On Tue, Jan 21, 2025 at 11:01:26AM -0600, Leo Sandoval wrote:
> From: Benjamin Herrenschmidt <b...@kernel.crashing.org>
>
> The Microsoft spec for SPCR says "The base address of the Serial Port register
> set described using the ACPI Generic Address Structure, or 0 if console
> redirection is disabled." so return if disable (base address = 0). If this 
> check
> is not done, we may get invalid ports for those particular machines that
> redirection is disabled and at some point hanging the booting execution when
> reading the grub.cfg configuration file.
>
> Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
> Reviewed-by: Leo Sandoval <lsand...@redhat.com>

Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>

Daniel

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