && (tmp != i2o_dev))
- sysfs_create_link(&tmp->device.kobj,
- &i2o_dev->device.kobj, "parent");
-
- return 0;
-};
+}

-/* I2O device class interface */
-static struct class_interface i2o_device_class_interface = {
- .class = &i2o_device_class,
- .add = i2o_device_class_add
-};

/*
* Run time support routines
@@ -553,11 +549,11 @@ int i2o_parm_field_get(struct i2o_device
}

/*
- * if oper == I2O_PARAMS_TABLE_GET, get from all rows
- * if fieldcount == -1 return all fields
+ * if oper == I2O_PARAMS_TABLE_GET, get from all rows
+ * if fieldcount == -1 return all fields
* ibuf and ibuflen are unused (use NULL, 0)
- * else return specific fields
- * ibuf contains fieldindexes
+ * else return specific fields
+ * ibuf contains fieldindexes
*
* if oper == I2O_PARAMS_LIST_GET, get from specific rows
* if fieldcount == -1 return all fields
@@ -611,14 +607,8 @@ int i2o_parm_table_get(struct i2o_device
*/
int i2o_device_init(void)
{
- int rc;
-
- rc = class_register(&i2o_device_class);
- if (rc)
- return rc;
-
- return class_interface_register(&i2o_device_class_interface);
-};
+ return class_register(&i2o_device_class);
+}

/**
* i2o_device_exit - I2O devices exit function
@@ -627,9 +617,8 @@ int i2o_device_init(void)
*/
void i2o_device_exit(void)
{
- class_interface_register(&i2o_device_class_interface);
class_unregister(&i2o_device_class);
-};
+}

EXPORT_SYMBOL(i2o_device_claim);
EXPORT_SYMBOL(i2o_device_claim_release);