Re: [PATCH v2] tpm: restore timeout for key creation commands

[Jarkko Sakkinen]

On Tue, Apr 21, 2026 at 08:50:20AM +0800, Baoli Zhang wrote:
> From: "Baoli Zhang" <baoli.zhang@xxxxxxxxxxxxxxx>
> 
> Commit 207696b17f38 ("tpm: use a map for tpm2_calc_ordinal_duration()")
> inadvertently reduced the timeout for TPM2 key creation commands
> (`CREATE_PRIMARY`, `CREATE`, `CREATE_LOADED`) from 300 seconds to 30
> seconds.
> 
> This causes intermittent timeout failures, with several failures observed
> across hundreds of test runs on some Intel platforms using Infineon
> SLB9670 and SLB9672 TPM modules. Restore the timeout to 300 seconds to
> avoid spurious failures.

Is this a production case?

I'm not sure if there is anything to fix tbh. I mean it is
pretty much the same as "maintaining compatibility to OTT driver"
to addresses issues on undisclosed hardware.

Please correct me if I'm wrong. Otherwise, I'd carry out internal patch
to tweak this for pre-production hardware (presumably).

> 
> Fixes: 207696b17f38 ("tpm: use a map for tpm2_calc_ordinal_duration()")
> Co-developed-by: Lili Li <lili.li@xxxxxxxxx>
> Signed-off-by: Lili Li <lili.li@xxxxxxxxx>
> Signed-off-by: Baoli Zhang <baoli.zhang@xxxxxxxxxxxxxxx>
> ---
> Changes in v2:
> - Add description of intermittent nature of the timeout issue.
> - Fix Co-developed-by and Signed-off-by tag ordering.
> 
> v1: https://patchwork.kernel.org/project/linux-integrity/patch/20260410014940.3557934-1-baoli.zhang@xxxxxxxxxxxxxxx/
> 
>  drivers/char/tpm/tpm2-cmd.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 3a77be7ebf4aa..430022f695f24 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -71,9 +71,9 @@ static const struct {
>  	{TPM2_CC_HIERARCHY_CHANGE_AUTH, 2000},
>  	{TPM2_CC_GET_CAPABILITY, 750},
>  	{TPM2_CC_NV_READ, 2000},
> -	{TPM2_CC_CREATE_PRIMARY, 30000},
> -	{TPM2_CC_CREATE, 30000},
> -	{TPM2_CC_CREATE_LOADED, 30000},
> +	{TPM2_CC_CREATE_PRIMARY, 300000},
> +	{TPM2_CC_CREATE, 300000},
> +	{TPM2_CC_CREATE_LOADED, 300000},
>  };
>  
>  /**
> -- 
> 2.43.0
> 

BR, Jarkko