Dear all, I am a newbie and trying to understand Sarah xHCI driver code. in xhci_alloc_virt_device(), EP(Default control) ring has been allocated using the following call. dev->eps[0].ring = xhci_ring_alloc(xhci, 1, true, flags); But still I was unable to understand, how this EP will be accessed by the xHC, means where the EP ring was linked to dev context. Thanks in Advance, Aditya -- 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