Should it be      .attr    = { .name = "dualshock4_bt_poll_interval", .mode = 0644 },  ?

Or did you not expand the macro fully on purpose?

Thanks,
Terry

Here's my own quote

P.S. Macro was expanded and variable name was changed from `dev_attr_bt_poll_interval` to `dev_attr_dualshock4_bt_poll_interval` because this attribute only applies to DualShock4

So, yes, i expanded it like that on purpose, as it applies only to DS4, 
and while being attribute, it applies only per device, so no collision 
is possible.

You're welcome
Vadym