It seems the bug was fixed by this upstream commit: commit 18339f59c3a6698ee17d32970c9e1e450b16e7c3 Author: Maciej Zuk Date: Thu Sep 3 21:46:39 2015 +0200
HID: dragonrise: fix HID Descriptor for 0x0006 PID Fixed HID descriptor for DragonRise Joystick. Replaced default descriptor which doubles Z axis and causes mixing values of X and Z axes. This means the first release incorporating the fix is v4.4 (v4.4-rc1 already contains it). -- Florent