diff options
Diffstat (limited to 'drivers/char/tpm/tpm.c')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 023dfbaffe7..e38054b33bb 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -843,7 +843,7 @@ int tpm_do_selftest(struct tpm_chip *chip) { int rc; unsigned int loops; - unsigned int delay_msec = 1000; + unsigned int delay_msec = 100; unsigned long duration; struct tpm_cmd_t cmd; @@ -864,6 +864,14 @@ int tpm_do_selftest(struct tpm_chip *chip) cmd.header.in = pcrread_header; cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0); rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE); + /* Some buggy TPMs will not respond to tpm_tis_ready() for + * around 300ms while the self test is ongoing, keep trying + * until the self test duration expires. */ + if (rc == -ETIME) { + dev_info(chip->dev, HW_ERR "TPM command timed out during continue self test"); + msleep(delay_msec); + continue; + } if (rc < TPM_HEADER_SIZE) return -EFAULT; |