[PATCH v3 0/4] Have IMA find and use a tpm_chip until system shutdown

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

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

v2->v3:
  - renaming tpm_chip_find_get() to tpm_get_ops()
  - IMA does not lock access to ima_tpm_chip anymore
  - IMA does not have a reboot notifier to release the chip anymore

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

Stefan Berger (4):
  tpm: rename tpm_chip_find_get() to tpm_get_ops()
  tpm: Implement tpm_chip_find() for other subsystems to find a TPM chip
  ima: Use tpm_chip_find() and call TPM functions with a tpm_chip
  ima: Get rid of ima_used_chip and use ima_tpm_chip != NULL instead

 drivers/char/tpm/tpm-chip.c         | 31 +++++++++++++++++++++++++++++--
 drivers/char/tpm/tpm-interface.c    | 14 +++++++-------
 drivers/char/tpm/tpm.h              |  2 +-
 include/linux/tpm.h                 |  5 +++++
 security/integrity/ima/ima.h        |  2 +-
 security/integrity/ima/ima_crypto.c |  4 ++--
 security/integrity/ima/ima_init.c   | 16 +++++-----------
 security/integrity/ima/ima_queue.c  |  4 ++--
 8 files changed, 52 insertions(+), 26 deletions(-)

-- 
2.13.6