Package: lintian Version: 2.5.52 Severity: minor usb-modeswitch-data ships with 40-usb_modeswitch.rules [0] which has 388 rules that all trigger the udev-rule-missing-subsystem lintian warning. Point is, that file has all the matching entries within a SUBSYSTEM/GOTO block (see lines 12 and 1181); that makes the lintian warning a false positive.
I have added this lintian warning override in the package but figured it would be nice to let you know. Cheers, OdyX [0] http://sources.debian.net/src/usb-modeswitch-data/20170205-1/40-usb_modeswitch.rules/