linux-kernel - [PATCH] tpm: move TPM_CHIP_FLAG_HAVE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Wed, 13 Nov 2019 01:00:02 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     linux-integrity@...r.kernel.org
Cc:     Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: [PATCH] tpm: move TPM_CHIP_FLAG_HAVE_TIMEOUTS check

Since tpm1_get_timeouts and tpm2_get_timeouts are now called directly
by the auto startup code in addition to being called by
tpm_get_timeouts, push the flag check down into the individual
functions to avoid going through them again if they've already set the
TPM_CHIP_FLAG_HAVE_TIMEOUTS flag.

Cc: Peter Huewe <peterhuewe@....de>
Cc: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: linux-kernel@...r.kernel.org
Cc: stable@...r.kernel.org
Fixes: d4a317563207 ("tpm: move tpm 1.x selftest code from tpm-interface.c tpm1-cmd.c")
Fixes: 9db7fe187c54 ("tpm: factor out tpm_startup function")
Signed-off-by: Jerry Snitselaar <jsnitsel@...hat.com>
---
 drivers/char/tpm/tpm-interface.c | 3 ---
 drivers/char/tpm/tpm1-cmd.c      | 3 +++
 drivers/char/tpm/tpm2-cmd.c      | 3 +++
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index d7a3888ad80f..3c9e14981ce6 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -237,9 +237,6 @@ EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
 
 int tpm_get_timeouts(struct tpm_chip *chip)
 {
-	if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
-		return 0;
-
 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
 		return tpm2_get_timeouts(chip);
 	else
diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c
index 149e953ca369..5330b32d1469 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -345,6 +345,9 @@ int tpm1_get_timeouts(struct tpm_chip *chip)
 	unsigned long timeout_old[4], timeout_chip[4], timeout_eff[4];
 	ssize_t rc;
 
+	if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
+		return 0;
+
 	rc = tpm1_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, NULL,
 			 sizeof(cap.timeout));
 	if (rc == TPM_ERR_INVALID_POSTINIT) {
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index ba9acae83bff..55d96be86ed8 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -38,6 +38,9 @@ static struct tpm2_hash tpm2_hash_map[] = {
 
 int tpm2_get_timeouts(struct tpm_chip *chip)
 {
+	if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
+		return 0;
+
 	/* Fixed timeouts for TPM2 */
 	chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
 	chip->timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);
-- 
2.24.0