Messages in this thread Patch in this message | | | Date | Wed, 10 Oct 2018 15:38:17 +0200 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH] tpm: fix unused-value issues in tpm_try_transmit |
| |
Currently, there are some values assigned to variable *rc*, which are never actually used in any computation, because such variable is updated at line 550, before they can be used:
549out: 550 rc = tpm_go_idle(chip, flags); 551 if (rc) 552 goto out;
Fix this by removing such assignments.
Addresses-Coverity-ID: 1470245 ("Unused value") Addresses-Coverity-ID: 1470250 ("Unused value") Addresses-Coverity-ID: 1470251 ("Unused value") Fixes: 627448e85c76 ("tpm: separate cmd_ready/go_idle from runtime_pm") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/char/tpm/tpm-interface.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 129f640..8062736 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -512,7 +512,6 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, if (chip->ops->req_canceled(chip, status)) { dev_err(&chip->dev, "Operation Canceled\n"); - rc = -ECANCELED; goto out; } @@ -522,7 +521,6 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, chip->ops->cancel(chip); dev_err(&chip->dev, "Operation Timed out\n"); - rc = -ETIME; goto out; out_recv: @@ -533,14 +531,12 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, "tpm_transmit: tpm_recv: error %d\n", rc); goto out; } else if (len < TPM_HEADER_SIZE) { - rc = -EFAULT; goto out; } - if (len != be32_to_cpu(header->length)) { - rc = -EFAULT; + if (len != be32_to_cpu(header->length)) goto out; - } + rc = tpm2_commit_space(chip, space, ordinal, buf, &len); if (rc) -- 2.7.4
| |