We need to return error to caller if command is not sent to
controller succesfully.
Signed-off-by: NSubbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Fixes: b09bb642 (usb: dwc3: gadget: implement Global Command support)
Cc: <stable@vger.kernel.org> #v3.5+
Signed-off-by: NFelipe Balbi <balbi@ti.com>