linux-kernel - Re: [PATCH for-linus-v5.5-rc6 0/3] TPM changes for v5.5-rc6

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Date:   Mon, 06 Jan 2020 19:44:43 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jerry Snitselaar <jsnitsel@...hat.com>
Cc:     linux-integrity@...r.kernel.org,
        Dan Williams <dan.j.williams@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        open list <linux-kernel@...r.kernel.org>,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH for-linus-v5.5-rc6 0/3] TPM changes for v5.5-rc6

On Fri, 2020-01-03 at 21:32 -0700, Jerry Snitselaar wrote:
> On Sat Jan 04 20, Jarkko Sakkinen wrote:
> > There has been a bunch of reports (one from kernel bugzilla linked)
> > reporting that when this commit is applied it causes on some machines
> > boot freezes.
> > 
> > Unfortunately hardware where this commit causes a failure is not widely
> > available (only one I'm aware is Lenovo T490), which means we cannot
> > predict yet how long it will take to properly fix tpm_tis interrupt
> > probing.
> > 
> > Thus, the least worst short term action is to revert the code to the
> > state before this commit. In long term we need fix the tpm_tis probing
> > code to work on machines that Stefan's code was supposed to fix.
> > 
> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=205935
> > Cc: Jerry Snitselaar <jsnitsel@...hat.com>
> > Cc: Dan Williams <dan.j.williams@...el.com>
> > 
> > Jarkko Sakkinen (1):
> >  tpm: Revert "tpm_tis: reserve chip for duration of tpm_tis_core_init"
> > 
> > Stefan Berger (2):
> >  tpm: Revert "tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for
> >    interrupts"
> >  tpm: Revert "tpm_tis_core: Turn on the TPM before probing IRQ's"
> > 
> > drivers/char/tpm/tpm_tis_core.c | 34 +++++++++++++++------------------
> > 1 file changed, 15 insertions(+), 19 deletions(-)
> > 
> > -- 
> > 2.20.1
> > 
> 
> Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>

I'm sorry but forgot to append this before sending pull request :-/

/Jarkko