The following changes since commit 722658cac48a6ba49f5506fd74d010ad9dbb2f05:
keys/trusted_keys: reuse TPM version in option handling (2026-10-20 18:15:40
+0300)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
tags/tpm-v7.4-rc1
for you to fetch changes up to 836952696d0260cca1de6d3300cd8fcd5687fe67:
tpm: reject duplicate PCR banks in tpm2_get_pcr_allocation (2026-10-21
13:20:58 +0300)
----------------------------------------------------------------
tpm: changes for v7.4-rc1
FEATURES AND IMPROVEMENTS
=========================
- tpm_crb behaviour was improved by putting the chip into an idle state for
each transmission. This improves firmware behavior as the kernel now
better cancels its state as if it had never touched it in the first
place.
- One spurious (but harmless) wmb() was dropped from tpm_pm_resume().
- tpm_tis_i2c now requests the optional reset control and deasserts it
before communicating with the TPM.
- SIMPLE_DEV_PM_OPS was replaced with DEFINE_SIMPLE_DEV_PM_OPS across the
whole driver stack.
BUGS
====
- tpm2_probe() misinterpreted a transport error on TPM2_GetCapability
as the chip not being probed, and the chip was detected as a TPM 1 chip.
This can happen in reality only in the extremely rare case of bus
corruption. Despite the odds, a fix was landed, as it is still
technically a legit bug fix.
- It is not really worth the time and energy to go into details as tpm_nsc
is a somewhat legacy driver, but one null pointer dereference bug and
another causing use-after-free were fixed.
- read() of /dev/tpm{,rm}0 with zero size caused a pending response to be
consumed. This was fixed simply by an immediate return.
Signed-off-by: Jarkko Sakkinen <[email protected]>
----------------------------------------------------------------
Alexander Sverdlin (1):
tpm: tpm2_probe: propagate transport errors
Li Jun (2):
char: tpm: Use SIMPLE_DEV_PM_OPS for ibmvtpm power management
tpm: use DEFINE_SIMPLE_DEV_PM_OPS and pm_sleep_ptr()
Mario Limonciello (1):
tpm: Call cmd_ready/go_idle for each command transmission
Pei Xiao (3):
tpm: tpm_nsc: fix NULL pointer dereference on init failure
tpm: tpm_nsc: stop using the cleanup callback as dev.release
tpm: fix zero-length read discarding the pending response
Richard Lyu (1):
tpm: Remove ineffective wmb() from tpm_pm_resume()
Stefano Radaelli (1):
tpm: tis_i2c: Deassert optional reset line before probing
Yuqi Xu (1):
tpm: reject duplicate PCR banks in tpm2_get_pcr_allocation
drivers/char/tpm/tpm-chip.c | 24 ------------------------
drivers/char/tpm/tpm-dev-common.c | 3 +++
drivers/char/tpm/tpm-interface.c | 28 ++++++++++++++++++++++------
drivers/char/tpm/tpm2-cmd.c | 21 ++++++++++++++++++++-
drivers/char/tpm/tpm_atmel.c | 4 ++--
drivers/char/tpm/tpm_i2c_atmel.c | 4 ++--
drivers/char/tpm/tpm_i2c_infineon.c | 4 ++--
drivers/char/tpm/tpm_i2c_nuvoton.c | 4 ++--
drivers/char/tpm/tpm_ibmvtpm.c | 5 +----
drivers/char/tpm/tpm_infineon.c | 7 +++----
drivers/char/tpm/tpm_nsc.c | 12 ++++++++----
drivers/char/tpm/tpm_tis.c | 4 ++--
drivers/char/tpm/tpm_tis_core.h | 2 --
drivers/char/tpm/tpm_tis_i2c.c | 16 ++++++++++++++--
drivers/char/tpm/tpm_tis_i2c_cr50.c | 4 ++--
drivers/char/tpm/tpm_tis_spi_main.c | 4 ++--
drivers/char/tpm/tpm_tis_synquacer.c | 4 ++--
17 files changed, 87 insertions(+), 63 deletions(-)
