diff options
Diffstat (limited to 'src/drivers/i2c')
| -rw-r--r-- | src/drivers/i2c/tpm/tpm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c index 55c25fefa4..972b17de42 100644 --- a/src/drivers/i2c/tpm/tpm.c +++ b/src/drivers/i2c/tpm/tpm.c @@ -291,6 +291,8 @@ static uint8_t tpm_tis_i2c_status(struct tpm_chip *chip) uint8_t buf; if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0) return 0; + else if (buf == 0xff) /* Some TPMs sometimes randomly return 0xff. */ + return 0; else return buf; } @@ -316,7 +318,7 @@ static ssize_t get_burstcount(struct tpm_chip *chip) else burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0]; - if (burstcnt) + if (burstcnt && burstcnt != 0xffffff) return burstcnt; mdelay(TPM_TIMEOUT); timeout--; |