generic_usb_hosts
=================
Probe the generic USB host information.

Function Arguments
------------------
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   * - Name
     - Type
     - Description

   * - dir_path
     - str, None
     - (optional; default: ``None``) The path used to search for device sysfs data. First all symlinks are resolved, to the the "real" path. Then iteratively search toward parent folder until the remaining path contains the relevent data fields.