Re: [PATCH 1/1] cxl/acpi.c: Add buggy BIOS hint for CXL ACPI lookup failure

Dan Williams
2024-05-01T15:47:29Z

PJ Waskiewicz wrote:
> Buggy BIOS, that above value resolves to CX02. In fact, it *should* be
> 49. This is very much a bug in the ACPI arena.

Ok, so back to this patch in question, my concern with upgrading:

dev_err(dev, "unable to retrieve _UID\n");

...to say "potentially buggy BIOS", is that same charge could be levied
against all of the dev_warn() and dev_err() instances in
drivers/cxl/acpi.c. So, it's not clear to me that cxl_acpi driver
failures need to be more explicit.

Otherwise, pretty much any ACPI hiccup message in the kernel would be
candidate for claiming "BIOS is busted".