diff options
| -rw-r--r-- | drivers/char/tpm/tpm.c | 44 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 2 |
2 files changed, 29 insertions, 17 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index c88424a0c89b..a5d8bcb40000 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -1031,18 +1031,13 @@ void tpm_remove_hardware(struct device *dev) spin_unlock(&driver_lock); - dev_set_drvdata(dev, NULL); misc_deregister(&chip->vendor.miscdev); - kfree(chip->vendor.miscdev.name); sysfs_remove_group(&dev->kobj, chip->vendor.attr_group); tpm_bios_log_teardown(chip->bios_dir); - clear_bit(chip->dev_num, dev_mask); - - kfree(chip); - - put_device(dev); + /* write it this way to be explicit (chip->dev == dev) */ + put_device(chip->dev); } EXPORT_SYMBOL_GPL(tpm_remove_hardware); @@ -1083,6 +1078,26 @@ int tpm_pm_resume(struct device *dev) EXPORT_SYMBOL_GPL(tpm_pm_resume); /* + * Once all references to platform device are down to 0, + * release all allocated structures. + * In case vendor provided release function, + * call it too. + */ +static void tpm_dev_release(struct device *dev) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + + if (chip->vendor.release) + chip->vendor.release(dev); + + chip->release(dev); + + clear_bit(chip->dev_num, dev_mask); + kfree(chip->vendor.miscdev.name); + kfree(chip); +} + +/* * Called from tpm_<specific>.c probe function only for devices * the driver has determined it should claim. Prior to calling * this function the specific probe function has called pci_enable_device @@ -1136,23 +1151,21 @@ struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vend chip->vendor.miscdev.parent = dev; chip->dev = get_device(dev); + chip->release = dev->release; + dev->release = tpm_dev_release; + dev_set_drvdata(dev, chip); if (misc_register(&chip->vendor.miscdev)) { dev_err(chip->dev, "unable to misc_register %s, minor %d\n", chip->vendor.miscdev.name, chip->vendor.miscdev.minor); - put_device(dev); - clear_bit(chip->dev_num, dev_mask); - kfree(chip); - kfree(devname); + put_device(chip->dev); return NULL; } spin_lock(&driver_lock); - dev_set_drvdata(dev, chip); - list_add(&chip->list, &tpm_chip_list); spin_unlock(&driver_lock); @@ -1160,10 +1173,7 @@ struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vend if (sysfs_create_group(&dev->kobj, chip->vendor.attr_group)) { list_del(&chip->list); misc_deregister(&chip->vendor.miscdev); - put_device(dev); - clear_bit(chip->dev_num, dev_mask); - kfree(chip); - kfree(devname); + put_device(chip->dev); return NULL; } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index d15ccddc92eb..e885148b4cfb 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -74,6 +74,7 @@ struct tpm_vendor_specific { int (*send) (struct tpm_chip *, u8 *, size_t); void (*cancel) (struct tpm_chip *); u8 (*status) (struct tpm_chip *); + void (*release) (struct device *); struct miscdevice miscdev; struct attribute_group *attr_group; struct list_head list; @@ -106,6 +107,7 @@ struct tpm_chip { struct dentry **bios_dir; struct list_head list; + void (*release) (struct device *); }; #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |