Re: tpm device not showing up in /dev anymore

Le 29/08/17 à 18:35, Laurent Bigonville a écrit :
> Le 29/08/17 à 18:00, [email protected] a écrit :
>>> An idea how to troubleshoot this?
>> Can you run git bisect on the changes between 4.11 and 4.12, so that 
>> we find the offending commit? It is probably sufficient to limit the 
>> search to commits that touch something in drivers/char/tpm.
>
> I'll try and keep you posted.

OK I've been able to bisect the problem and the bad commit is:

e6aef069b6e97790cb127d5eeb86ae9ff0b7b0e3 is the first bad commit
commit e6aef069b6e97790cb127d5eeb86ae9ff0b7b0e3
Author: Jerry Snitselaar <[email protected]>
Date:   Mon Mar 27 08:46:04 2017 -0700

     tpm_tis: convert to using locality callbacks
     
     This patch converts tpm_tis to use of the new tpm class ops
     request_locality, and relinquish_locality.
     
     With the move to using the callbacks, release_locality is changed so
     that we now release the locality even if there is no request pending.
     
     This required some changes to the tpm_tis_core_init code path to
     make sure locality is requested when needed:
     
       - tpm2_probe code path will end up calling request/release through
         callbacks, so request_locality prior to tpm2_probe not needed.
     
       - probe_itpm makes calls to tpm_tis_send_data which no longer calls
         request_locality, so add request_locality prior to tpm_tis_send_data
         calls. Also drop release_locality call in middleof probe_itpm, and
         keep locality until release_locality called at end of probe_itpm.
     
     Cc: Peter Huewe <[email protected]>
     Cc: Jarkko Sakkinen <[email protected]>
     Cc: Jason Gunthorpe <[email protected]>
     Cc: Marcel Selhorst <[email protected]>
     Signed-off-by: Jerry Snitselaar <[email protected]>
     Reviewed-by: Jarkko Sakkinen <[email protected]>
     Tested-by: Jarkko Sakkinen <[email protected]>
     Signed-off-by: Jarkko Sakkinen <[email protected]>

:040000 040000 70234365da69959d47076ebb40c8d17f520c3e44 72f21b446e45ea1003de75902b0553deb99157fd M	drivers


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