[Regression 4.15-rc2] New messages `tpm tpm0: A TPM error (2314) occurred continue selftest`

[Paul Menzel <pmenzel@molgen.mpg.de>]

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Dear Linux folks,


With Linux 4.15-rc2 built by the Ubuntu Kernel Team, the error messages 
below are shown by the Linux kernel. These are new.

```
Dez 06 13:22:24 Ixpees kernel: microcode: microcode updated early to 
revision 0x62, date = 2017-04-27
Dez 06 13:22:24 Ixpees kernel: Linux version 4.15.0-041500rc2-generic 
(kernel@gloin) (gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3)) #201712031230 
SMP Sun Dec 3 17:32:03 UTC 2017
Dez 06 13:22:24 Ixpees kernel: Command line: 
BOOT_IMAGE=/vmlinuz-4.15.0-041500rc2-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
Dez 06 13:22:24 Ixpees kernel: KERNEL supported cpus:
Dez 06 13:22:24 Ixpees kernel:   Intel GenuineIntel
Dez 06 13:22:24 Ixpees kernel:   AMD AuthenticAMD
Dez 06 13:22:24 Ixpees kernel:   Centaur CentaurHauls
Dez 06 13:22:24 Ixpees kernel: x86/fpu: Supporting XSAVE feature 0x001: 
'x87 floating point registers'
Dez 06 13:22:24 Ixpees kernel: x86/fpu: Supporting XSAVE feature 0x002: 
'SSE registers'
[…]
Dez 06 13:22:24 Ixpees kernel: tpm_tis MSFT0101:00: 2.0 TPM (device-id 
0xFE, rev-id 4)
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: A TPM error (2314) occurred 
continue selftest
Dez 06 13:22:24 Ixpees kernel: tpm tpm0: TPM self test failed
```

Any idea what to do about those? If these are intentional, it’d be great 
to give some hint to the user, what effect this has.


Kind regards,

Paul


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