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Diffstat (limited to 'drivers/char/tpm/tpm.c')
-rw-r--r--drivers/char/tpm/tpm.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index aebb4b5a199c..277cf22609ca 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -583,17 +583,22 @@ duration:
duration_cap = &tpm_cmd.params.getcap_out.cap.duration;
chip->vendor.duration[TPM_SHORT] =
usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_short));
+ chip->vendor.duration[TPM_MEDIUM] =
+ usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_medium));
+ chip->vendor.duration[TPM_LONG] =
+ usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_long));
+
/* The Broadcom BCM0102 chipset in a Dell Latitude D820 gets the above
* value wrong and apparently reports msecs rather than usecs. So we
* fix up the resulting too-small TPM_SHORT value to make things work.
+ * We also scale the TPM_MEDIUM and -_LONG values by 1000.
*/
- if (chip->vendor.duration[TPM_SHORT] < (HZ/100))
+ if (chip->vendor.duration[TPM_SHORT] < (HZ / 100)) {
chip->vendor.duration[TPM_SHORT] = HZ;
-
- chip->vendor.duration[TPM_MEDIUM] =
- usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_medium));
- chip->vendor.duration[TPM_LONG] =
- usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_long));
+ chip->vendor.duration[TPM_MEDIUM] *= 1000;
+ chip->vendor.duration[TPM_LONG] *= 1000;
+ dev_info(chip->dev, "Adjusting TPM timeout parameters.");
+ }
}
EXPORT_SYMBOL_GPL(tpm_get_timeouts);