diff options
Diffstat (limited to 'drivers/char/tpm/tpm_tis_core.c')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_core.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index d7c440ac465f..b3452259d6e0 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -469,10 +469,17 @@ static int tpm_tis_send_main(struct tpm_chip *chip, const u8 *buf, size_t len) int rc; u32 ordinal; unsigned long dur; - - rc = tpm_tis_send_data(chip, buf, len); - if (rc < 0) - return rc; + unsigned int try; + + for (try = 0; try < TPM_RETRY; try++) { + rc = tpm_tis_send_data(chip, buf, len); + if (rc >= 0) + /* Data transfer done successfully */ + break; + else if (rc != -EIO) + /* Data transfer failed, not recoverable */ + return rc; + } /* go and do it */ rc = tpm_tis_write8(priv, TPM_STS(priv->locality), TPM_STS_GO); |