On Mon, Sep 28, 2020 at 10:49:56AM -0700, Hao Wu wrote: > Hi Jarkko, > > https://github.com/torvalds/linux/commit/9f3fc7bcddcb51234e23494531f93ab60475e1c3 > Is the one introducing the issue since 4.14. Then the other three commits > changed the relevant code a bit. Probably you can check the timestamp / release version > on each commit to understand the relationship. > > I think the original patch commit message can help you understand the root cause. > Attaching the commit here for your convenience. > > Thanks > Hao Please, again, when you respond quote properly instead of putting your response on top. Thank you. Yes, I know the issue and it is already documented also in the James' earlier patch that did a similar change. I.e. for some reason some TPM's (or the bus itself) do not like poking it too often. So: what if you revert on using msleep(TPM_TIMEOUT) in wait_for_tpm_stat(), i.e. revert to the behaviour before the aformentioned commit? /Jarkko
