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

v1->v2:
  - use the kref of the device via get_device()/put_device()

Stefan Berger (4):
  tpm: Implement tpm_chip_find() and tpm_chip_put() for other subsystems
  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         | 37 +++++++++++++++++++++++++++++++++++++
 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 ++++++---
 6 files changed, 92 insertions(+), 17 deletions(-)

-- 
2.13.6