diff options
Diffstat (limited to 'drivers/char/tpm/tpm-interface.c')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 038b91bcbd31..e3beeb2a93dc 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -497,10 +497,19 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, if (rc < 0) { if (rc != -EPIPE) dev_err(&chip->dev, - "%s: tpm_send: error %d\n", __func__, rc); + "%s: send(): error %d\n", __func__, rc); goto out; } + /* A sanity check. send() should just return zero on success e.g. + * not the command length. + */ + if (rc > 0) { + dev_warn(&chip->dev, + "%s: send(): invalid value %d\n", __func__, rc); + rc = 0; + } + if (chip->flags & TPM_CHIP_FLAG_IRQ) goto out_recv; |