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>
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index c50637d..afdc836 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -310,10 +310,12 @@
{
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)