> > On Tue, 24 Dec 2013, Alan Stern wrote: > > I think this will fix it. Take a close look and do some careful testing. > > > > Alan Stern > > > > Index: usb-3.13/drivers/usb/core/hub.c > > > ========================================================== > > --- usb-3.13.orig/drivers/usb/core/hub.c > > +++ usb-3.13/drivers/usb/core/hub.c > > @@ -1622,11 +1622,14 @@ static void hub_disconnect(struct usb_in > > hub->error = 0; > > hub_quiesce(hub, HUB_DISCONNECT); > > > > - usb_set_intfdata (intf, NULL); > > - > > for (i = 0; i < hdev->maxchild; i++) > > usb_hub_remove_port_device(hub, i + 1); > > + > > + /* Avoid races with recursively_mark_NOTATTACHED() */ > > + spin_lock_irq(&device_state_lock); > > hub->hdev->maxchild = 0; > > + usb_set_intfdata(intf, NULL); > > + spin_unlock_irq(&device_state_lock); > > > > if (hub->hdev->speed == USB_SPEED_HIGH) > > highspeed_hubs--; > > > > Sorry for late response. Agree with you. I will test your patch carefully and > let you know the result. Thanks! I can reproduce issue by adding a delay just after usb_set_intfdata(intf, NULL) (echo -1 > bConfigurationValue to trigger hub_dissconnect())without your patch. After patch applied, cannot reproduce and didn't found any other issue. Patch works well. Alan, need I update patch to v2 or you will do it? Du, Changbin -- 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
