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 <[email protected]>
---
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);
On Thu, Sep 15, 2005 at 02:01:32AM -0500, Dmitry Torokhov wrote:
> 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 <[email protected]>
I've applied this. I've also cleaned up the class stuff some more and
converted the drivers/message/i2o/iop.c code to use the easier class and
class_device interfaces, as you should not have 2 refcounted structures
trying to control the same overall structure. The i2o device structure
is still like this and remains to be fixed up. If no one does it soon,
I'll clean it up too.
thanks,
greg k-h
Hello,
Greg KH wrote:
> On Thu, Sep 15, 2005 at 02:01:32AM -0500, Dmitry Torokhov wrote:
>>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 <[email protected]>
> I've applied this. I've also cleaned up the class stuff some more and
> converted the drivers/message/i2o/iop.c code to use the easier class and
> class_device interfaces, as you should not have 2 refcounted structures
> trying to control the same overall structure. The i2o device structure
> is still like this and remains to be fixed up. If no one does it soon,
> I'll clean it up too.
Could you please wait until i supply the patch, if everyone applies
patches it's very hard to get those changes and mine together...
And i really don't see that this change is highly critical...
Thank you very much for your understanding...
Best regards,
Markus Lidel
------------------------------------------
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