On Wed, Aug 07, 2019 at 04:08:25PM +0800, Wu Hao wrote:

On Wed, Aug 07, 2019 at 10:45:22AM +0800, Wu Hao wrote:

quoted

On Mon, Aug 05, 2019 at 05:56:26PM +0200, Greg KH wrote:

quoted

On Sun, Aug 04, 2019 at 06:20:21PM +0800, Wu Hao wrote:

quoted

+static int fme_global_err_init(struct platform_device *pdev,
+			       struct dfl_feature *feature)
+{
+	struct device *dev;
+	int ret = 0;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	dev->parent = &pdev->dev;
+	dev->release = err_dev_release;
+	dev_set_name(dev, "errors");
+
+	fme_error_enable(feature);
+
+	ret = device_register(dev);
+	if (ret) {
+		put_device(dev);
+		return ret;
+	}
+
+	ret = device_add_groups(dev, error_groups);

cute, but no, you do not create a whole struct device for a subdir.  Use
the attribute group name like you did on earlier patches.

Sure, let me fix it in the next version.

quoted

And again, you raced userspace and lost :(

Same here, could you please give some more hints here?

Oh.. I see..

I should follow [1] as this is a platform driver. I will fix it. Thanks!

[PATCH 00/11] Platform drivers, provide a way to add sysfs groups easily

[1]https://lkml.org/lkml/2019/7/4/181

Yes, that is the correct thing to do.

thanks,

greg k-h