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

[Tyler Hicks]

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