diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_core.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index e3bf31b37138..73f4c4bbc4df 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -180,11 +180,13 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); int size = 0, burstcnt, rc; - while (size < count && - wait_for_tpm_stat(chip, + while (size < count) { + rc = wait_for_tpm_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, chip->timeout_c, - &priv->read_queue, true) == 0) { + &priv->read_queue, true); + if (rc < 0) + return rc; burstcnt = min_t(int, get_burstcount(chip), count - size); rc = tpm_tis_read_bytes(priv, TPM_DATA_FIFO(priv->locality), @@ -229,8 +231,11 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count) goto out; } - wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, - &priv->int_queue, false); + if (wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, + &priv->int_queue, false) < 0) { + size = -ETIME; + goto out; + } status = tpm_tis_status(chip); if (status & TPM_STS_DATA_AVAIL) { /* retry? */ dev_err(&chip->dev, "Error left over data\n"); @@ -279,8 +284,11 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len) count += burstcnt; - wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, - &priv->int_queue, false); + if (wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, + &priv->int_queue, false) < 0) { + rc = -ETIME; + goto out_err; + } status = tpm_tis_status(chip); if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) { rc = -EIO; @@ -293,8 +301,11 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len) if (rc < 0) goto out_err; - wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, - &priv->int_queue, false); + if (wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c, + &priv->int_queue, false) < 0) { + rc = -ETIME; + goto out_err; + } status = tpm_tis_status(chip); if (!itpm && (status & TPM_STS_DATA_EXPECT) != 0) { rc = -EIO; |