• Jerry Snitselaar's avatar
    tpm_tis: override durations for STM tpm with firmware 1.2.8.28 · 5af4f1d5
    Jerry Snitselaar authored
    There was revealed a bug in the STM TPM chipset used in Dell R415s.
    Bug is observed so far only on chipset firmware 1.2.8.28
    (1.2 TPM, device-id 0x0, rev-id 78). After some number of
    operations chipset hangs and stays in inconsistent state:
    
    tpm_tis 00:09: Operation Timed out
    tpm_tis 00:09: tpm_transmit: tpm_send: error -5
    
    Durations returned by the chip are the same like on other
    firmware revisions but apparently with specifically 1.2.8.28 fw
    durations should be reset to 2 minutes to enable tpm chip work
    properly. No working way of updating firmware was found.
    
    This patch adds implementation of ->update_durations method
    that matches only STM devices with specific firmware version.
    
    Cc: Peter Huewe <peterhuewe@gmx.de>
    Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
    Cc: Jason Gunthorpe <jgg@ziepe.ca>
    Signed-off-by: default avatarAlexey Klimov <aklimov@redhat.com>
    Signed-off-by: default avatarJerry Snitselaar <jsnitsel@redhat.com>
    Reviewed-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
    Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> (!update_durations path)
    Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> (!update_durations path)
    5af4f1d5
tpm_tis_core.c 27.9 KB