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| author | Martin Wilck <Martin.Wilck@ts.fujitsu.com> | 2015-11-20 14:32:33 +0100 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2015-12-02 19:57:21 +0200 |
| commit | f728643001397cee39dcfabff6458a5fbc3baecf (patch) | |
| tree | 4c4f608b1fc03e0d7b789cfde0f3781fe7728735 /drivers/char | |
| parent | ebd68df3f24b318d391d15c458d6f43f340ba36a (diff) | |
| download | linux-f728643001397cee39dcfabff6458a5fbc3baecf.tar.gz linux-f728643001397cee39dcfabff6458a5fbc3baecf.tar.bz2 linux-f728643001397cee39dcfabff6458a5fbc3baecf.zip | |
tpm_tis: further simplify calculation of ordinal duration
commit 07b133e6060b ("char/tpm: simplify duration calculation and
eliminate smatch warning.") includes a misleading test that is always
false. The tpm_ordinal_duration table is only valid for TPM_PROTECTED
ordinals where the higher 16 bits are all 0, anyway.
Signed-off-by: Martin Wilck <Martin.Wilck@ts.fujitsu.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>
Acked-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index c50637db3a8a..afdc83602e9f 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -310,10 +310,12 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, { int duration_idx = TPM_UNDEFINED; int duration = 0; - u8 category = (ordinal >> 24) & 0xFF; - if ((category == TPM_PROTECTED_COMMAND && ordinal < TPM_MAX_ORDINAL) || - (category == TPM_CONNECTION_COMMAND && ordinal < TSC_MAX_ORDINAL)) + /* + * We only have a duration table for protected commands, where the upper + * 16 bits are 0. For the few other ordinals the fallback will be used. + */ + if (ordinal < TPM_MAX_ORDINAL) duration_idx = tpm_ordinal_duration[ordinal]; if (duration_idx != TPM_UNDEFINED) |