From: Jiri Slaby <jslaby@xxxxxxx> Date: Mon, 25 Jun 2018 09:26:27 +0200 > When unplugging an r8152 adapter while the interface is UP, the NIC > becomes unusable. usb->disconnect (aka rtl8152_disconnect) deletes > napi. Then, rtl8152_disconnect calls unregister_netdev and that invokes > netdev->ndo_stop (aka rtl8152_close). rtl8152_close tries to > napi_disable, but the napi is already deleted by disconnect above. So > the first while loop in napi_disable never finishes. This results in > complete deadlock of the network layer as there is rtnl_mutex held by > unregister_netdev. > > So avoid the call to napi_disable in rtl8152_close when the device is > already gone. > > The other calls to usb_kill_urb, cancel_delayed_work_sync, > netif_stop_queue etc. seem to be fine. The urb and netdev is not > destroyed yet. > > Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Applied, thank you. -- 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
