Re: [REGRESSION] suspend to ram fails in 6.2-rc1 due to tpm errors

[Jarkko Sakkinen]

On Tue, Mar 14, 2023 at 10:35:33AM +0100, Thorsten Leemhuis wrote:
> On 09.01.23 17:08, Jason A. Donenfeld wrote:
> > On Thu, Jan 05, 2023 at 02:59:15PM +0100, Thorsten Leemhuis wrote:
> >> On 29.12.22 05:03, Jason A. Donenfeld wrote:
> >>> On Wed, Dec 28, 2022 at 06:07:25PM -0500, James Bottomley wrote:
> >>>> On Wed, 2022-12-28 at 21:22 +0100, Vlastimil Babka wrote:
> >>>>> Ugh, while the problem [1] was fixed in 6.1, it's now happening again
> >>>>> on the T460 with 6.2-rc1. Except I didn't see any oops message or
> >>>>> "tpm_try_transmit" error this time. The first indication of a problem
> >>>>> is this during a resume from suspend to ram:
> >>>>> tpm tpm0: A TPM error (28) occurred continue selftest
> >>>>> and then periodically 
> >>>>> tpm tpm0: A TPM error (28) occurred attempting get random
> >>>>
> >>>> That's a TPM 1.2 error which means the TPM failed the selftest.  The
> >>>> original problem was reported against TPM 2.0  because of a missing
> >>>> try_get_ops().
> >>>
> >>> No, I'm pretty sure the original bug, which was fixed by "char: tpm:
> >>> Protect tpm_pm_suspend with locks" regards 1.2 as well, especially
> >>> considering it's the same hardware from Vlastimil causing this. I also
> >>> recall seeing this in 1.2 when I ran this with the TPM emulator. So
> >>> that's not correct.
> > [...]
> > So, this is now in rc3:
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1382999aa0548a171a272ca817f6c38e797c458c
> > 
> > That should help avoid the worst of the issue -- laptop not sleeping.
> > But the race or whatever it is still does exist. So you might want to
> > keep this in your tracker to periodically nudge the TPM folks about it.
> 
> I did, and with -rc2 out now is a good time to remind everybody about
> it. Jarkko even looked into it, but no real fix emerged afaics. Or did it?

Jason's workaround was picked. I asked some questions in the thread but
have not received any responses.

BR, Jarkko