superfluous " else if ()"

/me wonders if this

        if (ret >= 0) {
                /* Add an item for the type for the first time */
                eb = path->nodes[0];
                slot = path->slots[0];
                offset = btrfs_item_ptr_offset(eb, slot);
        } else if (ret == -EEXIST) {
                /*
                 * An item with that type already exists.
                 * Extend the item and store the new subid at the end.
                 */
                btrfs_extend_item(uuid_root, path, sizeof(subid_le));
                eb = path->nodes[0];
                slot = path->slots[0];
                offset = btrfs_item_ptr_offset(eb, slot);
                offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
        } else if (ret < 0) {							<-----------------
                btrfs_warn(uuid_root->fs_info, "insert uuid item failed %d "
                        "(0x%016llx, 0x%016llx) type %u!",
                        ret, (unsigned long long)key.objectid,
                        (unsigned long long)key.offset, type);
                goto out;
        }

shouldn't be condensed into just "} else {" ?

Quoted 26 lines · Toralf Förster

/me wonders if this

        if (ret >= 0) {
                /* Add an item for the type for the first time */
                eb = path->nodes[0];
                slot = path->slots[0];
                offset = btrfs_item_ptr_offset(eb, slot);
        } else if (ret == -EEXIST) {
                /*
                 * An item with that type already exists.
                 * Extend the item and store the new subid at the end.
                 */
                btrfs_extend_item(uuid_root, path, sizeof(subid_le));
                eb = path->nodes[0];
                slot = path->slots[0];
                offset = btrfs_item_ptr_offset(eb, slot);
                offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
        } else if (ret < 0) {							<-----------------
                btrfs_warn(uuid_root->fs_info, "insert uuid item failed %d "
                        "(0x%016llx, 0x%016llx) type %u!",
                        ret, (unsigned long long)key.objectid,
                        (unsigned long long)key.offset, type);
                goto out;
        }

Quoted 1 line

shouldn't be condensed into just "} else {" ?

It's equivalent to the original code, but is easier to read/understand. Do you have there other concerns besides readability?

But what came into my mind, wouldn't the following avoid such question in future ? :

         } else {
		/* ret < 0 */