linux-kernel - [PATCH 0/4] Fixes for TPM interrupt handling

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Message-Id: <1613955394-13152-1-git-send-email-LinoSanfilippo@gmx.de>
Date:   Mon, 22 Feb 2021 01:56:30 +0100
From:   Lino Sanfilippo <LinoSanfilippo@....de>
To:     peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca
Cc:     stefanb@...ux.vnet.ibm.com, James.Bottomley@...senpartnership.com,
        jsnitsel@...hat.com, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org, LinoSanfilippo@....de
Subject: [PATCH 0/4] Fixes for TPM interrupt handling

This series fixes issues around the TPM driver interrupt handling. These
issues prevent TPM chips like the SLB 9670 to work over SPI. 

PATCH 1: The SPI implementation of the functions to read/write to/from
registers uses mutexes and thus require a sleepable context. For this
reason request a threaded interrupt handler.

PATCH 2: Simplify locality handling by taking the driver locality (0) at
driver startup and releasing it at driver shutdown. This also fixes a
warning at driver startup that is caused by a register access without prior
locality request.

PATCH 3: Fix and simplify the test for working interrupts.

PATCH 4: Only set the interrupts which are reported as being available.

With these patches applied the SLB 9670 works as expected: interrupts are
detected and the transmit/receive operations are controlled by interrupt
handling.

The patches are based on Linux mainline V5.11

Lino Sanfilippo (4):
  tpm: Use a threaded interrupt handler
  tpm: get locality before writing to TPM chip
  tpm: Fix test for interrupts
  tpm: Only enable supported irqs

 drivers/char/tpm/tpm-chip.c     |  10 ----
 drivers/char/tpm/tpm_tis_core.c | 127 +++++++++++++++++++---------------------
 drivers/char/tpm/tpm_tis_core.h |   2 +-
 include/linux/tpm.h             |   2 +-
 4 files changed, 62 insertions(+), 79 deletions(-)

-- 
2.7.4