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

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Message-ID: <20200104043259.krg7uo6q7owg4fka@cantor>
Date:   Fri, 3 Jan 2020 21:32:59 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.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 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>