diff options
-rw-r--r-- | drivers/char/tpm/tpm_tis_core.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index e3bf31b..a1ce060 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -185,7 +185,12 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) TPM_STS_DATA_AVAIL | TPM_STS_VALID, chip->timeout_c, &priv->read_queue, true) == 0) { - burstcnt = min_t(int, get_burstcount(chip), count - size); + burstcnt = get_burstcount(chip); + if (burstcnt < 0) { + dev_err(&chip->dev, "Unable to read burstcount\n"); + return burstcnt; + } + burstcnt = min_t(int, burstcnt, count - size); rc = tpm_tis_read_bytes(priv, TPM_DATA_FIFO(priv->locality), burstcnt, buf + size); @@ -271,7 +276,13 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len) } while (count < len - 1) { - burstcnt = min_t(int, get_burstcount(chip), len - count - 1); + burstcnt = get_burstcount(chip); + if (burstcnt < 0) { + dev_err(&chip->dev, "Unable to read burstcount\n"); + rc = burstcnt; + goto out_err; + } + burstcnt = min_t(int, burstcnt, len - count - 1); rc = tpm_tis_write_bytes(priv, TPM_DATA_FIFO(priv->locality), burstcnt, buf + count); if (rc < 0) |