[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>

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 5c567414c4bb81ee74250b01a4755d8c30da3dbc..cda9bd6e48e8d19743290a9fec017194a116655b 100644 (file)
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -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;