the following patch was just integrated into master: commit 85a255fbd89aba7edea7ac1d09c39099d53f7c44 Author: Tobias Diedrich ranma+coreboot@tdiedrich.de Date: Mon Feb 15 13:13:58 2016 +0100
acpi/tpm: Gracefully handle missing TPM module.
When TPM support is enabled, verify the TPM_DID_VID field is not all zeroes or all ones before returning 0xf in the _STA method.
This avoids these kernel errors when no module is installed: [ 3.426426] tpm_tis 00:01: tpm_transmit: tpm_send: error -5 [ 3.432049] tpm_tis: probe of 00:01 failed with error -5
Change-Id: Ia089d4232e0986b3bc635d346e68d982e8aecd44 Signed-off-by: Tobias Diedrich ranma+coreboot@tdiedrich.de Reviewed-on: https://review.coreboot.org/13713 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel paulepanter@users.sourceforge.net Reviewed-by: Duncan Laurie dlaurie@google.com
See https://review.coreboot.org/13713 for details.
-gerrit