tpm: Fix handling of missing event log

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The event log is an optional firmware feature, if the firmware
does not support it then the securityfs files should not be created
and no other notification given.

- Uniformly return -ENODEV from the tpm_bios_log_setup cone if
  no event log is detected.
- Check in ACPI if this node was discovered via ACPI.
- Improve the check in OF to make sure there is a parent and to
  fail detection if the two log properties are not declared
- Pass through all other error codes instead of filtering just some

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

...

This commit is contained in:

Jason Gunthorpe 2016-11-19 11:18:28 -07:00 • committed by Jarkko Sakkinen

parent 005451d44a

commit 0cf577a03f

4 changed files with 26 additions and 21 deletions

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2

drivers/char/tpm/tpm-chip.c

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8

drivers/char/tpm/tpm_acpi.c

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26

drivers/char/tpm/tpm_eventlog.c

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11

drivers/char/tpm/tpm_of.c

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