RE: [Patch v5 2/3] Drivers: hv: add Azure Blob driver

[Long Li]

> Subject: Re: [Patch v5 2/3] Drivers: hv: add Azure Blob driver
> 
> On Thu, Aug 05, 2021 at 12:00:11AM -0700, longli@xxxxxxxxxxxxxxxxx wrote:
> > +static int az_blob_create_device(struct az_blob_device *dev) {
> > +	int ret;
> > +	struct dentry *debugfs_root;
> > +
> > +	dev->misc.minor	= MISC_DYNAMIC_MINOR,
> > +	dev->misc.name	= "azure_blob",
> > +	dev->misc.fops	= &az_blob_client_fops,
> > +
> > +	ret = misc_register(&dev->misc);
> > +	if (ret)
> > +		return ret;
> > +
> > +	debugfs_root = debugfs_create_dir("az_blob", NULL);
> 
> So you try to create a directory in the root of debugfs called "az_blob"
> for every device in the system of this one type?
> 
> That will blow up when you have multiple devices of the same type, please
> fix.

The Hyper-V presents one such device for the whole VM.

I'm sorry I may have misunderstood. Are you suggesting I should create a directory "hyperv" in the root of debugfs and put all the Hyper-V driver debug information there?

> 
> thanks,
> 
> greg k-h