On Sun, Oct 22, 2017 at 12:16:19PM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfr...@users.sourceforge.net>
> Date: Sun, 22 Oct 2017 11:41:09 +0200
>
> Add a jump target so that a specific error code assignment for timeout
> conditions will be in the implementation only at the end of this function.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
> ---
> drivers/char/tpm/tpm_tis_core.c | 26 ++++++++++++--------------
> 1 file changed, 12 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index fdde971bc810..3681f7a74d1b 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -262,12 +262,10 @@ static int tpm_tis_send_data(struct tpm_chip *chip,
> const u8 *buf, size_t len)
> status = tpm_tis_status(chip);
> if ((status & TPM_STS_COMMAND_READY) == 0) {
> tpm_tis_ready(chip);
> - if (wait_for_tpm_stat
> - (chip, TPM_STS_COMMAND_READY, chip->timeout_b,
> - &priv->int_queue, false) < 0) {
> - rc = -ETIME;
> - goto out_err;
> - }
> + if (wait_for_tpm_stat(chip, TPM_STS_COMMAND_READY,
> + chip->timeout_b, &priv->int_queue, false)
> + < 0)
> + goto report_timeout;
> }
>
> while (count < len - 1) {
> @@ -286,10 +284,9 @@ static int tpm_tis_send_data(struct tpm_chip *chip,
> const u8 *buf, size_t len)
> count += burstcnt;
>
> if (wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c,
> - &priv->int_queue, false) < 0) {
> - rc = -ETIME;
> - goto out_err;
> - }
> + &priv->int_queue, false) < 0)
> + goto report_timeout;
> +
> status = tpm_tis_status(chip);
> if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
> rc = -EIO;
> @@ -303,10 +300,9 @@ static int tpm_tis_send_data(struct tpm_chip *chip,
> const u8 *buf, size_t len)
> goto out_err;
>
> if (wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c,
> - &priv->int_queue, false) < 0) {
> - rc = -ETIME;
> - goto out_err;
> - }
> + &priv->int_queue, false) < 0)
> + goto report_timeout;
> +
> status = tpm_tis_status(chip);
> if (!itpm && (status & TPM_STS_DATA_EXPECT) != 0) {
> rc = -EIO;
> @@ -315,6 +311,8 @@ static int tpm_tis_send_data(struct tpm_chip *chip, const
> u8 *buf, size_t len)
>
> return 0;
>
> +report_timeout:
> + rc = -ETIME;
> out_err:
> tpm_tis_ready(chip);
> return rc;
> --
> 2.14.2
>
NAK. wait_for_tpm_stat() should give that error code.
/Jarkko
