diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/keyslot-manager.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/block/keyslot-manager.c b/block/keyslot-manager.c index 86f8195d8039..324bf4244f5f 100644 --- a/block/keyslot-manager.c +++ b/block/keyslot-manager.c @@ -29,6 +29,7 @@ #define pr_fmt(fmt) "blk-crypto: " fmt #include <linux/keyslot-manager.h> +#include <linux/device.h> #include <linux/atomic.h> #include <linux/mutex.h> #include <linux/pm_runtime.h> @@ -127,6 +128,34 @@ err_destroy_ksm: } EXPORT_SYMBOL_GPL(blk_ksm_init); +static void blk_ksm_destroy_callback(void *ksm) +{ + blk_ksm_destroy(ksm); +} + +/** + * devm_blk_ksm_init() - Resource-managed blk_ksm_init() + * @dev: The device which owns the blk_keyslot_manager. + * @ksm: The blk_keyslot_manager to initialize. + * @num_slots: The number of key slots to manage. + * + * Like blk_ksm_init(), but causes blk_ksm_destroy() to be called automatically + * on driver detach. + * + * Return: 0 on success, or else a negative error code. + */ +int devm_blk_ksm_init(struct device *dev, struct blk_keyslot_manager *ksm, + unsigned int num_slots) +{ + int err = blk_ksm_init(ksm, num_slots); + + if (err) + return err; + + return devm_add_action_or_reset(dev, blk_ksm_destroy_callback, ksm); +} +EXPORT_SYMBOL_GPL(devm_blk_ksm_init); + static inline struct hlist_head * blk_ksm_hash_bucket_for_key(struct blk_keyslot_manager *ksm, const struct blk_crypto_key *key) |