[PATCH 0/6] Have IMA find and use a tpm_chip until system shutdown

[Stefan Berger]

This series of patches converts IMA's usage of the tpm_chip to find a TPM
chip initially and use it until the machine is shut down. To do this we need
to introduce a kref for the tpm_chip that IMA and all other users of a
tpm_chip hold onto until they don't need the TPM chip anymore.

    Stefan

Stefan Berger (6):
  tpm: Introduce a kref for the tpm_chip
  tpm: Get additional kref with every call to tpm_try_get_ops()
  tpm: Implement tpm_chip_find() for other subsystems to call
  ima: Implement ima_shutdown and register it as a reboot_notifier
  ima: Use tpm_chip_find() and access TPM functions using it
  ima: Get rid of ima_used_chip and use ima_tpm_chip != NULL instead

 drivers/char/tpm/tpm-chip.c         | 54 +++++++++++++++++++++++++++++++++----
 drivers/char/tpm/tpm.h              |  1 +
 include/linux/tpm.h                 |  9 +++++++
 security/integrity/ima/ima.h        |  4 ++-
 security/integrity/ima/ima_crypto.c | 14 +++++++---
 security/integrity/ima/ima_init.c   | 36 ++++++++++++++++++-------
 security/integrity/ima/ima_queue.c  |  9 ++++---
 7 files changed, 105 insertions(+), 22 deletions(-)

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2.13.6