Random question time. :) Do USB device drivers have to cancel all URBs that are pending for a device before calling usb_reset_device? Will the drivers have to wait for the URBs to complete before resetting the device? The specific random question I got asked by the chipset folks is: "Before issuing a Port Reset, is there any condition that the driver should remove the TD associated with the device?" Not quite sure what to make of that, since I don't know EHCI internals. The second question relates to the CLEAR_TT_BUFFER request, and it only applies to an Intel EHCI controller with a built-in rate matching hub (RMH). The chipset folks want to know if a CLEAR_TT_BUFFER request might be used before a port suspend or a port reset. It looks like the EHCI driver automatically clears the TT buffer, except when the host controller has a Transaction Translator built into the root hub, or we need to clear a TT buffer on an external HS hub. I assume that means we won't clear the TT buffer for the EHCI roothub, since this platform has a rate matching hub? Sarah Sharp -- 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
