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

["Zhang, Baoli" <baoli.zhang@linux.intel.com>]

On 5/4/2026 11:13 PM, Jarkko Sakkinen wrote:
> On Tue, Apr 21, 2026 at 08:50:20AM +0800, Baoli Zhang wrote:
>> From: "Baoli Zhang" <baoli.zhang@linux.intel.com>
>>
>> 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).
Hi Jarkko, this is indeed a production case. We discovered this issue 
during validation testing for the sustaining release.
>> Fixes: 207696b17f38 ("tpm: use a map for tpm2_calc_ordinal_duration()")
>> Co-developed-by: Lili Li <lili.li@intel.com>
>> Signed-off-by: Lili Li <lili.li@intel.com>
>> Signed-off-by: Baoli Zhang <baoli.zhang@linux.intel.com>
>> ---
>> 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@linux.intel.com/
>>
>>   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