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[S390] ccwgroup: move attributes to attribute group 

Put sysfs attributes of ccwgroup devices in an attribute group to
ensure that these attributes are actually present when userspace
is notified via uevents.

Cc: stable@kernel.org
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2011-10-30 15:16:52 +01:00 committed by Martin Schwidefsky
parent d4e81b35b8
commit dbdf1afcaa
1 changed files with 22 additions and 20 deletions
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42
drivers/s390/cio/ccwgroup.c
View File

@ -87,6 +87,12 @@ static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
}
}
static ssize_t ccwgroup_online_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count);
static ssize_t ccwgroup_online_show(struct device *dev,
struct device_attribute *attr,
char *buf);
/*
* Provide an 'ungroup' attribute so the user can remove group devices no
* longer needed or accidentially created. Saves memory :)
@ -134,6 +140,20 @@ out:
}
static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
static struct attribute *ccwgroup_attrs[] = {
&dev_attr_online.attr,
&dev_attr_ungroup.attr,
NULL,
};
static struct attribute_group ccwgroup_attr_group = {
.attrs = ccwgroup_attrs,
};
static const struct attribute_group *ccwgroup_attr_groups[] = {
&ccwgroup_attr_group,
NULL,
};
static void
ccwgroup_release (struct device *dev)
@ -293,25 +313,17 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
}
dev_set_name(&gdev->dev, "%s", dev_name(&gdev->cdev[0]->dev));
gdev->dev.groups = ccwgroup_attr_groups;
rc = device_add(&gdev->dev);
if (rc)
goto error;
get_device(&gdev->dev);
rc = device_create_file(&gdev->dev, &dev_attr_ungroup);
if (rc) {
device_unregister(&gdev->dev);
goto error;
}
rc = __ccwgroup_create_symlinks(gdev);
if (!rc) {
mutex_unlock(&gdev->reg_mutex);
put_device(&gdev->dev);
return 0;
}
device_remove_file(&gdev->dev, &dev_attr_ungroup);
device_unregister(&gdev->dev);
error:
for (i = 0; i < num_devices; i++)
@ -423,7 +435,7 @@ ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const
int ret;
if (!dev->driver)
return -ENODEV;
return -EINVAL;
gdev = to_ccwgroupdev(dev);
gdrv = to_ccwgroupdrv(dev->driver);
@ -456,8 +468,6 @@ ccwgroup_online_show (struct device *dev, struct device_attribute *attr, char *b
return sprintf(buf, online ? "1\n" : "0\n");
}
static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
static int
ccwgroup_probe (struct device *dev)
{
@ -469,12 +479,7 @@ ccwgroup_probe (struct device *dev)
gdev = to_ccwgroupdev(dev);
gdrv = to_ccwgroupdrv(dev->driver);
if ((ret = device_create_file(dev, &dev_attr_online)))
return ret;
ret = gdrv->probe ? gdrv->probe(gdev) : -ENODEV;
if (ret)
device_remove_file(dev, &dev_attr_online);
return ret;
}
@ -485,9 +490,6 @@ ccwgroup_remove (struct device *dev)
struct ccwgroup_device *gdev;
struct ccwgroup_driver *gdrv;
device_remove_file(dev, &dev_attr_online);
device_remove_file(dev, &dev_attr_ungroup);
if (!dev->driver)
return 0;