linux-kernel - Re: [PATCH] tpm: Start the tpm2 before running a self test.

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Message-ID: <c9a92192-ee28-4bbf-a02d-1df0d5822027@molgen.mpg.de>
Date:   Wed, 22 Nov 2023 08:10:34 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Hermin Anggawijaya <hermin.anggawijaya@...iedtelesis.co.nz>
Cc:     peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tpm: Start the tpm2 before running a self test.


Dear Hermin,


Thank you for your patch.

It’d be great if you removed the dot/period from the end of the commit 
message summary/title.

Am 22.11.23 um 07:55 schrieb Hermin Anggawijaya:
> Before sending a command to attempt the self test, the TPM
> may need to be started, otherwise the self test returns
> TPM2_RC_INITIALIZE value causing a log as follows:
> "tpm tpm0: A TPM error (256) occurred attempting the self test".

Please document on what platform this happens.

> Signed-off-by: Hermin Anggawijaya <hermin.anggawijaya@...iedtelesis.co.nz>
> ---
>   drivers/char/tpm/tpm2-cmd.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 93545be190a5..0530f3b5f86a 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -737,15 +737,15 @@ int tpm2_auto_startup(struct tpm_chip *chip)
>   	if (rc)
>   		goto out;
>   
> +	rc = tpm2_startup(chip);
> +	if (rc && rc != TPM2_RC_INITIALIZE)
> +		goto out;
> +
>   	rc = tpm2_do_selftest(chip);
>   	if (rc && rc != TPM2_RC_INITIALIZE)
>   		goto out;
>   
>   	if (rc == TPM2_RC_INITIALIZE) {
> -		rc = tpm2_startup(chip);
> -		if (rc)
> -			goto out;
> -
>   		rc = tpm2_do_selftest(chip);
>   		if (rc)
>   			goto out;


Kind regards,

Paul