| Message ID | 1460728216-19563-3-git-send-email-stefanb@linux.vnet.ibm.com |
|---|---|
| State | New |
| Headers | show |
On Fri, Apr 15, 2016 at 09:50:13AM -0400, Stefan Berger wrote: > 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> > drivers/char/tpm/tpm-chip.c | 7 +++++-- > drivers/char/tpm/tpm.h | 1 + > 2 files changed, 6 insertions(+), 2 deletions(-) Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Jason ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 7e2c9cf..a12db8e 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; @@ -297,7 +300,7 @@ 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"); @@ -315,7 +318,7 @@ 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 508e8e0..ff4e53c 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 {
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> --- drivers/char/tpm/tpm-chip.c | 7 +++++-- drivers/char/tpm/tpm.h | 1 + 2 files changed, 6 insertions(+), 2 deletions(-)