[PATCH v10 00/17] Remove nested TPM operations

[Jerry Snitselaar]

On Wed Jan 16 19, Jarkko Sakkinen wrote:
>Make the changes necessary to detach TPM space code and TPM activation
>code out of the tpm_transmit() flow because of both of these can cause
>nested tpm_transmit() calls. The nesteds calls make the whole flow hard
>to maintain, and thus, it is better to just fix things now before this
>turns into a bigger mess.
>
>v10:
>* Use void pointers to avoid unnecessary casts in functions paramaters
>  where it makes sense.
>
>v9:
>* Fixed again tpm_try_get_ops().
>* Added missing reviewed-by's.
>
>v8:
>* Re-add the check for ret < 0 after calling tpm_try_transmit() that
>  was dropped by mistake while moving code.
>* Fix error fallback for tpm_try_get_ops() when tpm_chip_start()
>  fails.
>
>v7:
>*  Reorganize series so that more trivial and self-contained changes are
>   in the head.
>
>v6:
>* When tpm_validate_commmand() was moved to tpm2-space.c, the struct for
>  the TPM header was incorrectly declared as struct tpm_input_header.
>* Fix return value in tpm_validate_command().
>
>v5:
>* Add the missing rev's from Stefan Berger.
>
>v4:
>* Return 0 from pcrs_show() when tpm1_pcr_read() fails.
>* Fix error handling flow in tpm_try_transmit().
>* Replace struct tpm_input_header and struct tpm_output_header with
>  struct tpm_header.
>
>v3:
>* Encapsulate power gating code to tpm_chip_start() and tpm_chip_stop().
>* Move TPM power gating code and locking to tpm_try_get_ops() and
>  tpm_put_ops().
>* Call power gating code directly in tpm_chip_register() and
>  tpm2_del_space().
>
>v2:
>* Print tpm2_commit_space() error inside tpm2_commit_space()
>* Error code was not printed when recv() callback failed. It is
>  fixed in this version.
>* Added a patch that removes @space from tpm_transmit().
>* Fixed a regression in earlier series. Forgot to amend the change
>  from the staging area that renames NESTED to UNLOCKED in tpm2-space.c.
>Jarkko Sakkinen (17):
>  tpm: use tpm_buf in tpm_transmit_cmd() as the IO parameter
>  tpm: fix invalid return value in pubek_show()
>  tpm: return 0 from pcrs_show() when tpm1_pcr_read() fails
>  tpm: print tpm2_commit_space() error inside tpm2_commit_space()
>  tpm: declare struct tpm_header
>  tpm: access command header through struct in tpm_try_transmit()
>  tpm: encapsulate tpm_dev_transmit()
>  tpm: call tpm2_flush_space() on error in tpm_try_transmit()
>  tpm: clean up tpm_try_transmit() error handling flow
>  tpm: move tpm_validate_commmand() to tpm2-space.c
>  tpm: move TPM space code out of tpm_transmit()
>  tpm: remove @space from tpm_transmit()
>  tpm: use tpm_try_get_ops() in tpm-sysfs.c.
>  tpm: remove TPM_TRANSMIT_UNLOCKED flag
>  tpm: introduce tpm_chip_start() and tpm_chip_stop()
>  tpm: take TPM chip power gating out of tpm_transmit()
>  tpm: remove @flags from tpm_transmit()
>
> drivers/char/tpm/tpm-chip.c       | 109 ++++++++++++
> drivers/char/tpm/tpm-dev-common.c |  45 ++++-
> drivers/char/tpm/tpm-interface.c  | 264 ++++++------------------------
> drivers/char/tpm/tpm-sysfs.c      | 138 ++++++++++------
> drivers/char/tpm/tpm.h            |  64 +++-----
> drivers/char/tpm/tpm1-cmd.c       |  28 +---
> drivers/char/tpm/tpm2-cmd.c       |  72 +++-----
> drivers/char/tpm/tpm2-space.c     |  91 +++++++---
> drivers/char/tpm/tpm_i2c_atmel.c  |   5 +-
> drivers/char/tpm/tpm_vtpm_proxy.c |  12 +-
> drivers/char/tpm/xen-tpmfront.c   |   2 +-
> 11 files changed, 409 insertions(+), 421 deletions(-)
>
>-- 
>2.19.1
>

Reviewed-by: Jerry Snitselaar <jsnitsel at redhat.com>