APPLIED(B): [PATCH 0/1][SRU][B/OEM-B] TPM on Dell XPS 13 stopped working after upgrade to 18.04 (LP: #1762672)

[Khaled Elmously]

On 2019-02-20 23:52:39 , Tyler Hicks wrote:
> BugLink: https://bugs.launchpad.net/bugs/1762672
> 
> Certain TPM chips start TPM self test asynchronously and, in Bionic, the kernel
> incorrectly assumes that the self test failed after waiting for a short amount
> of time. This leaves the system without a working TPM chip.
> 
> Straightforward backport to Bionic. Tony Espy has successfully tested the
> backport via a test build that I prepared. I've asked him to update the bug
> description with the SRU template.
> 
> Tyler
> 
> James Bottomley (1):
>   tpm: fix intermittent failure with self tests
> 
>  drivers/char/tpm/tpm-interface.c | 16 ++++++++++--
>  drivers/char/tpm/tpm.h           |  1 +
>  drivers/char/tpm/tpm2-cmd.c      | 56 ++++++++++++----------------------------
>  3 files changed, 31 insertions(+), 42 deletions(-)
> 
> -- 
> 2.7.4
> 
> 
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