RE: [PATCH] acpi/nfit: Require opt-in for read-only label configurations

[Dexuan Cui]

> From: Dan Williams <dan.j.williams@xxxxxxxxx>
> Sent: Sunday, February 3, 2019 11:29 AM
> ...
> Recent fixes to command handling enabled Linux to read label
> configurations that it could not before. Unfortunately that means that
> configurations that were operating in label-less mode will be broken as
> the kernel ignores the existing namespace configuration and tries to
> honor the new found labels.
> 
> Fortunately this seems limited to a case where Linux can quirk the
> behavior and maintain the existing label-less semantics by default.
> When the platform does not emit an _LSW method, disable all label access
> methods. Provide a 'force_labels' module parameter to allow read-only
> label operation.
> 
> Fixes: 11189c1089da ("acpi/nfit: Fix command-supported detection")
> Reported-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>

Hi Dan,
Thanks for the patch and all the detailed explanation! With this patch,
the "fsdax" namespace can be properly detected now!

Thanks,
-- Dexuan