On Sat, Feb 6, 2021 at 11:49 AM Shawn Guo [off-list ref] wrote:

On Sat, Feb 06, 2021 at 09:49:37AM +0100, Ard Biesheuvel wrote:

quoted

This reverts commit 32cf1a12cad43358e47dac8014379c2f33dfbed4.

The 'exisitng buffer' in this case is the firmware provided table, and
we should not modify that in place. This fixes a crash on arm64 with
initrd table overrides, in which case the DSDT is not mapped with
read/write permissions.

Cc: Robert Moore <redacted>
Cc: Erik Kaneda <redacted>
Cc: "Rafael J. Wysocki" <redacted>
Cc: Len Brown <lenb@kernel.org>
Reported-by: Shawn Guo <redacted>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Tested-by: Shawn Guo <redacted>

Applied, thanks!

Erik, the upstream will need to sync up with this revert.