In order to improve performance, this patch enabled mapping of USB request buffers in advance, before queueing them to the HW. This can be used when there is a pool or pre-mapped request buffers so we don't need to map it again every time the request gets queued. Change-Id: Ic3a6db749343ef1345e0816210517755aee055b3 Signed-off-by: Danny Segal <dsegal@codeaurora.org> Signed-off-by: Mayank Rana <mrana@codeaurora.org>