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 <kjh...@us.ibm.com>
Reported-by: Ferry Toth: <ferry.t...@elsinga.info>
Signed-off-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
---
drivers/char/tpm/tpm2-space.c | 14 ++++++++++----
drivers/char/tpm/tpm_tis.c | 1 -
include/linux/tpm.h | 6 ++++--
3 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index 982d341d8837..c9817930eb23 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -47,9 +47,13 @@ int tpm2_init_space(struct tpm_space *space)
space->session_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (space->session_buf == NULL) {
kfree(space->context_buf);
+ space->context_buf = NULL;
return -ENOMEM;
}
+ space->context_size = PAGE_SIZE;
+ space->session_size = PAGE_SIZE;
+
return 0;
}
@@ -311,8 +315,10 @@ int tpm2_prepare_space(struct tpm_chip *chip, struct
tpm_space *space, u8 *cmd,
sizeof(space->context_tbl));
memcpy(&chip->work_space.session_tbl, &space->session_tbl,
sizeof(space->session_tbl));
- memcpy(chip->work_space.context_buf, space->context_buf, PAGE_SIZE);
- memcpy(chip->work_space.session_buf, space->session_buf, PAGE_SIZE);
+ memcpy(chip->work_space.context_buf, space->context_buf,
+ space->context_size);
+ memcpy(chip->work_space.session_buf, space->session_buf,
+ space->session_size);
rc = tpm2_load_space(chip);
if (rc) {
@@ -492,7 +498,7 @@ static int tpm2_save_space(struct tpm_chip *chip)
continue;
rc = tpm2_save_context(chip, space->context_tbl[i],
- space->context_buf, PAGE_SIZE,
+ space->context_buf, space->context_size,
&offset);
if (rc == -ENOENT) {
space->context_tbl[i] = 0;
@@ -509,7 +515,7 @@ static int tpm2_save_space(struct tpm_chip *chip)
continue;
rc = tpm2_save_context(chip, space->session_tbl[i],
- space->session_buf, PAGE_SIZE,
+ space->session_buf, space->session_size,
&offset);
if (rc == -ENOENT) {
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 */
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 03e9b184411b..9ea39e8f7162 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -92,10 +92,12 @@ enum tpm_duration {
#define TPM_PPI_VERSION_LEN 3
struct tpm_space {
+ u8 *context_buf;
+ u8 *session_buf;
+ u32 context_size;
+ u32 session_size;
u32 context_tbl[3];
- u8 *context_buf;
u32 session_tbl[3];
- u8 *session_buf;
};
struct tpm_bios_log {
--
2.25.1
