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.
> 
> 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
> 


Much better! I'm fine with this and it is a regression.

On travel right now but I do have one SLB9670 connected to RPi4.

I'll do peer testing once at home (next week).

BR, Jarkko