tpm: fix the rollback in tpm_chip_register()

Fixed the rollback and gave more self-documenting names for the
functions.

Fixes: d972b0523f ("tpm: fix call order in tpm-chip.c")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
cc: stable@vger.kernel.org
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 45cc39a..1a9dcee 100644 (file)
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -140,7 +140,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
 
-static int tpm_dev_add_device(struct tpm_chip *chip)
+static int tpm_add_char_device(struct tpm_chip *chip)
 {
        int rc;
 
@@ -151,7 +151,6 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
                        chip->devname, MAJOR(chip->dev.devt),
                        MINOR(chip->dev.devt), rc);
 
-               device_unregister(&chip->dev);
                return rc;
        }
 
@@ -162,13 +161,14 @@ static int tpm_dev_add_device(struct tpm_chip *chip)
                        chip->devname, MAJOR(chip->dev.devt),
                        MINOR(chip->dev.devt), rc);
 
+               cdev_del(&chip->cdev);
                return rc;
        }
 
        return rc;
 }
 
-static void tpm_dev_del_device(struct tpm_chip *chip)
+static void tpm_del_char_device(struct tpm_chip *chip)
 {
        cdev_del(&chip->cdev);
        device_unregister(&chip->dev);
@@ -222,7 +222,7 @@ int tpm_chip_register(struct tpm_chip *chip)
 
        tpm_add_ppi(chip);
 
-       rc = tpm_dev_add_device(chip);
+       rc = tpm_add_char_device(chip);
        if (rc)
                goto out_err;
 
@@ -274,6 +274,6 @@ void tpm_chip_unregister(struct tpm_chip *chip)
                sysfs_remove_link(&chip->pdev->kobj, "ppi");
 
        tpm1_chip_unregister(chip);
-       tpm_dev_del_device(chip);
+       tpm_del_char_device(chip);
 }
 EXPORT_SYMBOL_GPL(tpm_chip_unregister);