[PATCH] I2O: remove class interface

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 122 insertions, 133 deletions

diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
index 21f16ba3ac3..551d582e288 100644
--- a/drivers/message/i2o/device.c
+++ b/drivers/message/i2o/device.c
@@ -45,10 +45,10 @@ static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd,
         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 *dev)
         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_device *dev)
         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 device *dev)
         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_alloc(void)
         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(struct i2o_controller *c,
         }
 
         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(struct i2o_controller *c,
         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(struct i2o_controller *c,
 
         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(struct i2o_controller *c,
 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_controller *c)
         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 *i2o_dev, int group, int field,
 }
 
 /*
- *      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 *dev, int oper, int group,
  */
 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);