On Wed, Nov 21, 2018 at 10:07:03AM -0500, thesve...@gmail.com wrote:
> +static struct attribute *fieldbus_attrs[] = {
> + &dev_attr_enabled.attr,
> + &dev_attr_card_name.attr,
> + &dev_attr_fieldbus_id.attr,
> + &dev_attr_read_area_size.attr,
> + &dev_attr_write_area_size.attr,
> + &dev_attr_online.attr,
> + &dev_attr_fieldbus_type.attr,
> + NULL,
> +};
> +
> +static umode_t fieldbus_is_visible(struct kobject *kobj, struct attribute
> *attr,
> + int n)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct fieldbus_dev *fb = dev_get_drvdata(dev);
> + umode_t mode = attr->mode;
> +
> + if (attr == &dev_attr_enabled.attr) {
> + mode = 0;
> + if (fb->enable_get)
> + mode |= 0444;
> + if (fb->simple_enable_set)
> + mode |= 0200;
> + }
> +
> + return mode;
> +}
> +
> +static const struct attribute_group fieldbus_group = {
> + .attrs = fieldbus_attrs,
> + .is_visible = fieldbus_is_visible,
> +};
> +__ATTRIBUTE_GROUPS(fieldbus);
Why not just use ATTRIBUTE_GROUPS()?
> +static int __fieldbus_dev_register(struct fieldbus_dev *fb)
> +{
> + dev_t devno;
> + int err;
> +
> + if (!fb)
> + return -EINVAL;
> + if (!fb->read_area || !fb->write_area || !fb->fieldbus_id_get)
> + return -EINVAL;
> + fb->id = ida_simple_get(&fieldbus_ida, 0, MAX_FIELDBUSES, GFP_KERNEL);
> + if (fb->id < 0)
> + return fb->id;
> + devno = MKDEV(MAJOR(fieldbus_devt), fb->id);
> + init_waitqueue_head(&fb->dc_wq);
> + cdev_init(&fb->cdev, &fieldbus_fops);
> + err = cdev_add(&fb->cdev, devno, 1);
> + if (err) {
> + pr_err("fieldbus_dev%d unable to add device %d:%d\n",
> + fb->id, MAJOR(fieldbus_devt), fb->id);
> + goto err_cdev;
> + }
Why do you have a static cdev?
> + fb->dev = device_create(&fieldbus_class, fb->parent, devno, fb,
> + "fieldbus_dev%d", fb->id);
> + if (IS_ERR(fb->dev)) {
> + err = PTR_ERR(fb->dev);
> + goto err_dev_create;
> + }
> + fb->online_sd = sysfs_get_dirent(fb->dev->kobj.sd, "online");
Ick, what? Why? Why are you messing around with a raw sysfs attribute?
Also, you are creating sysfs files and you are not documenting any of
them in Documentation/ABI/ which is not allowed. Please add that to
this patch for the next round.
thanks,
greg k-h
