usb: dwc3: gadget: improve ep_queue's error reporting

We shouldn't return -EBUSY, that's used only internally
when the core still has transfers in flight on a given
endpoint.

Also, combine the error reporting so that we don't have
to duplicate it.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2015-09-16 10:40:07 -05:00
commit a8f32817ee