On Tue, 5 Mar 2013, Lan Tianyu wrote: > Ok apply it. Retest. No problem. > > The following log only takes place When I stop ehci-test or unplug > device during test. > [ 140.871303] ehci-pci 0000:00:1a.0: shutdown urb ffff88014545f0c0 ep1in-bulk > [ 140.878231] ehci-pci 0000:00:1a.0: shutdown urb ffff88014545fcc0 ep1in-bulk > [ 140.885158] ehci-pci 0000:00:1a.0: shutdown urb ffff88014545fb40 ep1in-bulk > [ 140.892088] ehci-pci 0000:00:1a.0: shutdown urb ffff88014545f9c0 ep1in-bulk Those are normal debugging messages. It looks like Intel fixed the EHCI bug in the Sandybridge incarnation. Thanks for testing. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html