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| author | Stefan Mahnke-Hartmann <stefan.mahnke-hartmann@infineon.com> | 2022-05-13 15:41:53 +0200 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2022-05-23 18:47:50 +0300 |
| commit | af402ee3c045b0cbd10b7e66d2431304ac9e69bb (patch) | |
| tree | ce57a42d24ae8695f6d94e1596e70cc34fec6235 /drivers/char | |
| parent | e57b2523bd37e6434f4e64c7a685e3715ad21e9a (diff) | |
| download | lwn-af402ee3c045b0cbd10b7e66d2431304ac9e69bb.tar.gz lwn-af402ee3c045b0cbd10b7e66d2431304ac9e69bb.zip | |
tpm: Add field upgrade mode support for Infineon TPM2 modules
TPM2_GetCapability with a capability that has the property type value
of TPM_PT_TOTAL_COMMANDS returns a zero length list, when an Infineon
TPM2 is in field upgrade mode.
Since an Infineon TPM2.0 in field upgrade mode returns RC_SUCCESS on
TPM2_Startup, the field upgrade mode has to be detected by
TPM2_GetCapability.
Signed-off-by: Stefan Mahnke-Hartmann <stefan.mahnke-hartmann@infineon.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm2-cmd.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 04a3e23a4afc..c1eb5d223839 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -754,7 +754,11 @@ int tpm2_auto_startup(struct tpm_chip *chip) rc = tpm2_get_cc_attrs_tbl(chip); out: - if (rc == TPM2_RC_UPGRADE) { + /* + * Infineon TPM in field upgrade mode will return no data for the number + * of supported commands. + */ + if (rc == TPM2_RC_UPGRADE || rc == -ENODATA) { dev_info(&chip->dev, "TPM in field upgrade mode, requires firmware upgrade\n"); chip->flags |= TPM_CHIP_FLAG_FIRMWARE_UPGRADE; rc = 0; |