linux-phytec-ti

usb: gadget: f_midi: check for error on usb_ep_queue

f_midi is not checking whether there is an error on usb_ep_queue
request, ignoring potential problems, such as memory leaks.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>