diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 9ca5c021d0b6..361a1dff8f77 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -966,6 +966,9 @@ ssize_t tpm_show_durations(struct device *dev, struct device_attribute *attr, { struct tpm_chip *chip = dev_get_drvdata(dev); + if (chip->vendor.duration[TPM_LONG] == 0) + return 0; + return sprintf(buf, "%d %d %d [%s]\n", jiffies_to_usecs(chip->vendor.duration[TPM_SHORT]), jiffies_to_usecs(chip->vendor.duration[TPM_MEDIUM]), |