Public bug reported:
SRU justification:
[Impact]
System will reboot when resume from S3 with some TPM chips installed.
[Fix]
stable patch is merged in 4.15 kernel:
888d867df441 (tpm: cmd_ready command can be issued only after granting locality)
it needs a fix:
tpm: separate cmd_ready/go_idle from runtime_pm
these 2 patches fix the issue and enable tpm resume
after seprating cmd_ready/go_idle.
[Test]
Verified on hardware. resume from S3 about 30 times with positive result.
[Regression Potential]
Medium, stable patches backported. Verified on hardware.
backported with minor adjustion.
These 2 patches are included in 4.18 and 5.0 kernel, only 4.15 needs
them.
** Affects: hwe-next
Importance: Undecided
Assignee: AaronMa (mapengyu)
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1833655 sutton
** Tags added: oem-priority originate-from-1833655 sutton
** Changed in: hwe-next
Assignee: (unassigned) => AaronMa (mapengyu)
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https://bugs.launchpad.net/bugs/1836031
Title:
[SRU][B/B-OEM]Fix resume failure on some TPM chips
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