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| author |   Nayna Jain <nayna@linux.vnet.ibm.com> | 2017-10-17 16:32:32 -0400 |
|---|---|---|
| committer |   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-01-08 12:58:33 +0200 |
| commit | 5ef924d9e2e81e55c6aec056449a269409e15f21 (patch) | |
| tree | 77efe1a4d50e91a0f3bac78cdfad029efb73deed /drivers/char | |
| parent | tpm: reduce tpm polling delay in tpm_tis_core (diff) | |
| download | linux-dev-5ef924d9e2e81e55c6aec056449a269409e15f21.tar.xz linux-dev-5ef924d9e2e81e55c6aec056449a269409e15f21.zip | |
tpm: use tpm_msleep() value as max delay
Currently, tpm_msleep() uses delay_msec as the minimum value in
usleep_range. However, that is the maximum time we want to wait.
The function is modified to use the delay_msec as the maximum
value, not the minimum value.
After this change, performance on a TPM 1.2 with an 8 byte
burstcount for 1000 extends improved from ~9sec to ~8sec.
Fixes: 3b9af007869("tpm: replace msleep() with usleep_range() in TPM 1.2/
2.0 generic drivers")
Signed-off-by: Nayna Jain <nayna@linux.vnet.ibm.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 0c6c4fd8b137..9d768d2abd24 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -515,8 +515,8 @@ int tpm_pm_resume(struct device *dev); static inline void tpm_msleep(unsigned int delay_msec) { - usleep_range(delay_msec * 1000, - (delay_msec * 1000) + TPM_TIMEOUT_RANGE_US); + usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US, + delay_msec * 1000); }; struct tpm_chip *tpm_chip_find_get(int chip_num); |