This patchset causes all devices in the tpm class to issue TPM2_Shutdown when the system is shutting down. As a prerequisite, it adds a "shutdown" method to "struct class". Backporting to 4.9 since this bug can lock users out of their TPMs. Backport of f77af1516584 'Add "shutdown" to "struct class".' and d1bd4a792d39 'tpm: Issue a TPM2_Shutdown for TPM2 devices.' drivers/base/core.c | 6 +++++- drivers/char/tpm/tpm-chip.c | 36 ++++++++++++++++++++++++++++++++++++ drivers/char/tpm/tpm-sysfs.c | 5 +++++ include/linux/device.h | 2 ++ 4 files changed, 48 insertions(+), 1 deletion(-)