diff options
Diffstat (limited to 'drivers/char/tpm/tpm_acpi.c')
| -rw-r--r-- | drivers/char/tpm/tpm_acpi.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c index 0cb43ef5f79a..b7718c95fd0b 100644 --- a/drivers/char/tpm/tpm_acpi.c +++ b/drivers/char/tpm/tpm_acpi.c @@ -56,12 +56,18 @@ int tpm_read_log_acpi(struct tpm_chip *chip) log = &chip->log; + /* Unfortuntely ACPI does not associate the event log with a specific + * TPM, like PPI. Thus all ACPI TPMs will read the same log. + */ + if (!chip->acpi_dev_handle) + return -ENODEV; + /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */ status = acpi_get_table(ACPI_SIG_TCPA, 1, (struct acpi_table_header **)&buff); if (ACPI_FAILURE(status)) - return -EIO; + return -ENODEV; switch(buff->platform_class) { case BIOS_SERVER: |