Messages in this thread Patch in this message | | | From | Stefan Berger <> | Subject | [PATCH v7 07/10] tpm: Introduce TPM_CHIP_FLAG_VIRTUAL | Date | Fri, 11 Mar 2016 21:51:02 -0500 |
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Introduce TPM_CHIP_FLAG_VIRTUAL to be used when the chip device has no parent device. Also adapt tpm_chip_alloc so that it can be called with parent device being NULL.
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> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> --- drivers/char/tpm/tpm-chip.c | 9 +++++---- drivers/char/tpm/tpm-sysfs.c | 15 +++++++++++---- drivers/char/tpm/tpm.h | 5 +++-- 3 files changed, 19 insertions(+), 10 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index f62c851..e4e1fad 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -170,9 +170,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *dev, chip->dev.class = tpm_class; chip->dev.release = tpm_dev_release; chip->dev.parent = dev; -#ifdef CONFIG_ACPI chip->dev.groups = chip->groups; -#endif if (chip->dev_num == 0) chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR); @@ -183,6 +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; @@ -327,7 +328,7 @@ int tpm_chip_register(struct tpm_chip *chip) chip->flags |= TPM_CHIP_FLAG_REGISTERED; - if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) { + if (!(chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))) { rc = __compat_only_sysfs_link_entry_to_kobj( &chip->dev.parent->kobj, &chip->dev.kobj, "ppi"); if (rc && rc != -ENOENT) { @@ -361,7 +362,7 @@ void tpm_chip_unregister(struct tpm_chip *chip) if (!(chip->flags & TPM_CHIP_FLAG_REGISTERED)) return; - if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) + if (!(chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))) sysfs_remove_link(&chip->dev.parent->kobj, "ppi"); tpm1_chip_unregister(chip); diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 34e7fc7..9ee0f4d 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -283,9 +283,15 @@ static const struct attribute_group tpm_dev_group = { int tpm_sysfs_add_device(struct tpm_chip *chip) { - int err; - err = sysfs_create_group(&chip->dev.parent->kobj, - &tpm_dev_group); + int err = 0; + + if (!(chip->flags & TPM_CHIP_FLAG_VIRTUAL)) + err = sysfs_create_group(&chip->dev.parent->kobj, + &tpm_dev_group); + else { + dev_set_drvdata(&chip->dev, chip); + chip->groups[chip->groups_cnt++] = &tpm_dev_group; + } if (err) dev_err(&chip->dev, @@ -300,5 +306,6 @@ void tpm_sysfs_del_device(struct tpm_chip *chip) * synchronizes this removal so that no callbacks are running or can * run again */ - sysfs_remove_group(&chip->dev.parent->kobj, &tpm_dev_group); + if (!(chip->flags & TPM_CHIP_FLAG_VIRTUAL)) + sysfs_remove_group(&chip->dev.parent->kobj, &tpm_dev_group); } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 928b47f..f197eef 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -164,6 +164,7 @@ struct tpm_vendor_specific { enum tpm_chip_flags { TPM_CHIP_FLAG_REGISTERED = BIT(0), TPM_CHIP_FLAG_TPM2 = BIT(1), + TPM_CHIP_FLAG_VIRTUAL = BIT(2), }; struct tpm_chip { @@ -189,9 +190,9 @@ struct tpm_chip { struct dentry **bios_dir; -#ifdef CONFIG_ACPI - const struct attribute_group *groups[2]; + const struct attribute_group *groups[3]; unsigned int groups_cnt; +#ifdef CONFIG_ACPI acpi_handle acpi_dev_handle; char ppi_version[TPM_PPI_VERSION_LEN + 1]; #endif /* CONFIG_ACPI */ -- 2.4.3
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