From 482ef1d2fec5e5d44d97f7e20b4ccf3d3604aaae Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Thu, 14 Mar 2013 10:48:02 +0200
Subject: [PATCH] usb: gadget: uvc: remove references to DMA_ADDR_INVALID

gadget drivers shouldn't touch req->dma at all,
since UDC drivers are the ones required to handle
mapping and unmapping of the request buffer.

Remove references to DMA_ADDR_INVALID so we don't
creat false expectations to gadget driver writers.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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