Bug#785606: linux-image-4.0.0-1-amd64: DragonRise joystick support broken in 4.0.2-1

[Florent Rougon <f.rougon@free.fr>]

Update:
  - upstream kernel 4.3.3 (most probably Debian also) and many kernels
    (probably all) between, at least and inclusive on both ends, versions
    4.0.2 and 4.3.3 are affected by this bug;
  - upstream kernel 4.5.5 is *not affected*; Debian kernels 4.5.4-1 and
    4.5.5-1 are *not affected* either (the axes numbers have changed
    since 3.16.7, I believe, but this is a minor inconvenience);
  - Benjamin Tissoires replied to me;
  - why recent kernels are not affected is still unclear, because the
    code from commit 79346d620e9de87912de73337f6df8b7f9a46888 is still
    there---I imagine that some change between 4.3.3 and 4.5.4 maybe
    causes the DragonRise joypad to use a code path that doesn't go
    through the lines added by said commit;
  - I offered to build a patched kernel with debug statements to clarify
    this point.

-- 
Florent