zpff_device 29 drivers/hid/hid-zpff.c struct zpff_device *zpff = data; zpff_device 55 drivers/hid/hid-zpff.c struct zpff_device *zpff; zpff_device 74 drivers/hid/hid-zpff.c zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);