On Fri, Jan 03, 2014 at 04:49:16PM -0800, Greg KH wrote: > On Fri, Jan 03, 2014 at 04:22:45PM -0800, Sarah Sharp wrote: > > Occasionally when a USB 3.0 device is disconnected, the roothub port > > goes into the SS.Inactive state, rather than reporting a disconnect. > > Is that a hardware bug? Or just something inherent in how the spec says > things can work?
Inherent in how the spec works. If link training with the device fails in a specific way, USB 3.0 hubs and host ports will go into this state. The xHCI roothub port state machines show it's valid for the host to transition into SS.Inactive from any state (except powered off or disabled). Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
