[PATCH 2/2] tee: avoid explicit sysfs_create/delete_group by initialising dev->groups

[Sudeep Holla]

If the dev->groups is initialised, the sysfs group is created as part
of device_add call. There is no need to call sysfs_create/delete_group
explicitly.

Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com>
---
 drivers/tee/tee_core.c | 21 ++++-----------------
 1 file changed, 4 insertions(+), 17 deletions(-)

diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index b4a8b362d78f..f77d64fafead 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -962,9 +962,7 @@ static struct attribute *tee_dev_attrs[] = {
        NULL
 };
 
-static const struct attribute_group tee_dev_group = {
-       .attrs = tee_dev_attrs,
-};
+ATTRIBUTE_GROUPS(tee_dev);
 
 /**
  * tee_device_register() - Registers a TEE device
@@ -984,6 +982,8 @@ int tee_device_register(struct tee_device *teedev)
                return -EINVAL;
        }
 
+       teedev->dev.groups = tee_dev_groups;
+
        rc = cdev_device_add(&teedev->cdev, &teedev->dev);
        if (rc) {
                dev_err(&teedev->dev,
@@ -993,19 +993,8 @@ int tee_device_register(struct tee_device *teedev)
                return rc;
        }
 
-       rc = sysfs_create_group(&teedev->dev.kobj, &tee_dev_group);
-       if (rc) {
-               dev_err(&teedev->dev,
-                       "failed to create sysfs attributes, err=%d\n", rc);
-               goto err_sysfs_create_group;
-       }
-
        teedev->flags |= TEE_DEVICE_FLAG_REGISTERED;
        return 0;
-
-err_sysfs_create_group:
-       cdev_device_del(&teedev->cdev, &teedev->dev);
-       return rc;
 }
 EXPORT_SYMBOL_GPL(tee_device_register);
 
@@ -1048,10 +1037,8 @@ void tee_device_unregister(struct tee_device *teedev)
        if (!teedev)
                return;
 
-       if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED) {
-               sysfs_remove_group(&teedev->dev.kobj, &tee_dev_group);
+       if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED)
                cdev_device_del(&teedev->cdev, &teedev->dev);
-       }
 
        tee_device_put(teedev);
        wait_for_completion(&teedev->c_no_users);
-- 
2.17.1