diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index ef0fcdb40cc3..a2688ac2b48f 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -357,7 +357,8 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz, if (!(flags & TPM_TRANSMIT_UNLOCKED)) mutex_lock(&chip->tpm_mutex); - pm_runtime_get_sync(chip->dev.parent); + if (chip->dev.parent) + pm_runtime_get_sync(chip->dev.parent); rc = chip->ops->send(chip, (u8 *) buf, count); if (rc < 0) { @@ -400,7 +401,8 @@ out_recv: dev_err(&chip->dev, "tpm_transmit: tpm_recv: error %zd\n", rc); out: - pm_runtime_put_sync(chip->dev.parent); + if (chip->dev.parent) + pm_runtime_put_sync(chip->dev.parent); if (!(flags & TPM_TRANSMIT_UNLOCKED)) mutex_unlock(&chip->tpm_mutex); |