From mboxrd@z Thu Jan  1 00:00:00 1970
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Subject: [v5,4/6] usb: gadget: add mechanism to specify an explicit status stage
From: Paul Elder <paul.elder@ideasonboard.com>
Message-Id: <20190116050029.GA13084@localhost.localdomain>
Date: Wed, 16 Jan 2019 00:00:29 -0500
To: Alan Stern <stern@rowland.harvard.edu>
Cc: laurent.pinchart@ideasonboard.com, kieran.bingham@ideasonboard.com, b-liu@ti.com, rogerq@ti.com, balbi@kernel.org, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
List-ID: <linux-usb.vger.kernel.org>
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=