Fix hanging before shutdown/suspend behaviour on some buggy
platform firmwares.
Adam Alves (1):
Some buggy firmwares might require the TPM device to be in default
locality (Locality 0) before suspend or shutdown. Failing to do so
would leave the system in a hanged state before sleep or power off
(after “reboot: Power down” message). Such is the case for the
ASUSTeK COMPUTER INC. TUF GAMING B460M-PLUS board, I believe this
might be the case for several other boards based on the bugs I have
found on the internet while trying to find out how to fix my
specific issue. Most forums suggest the user to disable the TPM
device on firmware BIOS in order to work around this specific issue,
which disables several nice security features provided by TPM, such
as secure boot attestation, automatic decryption and hardware random
generator.
drivers/char/tpm/tpm-chip.c | 9 ++++++++
drivers/char/tpm/tpm-interface.c | 36 +++++++++++++++++++++++++++++++-
drivers/char/tpm/tpm.h | 1 +
include/linux/tpm.h | 1 +
4 files changed, 46 insertions(+), 1 deletion(-)
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2.44.0
