Jerome Brunet [off-list ref] writes:

'struct uac_req' purpose is to link 'struct usb_request' to the
corresponding 'struct uac_rtd_params'. However member req is never
used. Using the context of the usb request, we can keep track of the
corresponding 'struct uac_rtd_params' just as well, without allocating
extra memory.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

Acked-by: Felipe Balbi <balbi@kernel.org>

-- 
balbi