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| author | Mårten Lindahl <marten.lindahl@axis.com> | 2022-08-01 16:57:03 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2022-08-03 23:56:20 +0300 |
| commit | 863ed94c589fcd1984f4e3080f069d30508044bb (patch) | |
| tree | 121a6e3ad83c86f6287ee3b50494c6845ece74b0 /drivers/char/tpm | |
| parent | bed4593645366ad7362a3aa7bc0d100d8d8236a8 (diff) | |
| download | linux-863ed94c589fcd1984f4e3080f069d30508044bb.tar.xz | |
tpm: Add check for Failure mode for TPM2 modules
In commit 0aa698787aa2 ("tpm: Add Upgrade/Reduced mode support for
TPM2 modules") it was said that:
"If the TPM is in Failure mode, it will successfully respond to both
tpm2_do_selftest() and tpm2_startup() calls. Although, will fail to
answer to tpm2_get_cc_attrs_tbl(). Use this fact to conclude that TPM
is in Failure mode."
But a check was never added in the commit when calling
tpm2_get_cc_attrs_tbl() to conclude that the TPM is in Failure mode.
This commit corrects this by adding a check.
Fixes: 0aa698787aa2 ("tpm: Add Upgrade/Reduced mode support for TPM2 modules")
Cc: stable@vger.kernel.org # v5.17+
Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm2-cmd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index c1eb5d223839..65d03867e114 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -752,6 +752,12 @@ int tpm2_auto_startup(struct tpm_chip *chip) } rc = tpm2_get_cc_attrs_tbl(chip); + if (rc == TPM2_RC_FAILURE || (rc < 0 && rc != -ENOMEM)) { + dev_info(&chip->dev, + "TPM in field failure mode, requires firmware upgrade\n"); + chip->flags |= TPM_CHIP_FLAG_FIRMWARE_UPGRADE; + rc = 0; + } out: /* |