diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2018-10-16 16:37:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-09 17:14:52 +0100 |
| commit | cb2520535f6de543038a909746bee607e2138164 (patch) | |
| tree | 12611e924b4360b8b8c5c770aacc60e6984d3b81 | |
| parent | 3f23e65d32b7029bf83e3e9a853b7d37c25c2551 (diff) | |
| download | linux-rpi-cb2520535f6de543038a909746bee607e2138164.tar.gz linux-rpi-cb2520535f6de543038a909746bee607e2138164.tar.bz2 linux-rpi-cb2520535f6de543038a909746bee607e2138164.zip | |
tpm: tpm_try_transmit() refactor error flow.
commit 01f54664a4db0d612de0ece8e0022f21f9374e9b upstream.
First, rename out_no_locality to out_locality for bailing out on
both tpm_cmd_ready() and tpm_request_locality() failure.
Second, ignore the return value of go_to_idle() as it may override
the return value of the actual tpm operation, the go_to_idle() error
will be caught on any consequent command.
Last, fix the wrong 'goto out', that jumped back instead of forward.
Cc: stable@vger.kernel.org
Fixes: 627448e85c76 ("tpm: separate cmd_ready/go_idle from runtime_pm")
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 6e93df272c20..038b91bcbd31 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -479,13 +479,15 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, if (need_locality) { rc = tpm_request_locality(chip, flags); - if (rc < 0) - goto out_no_locality; + if (rc < 0) { + need_locality = false; + goto out_locality; + } } rc = tpm_cmd_ready(chip, flags); if (rc) - goto out; + goto out_locality; rc = tpm2_prepare_space(chip, space, ordinal, buf); if (rc) @@ -549,14 +551,13 @@ out_recv: dev_err(&chip->dev, "tpm2_commit_space: error %d\n", rc); out: - rc = tpm_go_idle(chip, flags); - if (rc) - goto out; + /* may fail but do not override previous error value in rc */ + tpm_go_idle(chip, flags); +out_locality: if (need_locality) tpm_relinquish_locality(chip, flags); -out_no_locality: if (chip->ops->clk_enable != NULL) chip->ops->clk_enable(chip, false); |