[PATCH v4] TPM fixes

[Lino Sanfilippo]

This patch fixes a reference count issue in the TPM core code. It is based
on a suggestion and basic implementation made by Jason Gunthorpe.

Changes in v4:
- drop patch 2 (tpm: in tpm2_del_space check if ops pointer is still
valid) since James Bottomley offered a cleaner solution for this
- reimplement patch 1 to setup the /dev/tpmrm device only in case of TPM2
and avoid the installation of another action handler
- add proper tag for stable

Changes in v3:
- drop the patch that introduces the new function tpm_chip_free()
- rework the commit messages for the patches (style, typos, etc.)
- add fixes tag to patch 2
- add James Bottomley to cc list
- add stable mailing list to cc list

Changes in v2:
- drop the patch that erroneously cleaned up after failed installation of
  an action handler in tpmm_chip_alloc() (pointed out by Jarkko Sakkinen)
- make the commit message for patch 1 more detailed
- add fixes tags and kernel logs

Lino Sanfilippo (1):
  tpm: fix reference counting for struct tpm_chip

 drivers/char/tpm/tpm-chip.c | 80 ++++++++++++++++++++++++++++-----------------
 1 file changed, 50 insertions(+), 30 deletions(-)

-- 
2.7.4