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tpm: take TPM chip power gating out of tpm_transmit()

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Call tpm_chip_start() and tpm_chip_stop() in

* tpm_chip_register()
* tpm_class_shutdown()
* tpm_del_char_device()
* tpm_pm_suspend()
* tpm_try_get_ops() and tpm_put_ops()
* tpm2_del_space()

And remove these calls from tpm_transmit(). The core reason for this
change is that in tpm_vtpm_proxy a locality change requires a virtual
TPM command (a command made up just for that driver).

The consequence of this is that this commit removes the remaining nested
calls.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Tested-by: Alexander Steffen <Alexander.Steffen@infineon.com>
This commit is contained in:
Jarkko Sakkinen
2018-11-05 02:07:56 +02:00
parent 719b7d81f2
commit a3fbfae82b
6 changed files with 40 additions and 37 deletions
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5
drivers/char/tpm/tpm2-space.c
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@@ -60,7 +60,10 @@ int tpm2_init_space(struct tpm_space *space)
void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space)
{
mutex_lock(&chip->tpm_mutex);
tpm2_flush_sessions(chip, space);
if (!tpm_chip_start(chip, 0)) {
tpm2_flush_sessions(chip, space);
tpm_chip_stop(chip, 0);
}
mutex_unlock(&chip->tpm_mutex);
kfree(space->context_buf);
kfree(space->session_buf);