On Tue, Jan 19, 2021 at 07:43:18AM +0100, Hannes Reinecke wrote:

The original design to use device-managed resource allocation
doesn't really work as the NVMe controller has a vastly different
lifetime than the hwmon sysfs attributes, causing warning about
duplicate sysfs entries upon reconnection.

To give Guenter a bit more info, it is not just warnings, user space is
able to crash the system by reading the hwmon entries when the nvme
device has been removed.

and here is the initial report and discussion on this:

  https://lore.kernel.org/linux-nvme/20201209213228.5044-1-ematsumiya@suse.de/ (local)

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