diff options
Diffstat (limited to 'drivers/char/tpm/tpm-interface.c')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 3a9149cf0110..cb0e57ee053d 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -29,6 +29,7 @@ #include <linux/mutex.h> #include <linux/spinlock.h> #include <linux/freezer.h> +#include <linux/pm_runtime.h> #include "tpm.h" #include "tpm_eventlog.h" @@ -356,6 +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); + rc = chip->ops->send(chip, (u8 *) buf, count); if (rc < 0) { dev_err(&chip->dev, @@ -397,6 +400,8 @@ out_recv: dev_err(&chip->dev, "tpm_transmit: tpm_recv: error %zd\n", rc); out: + pm_runtime_put_sync(chip->dev.parent); + if (!(flags & TPM_TRANSMIT_UNLOCKED)) mutex_unlock(&chip->tpm_mutex); return rc; |