Function disk_add_blk_dev

components/drivers/block/blk_dev.c:176–238

}

rt_err_t disk_add_blk_dev(struct rt_blk_disk *disk, struct rt_blk_device *blk)
{
    rt_err_t err;
#ifdef RT_USING_DM
    int device_id;
#endif
    const char *disk_name, *name_fmt;

    if (!disk || !blk)
    {
        return -RT_EINVAL;
    }

#ifdef RT_USING_DM
    if ((device_id = rt_dm_ida_alloc(disk->ida)) < 0)
    {
        return -RT_EFULL;
    }
#endif

    blk->disk = disk;
    rt_list_init(&blk->list);

    disk_name = to_disk_name(disk);

    /* End is [a-zA-Z] or [0-9] */
    if (disk_name[rt_strlen(disk_name) - 1] < 'a')
    {
        name_fmt = "%sp%d";
    }
    else
    {
        name_fmt = "%s%d";
    }

#ifdef RT_USING_DM
    rt_dm_dev_set_name(&blk->parent, name_fmt, disk_name, blk->partno);
    blk->parent.master_id = disk->ida->master_id;
    blk->parent.device_id = device_id;
#else
    rt_snprintf(blk->parent.parent.name, RT_NAME_MAX, name_fmt, disk_name, blk->partno);
#endif
    device_set_blk_fops(&blk->parent);

    err = rt_device_register(&blk->parent, to_blk_name(blk),
            disk->parent.flag & RT_DEVICE_FLAG_RDWR);

    if (err)
    {
    #ifdef RT_USING_DM
        rt_dm_ida_free(disk->ida, device_id);
    #endif
        return err;
    }

    spin_lock(&disk->lock);

    rt_list_insert_before(&disk->part_nodes, &blk->list);