Re: [PATCH] Platform lockdown information in SYSFS

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Aug 03, 2020 at 07:04:56PM -0300, Daniel Gutson wrote:
> > > > Think of this as an input device.  You don't put the random input
> > > > attributes all in one place, you create a new device that represents the
> > > > input interface and register that.
> 
> I'm having trouble with this. What's the dev_t for the child devices?
> I'm doing
>     child_device = device_create(&my_class, &pdev->dev, MKDEV(0, 0),
> NULL, "child");
> pdev is the pci_device (intel-spi-pci)
> dmesg shows
> 
>     sysfs: cannot create duplicate filename '/class/my-class'
>     (call trace)
>     kobject_add_internal failed for my-class with -EEXIST, don't try
> to register things with the same name in the same directory.

Without seeing all of your code, I can't tell you what you are doing
wrong, but the kernel should be giving you a huge hint here...

Don't create duplicate names in the same subdirectory.

thanks,

greg k-h