diff options
Diffstat (limited to 'drivers/char/tpm/tpm-interface.c')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 16abbf9cb53a..158c1db83f05 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -389,6 +389,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, ssize_t len = 0; u32 count, ordinal; unsigned long stop; + bool need_locality; if (!tpm_validate_command(chip, space, buf, bufsiz)) return -EINVAL; @@ -412,6 +413,16 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, if (chip->dev.parent) pm_runtime_get_sync(chip->dev.parent); + /* Store the decision as chip->locality will be changed. */ + need_locality = chip->locality == -1; + + if (need_locality && chip->ops->request_locality) { + rc = chip->ops->request_locality(chip, 0); + if (rc < 0) + goto out_no_locality; + chip->locality = rc; + } + rc = tpm2_prepare_space(chip, space, ordinal, buf); if (rc) goto out; @@ -471,6 +482,11 @@ out_recv: rc = tpm2_commit_space(chip, space, ordinal, buf, &len); out: + if (need_locality && chip->ops->relinquish_locality) { + chip->ops->relinquish_locality(chip, chip->locality); + chip->locality = -1; + } +out_no_locality: if (chip->dev.parent) pm_runtime_put_sync(chip->dev.parent); |