From: Jerry Snitselaar <jsnitsel@redhat.com>
To: linux-integrity@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Subject: [PATCH 1/2] tpm: don't return bool from update_timeouts
Date: Wed, 30 Jan 2019 15:06:58 -0700 [thread overview]
Message-ID: <20190130220659.10102-1-jsnitsel@redhat.com> (raw)
Set tpm_chip->timeouts_adjusted directly in the update_timeouts
code instead of returning bool. In case of tpm read failing
print warning that the read failed and continue on.
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
---
drivers/char/tpm/tpm1-cmd.c | 3 +--
drivers/char/tpm/tpm_tis_core.c | 15 +++++++++------
include/linux/tpm.h | 2 +-
3 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index 6f306338953b..bda9a16b44f6 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -380,8 +380,7 @@ int tpm1_get_timeouts(struct tpm_chip *chip)
* of misreporting.
*/
if (chip->ops->update_timeouts)
- chip->timeout_adjusted =
- chip->ops->update_timeouts(chip, timeout_eff);
+ chip->ops->update_timeouts(chip, timeout_eff);
if (!chip->timeout_adjusted) {
/* Restore default if chip reported 0 */
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index bf7e49cfa643..45e29fd1f5d7 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -521,35 +521,38 @@ static const struct tis_vendor_timeout_override vendor_timeout_overrides[] = {
(TIS_SHORT_TIMEOUT*1000), (TIS_SHORT_TIMEOUT*1000) } },
};
-static bool tpm_tis_update_timeouts(struct tpm_chip *chip,
+static void tpm_tis_update_timeouts(struct tpm_chip *chip,
unsigned long *timeout_cap)
{
struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
int i, rc;
u32 did_vid;
+ chip->timeout_adjusted = false;
+
if (chip->ops->clk_enable != NULL)
chip->ops->clk_enable(chip, true);
rc = tpm_tis_read32(priv, TPM_DID_VID(0), &did_vid);
- if (rc < 0)
+ if (rc < 0) {
+ dev_warn(&chip->dev, "%s: failed to read did_vid: %d\n",
+ __func__, rc);
goto out;
+ }
for (i = 0; i != ARRAY_SIZE(vendor_timeout_overrides); i++) {
if (vendor_timeout_overrides[i].did_vid != did_vid)
continue;
memcpy(timeout_cap, vendor_timeout_overrides[i].timeout_us,
sizeof(vendor_timeout_overrides[i].timeout_us));
- rc = true;
+ chip->timeout_adjusted = true;
}
- rc = false;
-
out:
if (chip->ops->clk_enable != NULL)
chip->ops->clk_enable(chip, false);
- return rc;
+ return;
}
/*
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index b49a55cf775f..13563b8c0c3a 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -41,7 +41,7 @@ struct tpm_class_ops {
int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
void (*cancel) (struct tpm_chip *chip);
u8 (*status) (struct tpm_chip *chip);
- bool (*update_timeouts)(struct tpm_chip *chip,
+ void (*update_timeouts)(struct tpm_chip *chip,
unsigned long *timeout_cap);
int (*go_idle)(struct tpm_chip *chip);
int (*cmd_ready)(struct tpm_chip *chip);
--
2.20.1.98.gecbdaf0899
next reply other threads:[~2019-01-30 23:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-30 22:06 Jerry Snitselaar [this message]
2019-01-30 22:06 ` [PATCH 2/2] tpm: don't print error message in tpm_transmit_cmd when tpm still testing Jerry Snitselaar
2019-01-31 16:06 ` [PATCH 1/2] tpm: don't return bool from update_timeouts Jarkko Sakkinen
2019-01-31 16:07 ` Jarkko Sakkinen
2019-01-30 22:43 Jerry Snitselaar
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