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Dimitris Lampridis authored
in case the device still has the FTDI VID and PID, the ftdi_sio module might be loaded, in which case some of the udev matches will not have attributes such as "busnum", "devnum" (and certainly not "serial"). We can be more careful by checking if udev_device_get_sysattr_value() returns NULL before doing the strcpy() to avoid segfaults.
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