tpm, tpm_tis: fix tpm_tis ACPI detection issue with TPM 2.0

Both for FIFO and CRB interface TCG has decided to use the same HID
MSFT0101. They can be differentiated by looking at the start method from
TPM2 ACPI table. This patches makes necessary fixes to tpm_tis and
tpm_crb modules in order to correctly detect, which module should be
used.

For MSFT0101 we must use struct acpi_driver because struct pnp_driver
has a 7 character limitation.

It turned out that the root cause in b371616b8 was not correct for
https://bugzilla.kernel.org/show_bug.cgi?id=98181.

v2:

* One fixup was missing from v1: is_tpm2_fifo -> is_fifo

v3:

* Use pnp_driver for existing HIDs and acpi_driver only for MSFT0101 in
  order ensure backwards compatibility.

v4:

* Check for FIFO before doing *anything* in crb_acpi_add().
* There was return immediately after acpi_bus_unregister_driver() in
  cleanup_tis(). This caused pnp_unregister_driver() not to be called.

Cc: [email protected]
Reported-by: Michael Saunders <[email protected]>
Reported-by: Michael Marley <[email protected]>
Reported-by: Jethro Beekman <[email protected]>
Reported-by: Matthew Garrett <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>
Tested-by: Michael Marley <[email protected]>
Tested-by: Mimi Zohar <[email protected]> (on TPM 1.2)
Reviewed-by: Peter Huewe <[email protected]>
Signed-off-by: Peter Huewe <[email protected]>

0 files changed, 0 insertions, 0 deletions