diff options
| author | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2016-04-18 13:26:14 -0400 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-06-25 17:26:35 +0300 |
| commit | 2f9f53776dcd8ca3cc3d357d516ed76c3f038637 (patch) | |
| tree | bcd27c6396a0c7e7efe38aa407afb0548b43f1c1 /drivers/char/tpm | |
| parent | 062807f20e3f363dc5db0c7927bb6223dd1f46a2 (diff) | |
tpm: Introduce TPM_CHIP_FLAG_VIRTUAL
Introduce TPM_CHIP_FLAG_VIRTUAL to be used when the chip device has no
parent device.
Prevent sysfs entries requiring a parent device from being created.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-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>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm-chip.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 1 |
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 57d9794dac94..1965dc780688 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -181,6 +181,9 @@ struct tpm_chip *tpm_chip_alloc(struct device *dev, if (rc) goto out; + if (!dev) + chip->flags |= TPM_CHIP_FLAG_VIRTUAL; + cdev_init(&chip->cdev, &tpm_fops); chip->cdev.owner = THIS_MODULE; chip->cdev.kobj.parent = &chip->dev.kobj; @@ -298,7 +301,7 @@ static void tpm_del_legacy_sysfs(struct tpm_chip *chip) { struct attribute **i; - if (chip->flags & TPM_CHIP_FLAG_TPM2) + if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL)) return; sysfs_remove_link(&chip->dev.parent->kobj, "ppi"); @@ -316,7 +319,7 @@ static int tpm_add_legacy_sysfs(struct tpm_chip *chip) struct attribute **i; int rc; - if (chip->flags & TPM_CHIP_FLAG_TPM2) + if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL)) return 0; rc = __compat_only_sysfs_link_entry_to_kobj( diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 508e8e00c9c1..ff4e53cde70e 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -138,6 +138,7 @@ enum tpm_chip_flags { TPM_CHIP_FLAG_REGISTERED = BIT(0), TPM_CHIP_FLAG_TPM2 = BIT(1), TPM_CHIP_FLAG_IRQ = BIT(2), + TPM_CHIP_FLAG_VIRTUAL = BIT(3), }; struct tpm_chip { |