Oliver Neukum <oneukum@xxxxxxxx> writes: >> I hope some of the USB experts can tell us what the correct behaviour >> is >> here. Should the driver treat EPROTO like ESHUTDOWN? Or should the >> host controller use some ESHUTDOWN instead? > > No. ESHUTDOWN is reserved for the removal of the HC. Then I have to ask: Why do I see ESHUTDOWN when I pull the modem from one of my ehci-pci ports? > The driver that does handle it in an exemplary manner is HID. > > You ought to limit the number of immediate retries to a very low > number, then use a timer with exponential backoff and then proceed > to reset, if applicable. > > Detection of a hot unplug is not immediate. It may take a few hundred > ms. Sounds reasonable. I guess this should be solved for all USB serial drivers having an interrupt in callback. Bjørn -- 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
