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From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     linux-integrity@vger.kernel.org
Cc:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        Kylene Jo Hall <kjhall@us.ibm.com>,
        "Ferry Toth :" <ferry.toth@elsinga.info>,
        Peter Huewe <peterhuewe@gmx.de>,
        Jason Gunthorpe <jgg@ziepe.ca>, Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@osdl.org>,
        linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v2] tpm_tis: Remove the HID IFX0102
Date:   Thu, 25 Jun 2020 05:31:11 +0300
Message-Id: <20200625023111.270458-1-jarkko.sakkinen@linux.intel.com>
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Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Acer C720 running Linux v5.3 reports this in klog:

tpm_tis: 1.2 TPM (device-id 0xB, rev-id 16)
tpm tpm0: tpm_try_transmit: send(): error -5
tpm tpm0: A TPM error (-5) occurred attempting to determine the timeouts
tpm_tis tpm_tis: Could not get TPM timeouts and durations
tpm_tis 00:08: 1.2 TPM (device-id 0xB, rev-id 16)
tpm tpm0: tpm_try_transmit: send(): error -5
tpm tpm0: A TPM error (-5) occurred attempting to determine the timeouts
tpm_tis 00:08: Could not get TPM timeouts and durations
ima: No TPM chip found, activating TPM-bypass!
tpm_inf_pnp 00:08: Found TPM with ID IFX0102

% git --no-pager grep IFX0102 drivers/char/tpm
drivers/char/tpm/tpm_infineon.c:	{"IFX0102", 0},
drivers/char/tpm/tpm_tis.c:	{"IFX0102", 0},		/* Infineon */

Obviously IFX0102 was added to the HID table for the TCG TIS driver by
mistake.

Fixes: 93e1b7d42e1e ("[PATCH] tpm: add HID module parameter")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203877
Cc: Kylene Jo Hall <kjhall@us.ibm.com>
Reported-by: Ferry Toth: <ferry.toth@elsinga.info>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
v2:
git diff -R HEAD~1 -- drivers/char/tpm/tpm2-space.c  | patch -p1
git diff -R HEAD~1 -- include/linux/tpm.h  | patch -p1
 drivers/char/tpm/tpm_tis.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index e7df342a317d..c58ea10fc92f 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -238,7 +238,6 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
 static struct pnp_device_id tpm_pnp_tbl[] = {
 	{"PNP0C31", 0},		/* TPM */
 	{"ATM1200", 0},		/* Atmel */
-	{"IFX0102", 0},		/* Infineon */
 	{"BCM0101", 0},		/* Broadcom */
 	{"BCM0102", 0},		/* Broadcom */
 	{"NSC1200", 0},		/* National */
-- 
2.25.1