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Driver core: add device_type to struct device

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This allows us to add type specific attributes, uevent vars and
release funtions.

A subsystem can carry different types of devices like the "block"
subsys has disks and partitions. Both types create a different set
of attributes, but belong to the same subsystem.

This corresponds to the low level objects:
  kobject   -> device       (object/device data)
  kobj_type -> device_type  (type of object/device we are embedded in)
  kset      -> class/bus    (list of objects/devices of a subsystem)

Signed-off-by: Kay Sievers <kay.sievers@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2006-10-07 21:54:55 +02:00
committed by Greg Kroah-Hartman
parent 239378f16a
commit f9f852df2f
3 changed files with 49 additions and 20 deletions
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57
drivers/base/core.c
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@@ -95,6 +95,8 @@ static void device_release(struct kobject * kobj)
if (dev->release)
dev->release(dev);
else if (dev->type && dev->type->release)
dev->type->release(dev);
else if (dev->class && dev->class->dev_release)
dev->class->dev_release(dev);
else {
@@ -206,19 +208,25 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
if (dev->bus && dev->bus->uevent) {
/* have the bus specific function add its stuff */
retval = dev->bus->uevent(dev, envp, num_envp, buffer, buffer_size);
if (retval) {
pr_debug ("%s - uevent() returned %d\n",
if (retval)
pr_debug ("%s: bus uevent() returned %d\n",
__FUNCTION__, retval);
}
}
if (dev->class && dev->class->dev_uevent) {
/* have the class specific function add its stuff */
retval = dev->class->dev_uevent(dev, envp, num_envp, buffer, buffer_size);
if (retval) {
pr_debug("%s - dev_uevent() returned %d\n",
__FUNCTION__, retval);
}
if (retval)
pr_debug("%s: class uevent() returned %d\n",
__FUNCTION__, retval);
}
if (dev->type && dev->type->uevent) {
/* have the device type specific fuction add its stuff */
retval = dev->type->uevent(dev, envp, num_envp, buffer, buffer_size);
if (retval)
pr_debug("%s: dev_type uevent() returned %d\n",
__FUNCTION__, retval);
}
return retval;
@@ -269,37 +277,50 @@ static void device_remove_groups(struct device *dev)
static int device_add_attrs(struct device *dev)
{
struct class *class = dev->class;
struct device_type *type = dev->type;
int error = 0;
int i;
if (!class)
return 0;
if (class->dev_attrs) {
if (class && class->dev_attrs) {
for (i = 0; attr_name(class->dev_attrs[i]); i++) {
error = device_create_file(dev, &class->dev_attrs[i]);
if (error)
break;
}
if (error)
while (--i >= 0)
device_remove_file(dev, &class->dev_attrs[i]);
}
if (error)
while (--i >= 0)
device_remove_file(dev, &class->dev_attrs[i]);
if (type && type->attrs) {
for (i = 0; attr_name(type->attrs[i]); i++) {
error = device_create_file(dev, &type->attrs[i]);
if (error)
break;
}
if (error)
while (--i >= 0)
device_remove_file(dev, &type->attrs[i]);
}
return error;
}
static void device_remove_attrs(struct device *dev)
{
struct class *class = dev->class;
struct device_type *type = dev->type;
int i;
if (!class)
return;
if (class->dev_attrs) {
if (class && class->dev_attrs) {
for (i = 0; attr_name(class->dev_attrs[i]); i++)
device_remove_file(dev, &class->dev_attrs[i]);
}
if (type && type->attrs) {
for (i = 0; attr_name(type->attrs[i]); i++)
device_remove_file(dev, &type->attrs[i]);
}
}