[PATCH] nvme: warn only once for legacy uuid attribute

[Christoph Hellwig]

On Wed, Jul 12, 2023 at 07:59:21AM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch at kernel.org>
> 
> Report the legacy fallback behavior for uuid attributes just once
> instead of logging repeated warnings for the same condition every time
> the attribute is read. The old behavior is too spamy on the kernel logs.

Warning on allocation just seems wrong - no uuid is perfectly fine.
I think what we should do is warn once when reading the attribute
and then never again.