On 01/19/2015 07:27 PM, Brian C. Lane wrote: > On Mon, Jan 19, 2015 at 02:19:42PM +0100, Radek Vykydal wrote: >> + options = device.format.options + ",ro" > You should protect against device.format.options being "" or None here. > Ok, I'll update the patch for rhel7-branch.