linux-kernel - [PATCH v3 0/7] tpm_tis: Clean up force module parameter

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Date:	Thu, 17 Dec 2015 11:23:13 -0700
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Cc:	Martin Wilck <Martin.Wilck@...fujitsu.com>,
	Peter Huewe <peterhuewe@....de>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: [PATCH v3 0/7] tpm_tis: Clean up force module parameter

Drive the force=1 flow through the driver core. There are two main reasons to do this:
 1) To enable tpm_tis for OF environments requires a platform_device anyhow, so
    the force_device needs to be re-used for them.
 2) Recent changes in the core code break the assumption that a driver will be
    'attached' to things created through platform_device_register_simple,
    which causes the tpm core to blow up.

To make force probing reliable this also fixes both tpm_tis and tpm_crb to
properly use request_region to lock the TPM iomemory against multiple access.

v3:
- Fix some bugs in getting the struct resource for tpm_tis (Martin Wilck)
- Include tpm_crb in the request_resource cleanup as well, tpm_tis and tpm_crb
  tend to use the same address ranges so both should have locking for safety
- ACPI and endianness cleanups in both drivers

v2:
 - Make sure we request the mem resource in tpm_tis to avoid double-loading
   the driver
 - Re-order the init sequence so that a forced platform device gets first crack at
   loading, and excludes the other mechanisms via the above
 - Checkpatch clean
 - Gotos renamed

Jason Gunthorpe (7):
  tpm_crb: Use the common ACPI definition of struct acpi_tpm2
  tpm_tis: Disable interrupt auto probing on a per-device basis
  tpm_tis: Do not fall back to a hardcoded address for TPM2
  tpm_tis: Use devm_ioremap_resource
  tpm_tis: Clean up the force=1 module parameter
  tpm_crb: Drop le32_to_cpu(ioread32(..))
  tpm_crb: Use devm_ioremap_resource

 drivers/char/tpm/tpm.h     |   7 --
 drivers/char/tpm/tpm_crb.c | 196 +++++++++++++++++++++-------------
 drivers/char/tpm/tpm_tis.c | 254 +++++++++++++++++++++++++--------------------
 3 files changed, 264 insertions(+), 193 deletions(-)

-- 
2.1.4

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