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From:   Jerry Snitselaar <jsnitsel@redhat.com>
To:     linux-integrity@vger.kernel.org
Cc:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        Peter Huewe <peterhuewe@gmx.de>,
        Jason Gunthorpe <jgg@ziepe.ca>, linux-kernel@vger.kernel.org,
        linux-stable@vger.kernel.org,
        Christian Bundy <christianbundy@fraction.io>
Subject: [PATCH] tpm_tis: turn on TPM before calling tpm_get_timeouts
Date:   Mon, 11 Nov 2019 16:34:18 -0700
Message-Id: <20191111233418.17676-1-jsnitsel@redhat.com>
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Sender: linux-kernel-owner@vger.kernel.org
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With power gating moved out of the tpm_transmit code we need
to power on the TPM prior to calling tpm_get_timeouts.

Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: Peter Huewe <peterhuewe@gmx.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-kernel@vger.kernel.org
Cc: linux-stable@vger.kernel.org
Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()=
")
Reported-by: Christian Bundy <christianbundy@fraction.io>
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
---
 drivers/char/tpm/tpm_tis_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_cor=
e.c
index 270f43acbb77..cb101cec8f8b 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -974,13 +974,14 @@ int tpm_tis_core_init(struct device *dev, struct tpm_=
tis_data *priv, int irq,
 =09=09 * to make sure it works. May as well use that command to set the
 =09=09 * proper timeouts for the driver.
 =09=09 */
+=09=09tpm_chip_start(chip);
 =09=09if (tpm_get_timeouts(chip)) {
 =09=09=09dev_err(dev, "Could not get TPM timeouts and durations\n");
 =09=09=09rc =3D -ENODEV;
+=09=09=09tpm_stop_chip(chip);
 =09=09=09goto out_err;
 =09=09}
=20
-=09=09tpm_chip_start(chip);
 =09=09chip->flags |=3D TPM_CHIP_FLAG_IRQ;
 =09=09if (irq) {
 =09=09=09tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
--=20
2.24.0