From: Stephen Rothwell <redacted>
Date: Mon, 30 Mar 2015 15:05:34 +1100

Caused by a bad merge between commits 1e9e39f4a298 ("usbnet: Fix
tx_packets stat for FLAG_MULTI_FRAME drivers") and 7a1e890e2168
("usbnet: Fix tx_bytes statistic running backward in cdc_ncm") form the
net tree and commit 6588af614e7b ("usbnet: Fix tx_packets stat for
FLAG_MULTI_FRAME drivers") from the net-next tree.  (Presumably,
6588af614e7b was cherry-picked as a bug fix.  So, Dave, something to
watch for if you merge net into net-next.)

Thanks a lot for bringing this to my attention Stephen.