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path: root/drivers/char/tpm/tpm-chip.c
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Diffstat (limited to 'drivers/char/tpm/tpm-chip.c')
-rw-r--r--drivers/char/tpm/tpm-chip.c66
1 files changed, 42 insertions, 24 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index e096e9cddb40..283f00a7f036 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -170,6 +170,41 @@ static void tpm_dev_del_device(struct tpm_chip *chip)
device_unregister(&chip->dev);
}
+static int tpm1_chip_register(struct tpm_chip *chip)
+{
+ int rc;
+
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return 0;
+
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ return rc;
+
+ rc = tpm_add_ppi(chip);
+ if (rc) {
+ tpm_sysfs_del_device(chip);
+ return rc;
+ }
+
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+
+ return 0;
+}
+
+static void tpm1_chip_unregister(struct tpm_chip *chip)
+{
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return;
+
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+
+ tpm_remove_ppi(chip);
+
+ tpm_sysfs_del_device(chip);
+}
+
/*
* tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
@@ -185,22 +220,13 @@ int tpm_chip_register(struct tpm_chip *chip)
{
int rc;
- /* Populate sysfs for TPM1 devices. */
- if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
- rc = tpm_sysfs_add_device(chip);
- if (rc)
- goto del_misc;
-
- rc = tpm_add_ppi(chip);
- if (rc)
- goto del_sysfs;
-
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
- }
+ rc = tpm1_chip_register(chip);
+ if (rc)
+ return rc;
rc = tpm_dev_add_device(chip);
if (rc)
- return rc;
+ goto out_err;
/* Make the chip available. */
spin_lock(&driver_lock);
@@ -210,10 +236,8 @@ int tpm_chip_register(struct tpm_chip *chip)
chip->flags |= TPM_CHIP_FLAG_REGISTERED;
return 0;
-del_sysfs:
- tpm_sysfs_del_device(chip);
-del_misc:
- tpm_dev_del_device(chip);
+out_err:
+ tpm1_chip_unregister(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_chip_register);
@@ -238,13 +262,7 @@ void tpm_chip_unregister(struct tpm_chip *chip)
spin_unlock(&driver_lock);
synchronize_rcu();
- if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
- if (chip->bios_dir)
- tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(chip);
- tpm_sysfs_del_device(chip);
- }
-
+ tpm1_chip_unregister(chip);
tpm_dev_del_device(chip);
}
EXPORT_SYMBOL_GPL(tpm_chip_unregister);