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Date: Thu, 30 Jan 2014 14:45:36 -0500 From: Mark Lord <mlord@...ox.com> To: Sarah Sharp <sarah.a.sharp@...ux.intel.com>, David Laight <David.Laight@...LAB.COM> CC: "renevant@...ernode.on.net" <renevant@...ernode.on.net>, "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: Help testing for USB ethernet/xHCI regression On 14-01-30 01:44 PM, Sarah Sharp wrote: .. > Since the USB ethernet scatter-gather support wasn't added until the > 3.12 kernel, it's unlikely that the xHCI TD fragment issue is actually > the root cause. > > The interesting piece of information in that report is that when the USB > 3.0 device falls back to USB 2.0 speeds under xHCI, it works. Could be due to something related to the max URB length: USB 2.0 High-Speed: max URB length 512. USB 3.0 Super-Speed: max URB length 1024. Cheers -- Mark Lord Real-Time Remedies Inc. mlord@...ox.com -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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