linux-kernel - Re: [PATCH 1/1] usbmon: usb monitor binary data incorrectly reported for isoc transfers

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Date:	Mon, 13 Dec 2010 11:55:30 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Pete Zaitcev <zaitcev@...hat.com>
cc:	morroww6@...scape.net, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>, <nm127@...email.hu>
Subject: Re: [PATCH 1/1] usbmon:  usb monitor binary data incorrectly reported
 for isoc transfers

On Sun, 12 Dec 2010, Pete Zaitcev wrote:

> This looks obviously incorrect. If anyone ever submits an ISO with
> the newfanged s/g URB, we're going to copy the scatterlist (if not
> crash).

That won't happen.  We support scatter-gather URBs really just for bulk
transfers.  They can also be used for interrupt (though I don't know
why anyone would want to), and just possibly for control (not supported
by all HCDs), but not for isochronous transfers.

Alan Stern

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