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[SCSI] ses: fix up functionality after class_device->device conversion 

ses uses an unusual two level class hierarchy which broke in this
conversion.  Fix it up still with a two level hierarchy, but this time
let the ses device manage the links to and from the real device in the
enclosure.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-03-15 13:01:40 -05:00
parent 7d15d6a4dc
commit cb6b7f4063
1 changed files with 71 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
drivers/misc/enclosure.c
View File

@ -31,7 +31,6 @@
static LIST_HEAD(container_list);
static DEFINE_MUTEX(container_list_lock);
static struct class enclosure_class;
static struct class enclosure_component_class;
/**
* enclosure_find - find an enclosure given a device
@ -166,6 +165,40 @@ void enclosure_unregister(struct enclosure_device *edev)
}
EXPORT_SYMBOL_GPL(enclosure_unregister);
#define ENCLOSURE_NAME_SIZE 64
static void enclosure_link_name(struct enclosure_component *cdev, char *name)
{
strcpy(name, "enclosure_device:");
strcat(name, cdev->cdev.bus_id);
}
static void enclosure_remove_links(struct enclosure_component *cdev)
{
char name[ENCLOSURE_NAME_SIZE];
enclosure_link_name(cdev, name);
sysfs_remove_link(&cdev->dev->kobj, name);
sysfs_remove_link(&cdev->cdev.kobj, "device");
}
static int enclosure_add_links(struct enclosure_component *cdev)
{
int error;
char name[ENCLOSURE_NAME_SIZE];
error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device");
if (error)
return error;
enclosure_link_name(cdev, name);
error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name);
if (error)
sysfs_remove_link(&cdev->cdev.kobj, "device");
return error;
}
static void enclosure_release(struct device *cdev)
{
struct enclosure_device *edev = to_enclosure_device(cdev);
@ -178,10 +211,15 @@ static void enclosure_component_release(struct device *dev)
{
struct enclosure_component *cdev = to_enclosure_component(dev);
put_device(cdev->dev);
if (cdev->dev) {
enclosure_remove_links(cdev);
put_device(cdev->dev);
}
put_device(dev->parent);
}
static struct attribute_group *enclosure_groups[];
/**
* enclosure_component_register - add a particular component to an enclosure
* @edev: the enclosure to add the component
@ -217,12 +255,14 @@ enclosure_component_register(struct enclosure_device *edev,
ecomp->number = number;
cdev = &ecomp->cdev;
cdev->parent = get_device(&edev->edev);
cdev->class = &enclosure_component_class;
if (name)
snprintf(cdev->bus_id, BUS_ID_SIZE, "%s", name);
else
snprintf(cdev->bus_id, BUS_ID_SIZE, "%u", number);
cdev->release = enclosure_component_release;
cdev->groups = enclosure_groups;
err = device_register(cdev);
if (err)
ERR_PTR(err);
@ -255,10 +295,12 @@ int enclosure_add_device(struct enclosure_device *edev, int component,
cdev = &edev->component[component];
device_del(&cdev->cdev);
if (cdev->dev)
enclosure_remove_links(cdev);
put_device(cdev->dev);
cdev->dev = get_device(dev);
return device_add(&cdev->cdev);
return enclosure_add_links(cdev);
}
EXPORT_SYMBOL_GPL(enclosure_add_device);
@ -442,24 +484,32 @@ static ssize_t get_component_type(struct device *cdev,
}
static struct device_attribute enclosure_component_attrs[] = {
__ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
set_component_fault),
__ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
set_component_status),
__ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
set_component_active),
__ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
set_component_locate),
__ATTR(type, S_IRUGO, get_component_type, NULL),
__ATTR_NULL
static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
set_component_fault);
static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
set_component_status);
static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
set_component_active);
static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
set_component_locate);
static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
static struct attribute *enclosure_component_attrs[] = {
&dev_attr_fault.attr,
&dev_attr_status.attr,
&dev_attr_active.attr,
&dev_attr_locate.attr,
&dev_attr_type.attr,
NULL
};
static struct class enclosure_component_class = {
.name = "enclosure_component",
.owner = THIS_MODULE,
.dev_attrs = enclosure_component_attrs,
.dev_release = enclosure_component_release,
static struct attribute_group enclosure_group = {
.attrs = enclosure_component_attrs,
};
static struct attribute_group *enclosure_groups[] = {
&enclosure_group,
NULL
};
static int __init enclosure_init(void)
@ -469,20 +519,12 @@ static int __init enclosure_init(void)
err = class_register(&enclosure_class);
if (err)
return err;
err = class_register(&enclosure_component_class);
if (err)
goto err_out;
return 0;
err_out:
class_unregister(&enclosure_class);
return err;
}
static void __exit enclosure_exit(void)
{
class_unregister(&enclosure_component_class);
class_unregister(&enclosure_class);
}