diff options
| -rw-r--r-- | block/blk-integrity.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index 61a8e2f8fdd0..91fa8e06b6a5 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -309,24 +309,24 @@ static struct kobj_type integrity_ktype = { /** * blk_integrity_register - Register a gendisk as being integrity-capable * @disk: struct gendisk pointer to make integrity-aware - * @template: integrity profile + * @template: optional integrity profile to register * * Description: When a device needs to advertise itself as being able * to send/receive integrity metadata it must use this function to * register the capability with the block layer. The template is a * blk_integrity struct with values appropriate for the underlying - * hardware. See Documentation/block/data-integrity.txt. + * hardware. If template is NULL the new profile is allocated but + * not filled out. See Documentation/block/data-integrity.txt. */ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template) { struct blk_integrity *bi; BUG_ON(disk == NULL); - BUG_ON(template == NULL); if (disk->integrity == NULL) { bi = kmem_cache_alloc(integrity_cachep, - GFP_KERNEL | __GFP_ZERO); + GFP_KERNEL | __GFP_ZERO); if (!bi) return -1; @@ -346,13 +346,16 @@ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template) bi = disk->integrity; /* Use the provided profile as template */ - bi->name = template->name; - bi->generate_fn = template->generate_fn; - bi->verify_fn = template->verify_fn; - bi->tuple_size = template->tuple_size; - bi->set_tag_fn = template->set_tag_fn; - bi->get_tag_fn = template->get_tag_fn; - bi->tag_size = template->tag_size; + if (template != NULL) { + bi->name = template->name; + bi->generate_fn = template->generate_fn; + bi->verify_fn = template->verify_fn; + bi->tuple_size = template->tuple_size; + bi->set_tag_fn = template->set_tag_fn; + bi->get_tag_fn = template->get_tag_fn; + bi->tag_size = template->tag_size; + } else + bi->name = "unsupported"; return 0; } |