[PATCH net-next 2/6] s390/ccwgroup: use bus->dev_groups for bus-based sysfs attributes

Julian Wiedmann
2020-12-07T13:13:24Z

Bus drivers have their own way of describing the sysfs attributes that
all devices on a bus should provide.
Switch ccwgroup_attr_groups over to use bus->dev_groups, and thus
free up dev->groups for usage by the ccwgroup device drivers.

While adjusting the attribute naming, use ATTRIBUTE_GROUPS() to get rid
of some boilerplate code.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
---
drivers/s390/cio/ccwgroup.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 483a9ecfcbb1..444385da5792 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -210,18 +210,12 @@ static ssize_t ccwgroup_ungroup_store(struct device *dev,
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[] = {
+static struct attribute *ccwgroup_dev_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,
-};
+ATTRIBUTE_GROUPS(ccwgroup_dev);

static void ccwgroup_ungroup_workfn(struct work_struct *work)
{
@@ -384,7 +378,6 @@ int ccwgroup_create_dev(struct device *parent, struct ccwgroup_driver *gdrv,
}

dev_set_name(&gdev->dev, "%s", dev_name(&gdev->cdev[0]->dev));
- gdev->dev.groups = ccwgroup_attr_groups;

if (gdrv) {
gdev->dev.driver = &gdrv->driver;
@@ -487,6 +480,7 @@ static void ccwgroup_shutdown(struct device *dev)

static struct bus_type ccwgroup_bus_type = {
.name = "ccwgroup",
+ .dev_groups = ccwgroup_dev_groups,
.remove = ccwgroup_remove,
.shutdown = ccwgroup_shutdown,
};
--
2.17.1