At Mon, 22 Sep 2008 01:00:30 +0300, Lasse Kärkkäinen wrote:
This has been broken for a long time.
Symtoms: programs using the card while it is disconnected get stuck and cannot be killed, and OOPS is printed on the log:
Does the patch below cure the problem?
thanks,
Takashi
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c index c0c7770..5962e4b 100644 --- a/sound/usb/usbmidi.c +++ b/sound/usb/usbmidi.c @@ -1112,6 +1112,15 @@ void snd_usbmidi_disconnect(struct list_head* p) } if (ep->in) usb_kill_urb(ep->in->urb); + /* free endpoints here; later call can result in Oops */ + if (ep->out) { + snd_usbmidi_out_endpoint_delete(ep->out); + ep->out = NULL; + } + if (ep->in) { + snd_usbmidi_in_endpoint_delete(ep->in); + ep->in = NULL; + } } del_timer_sync(&umidi->error_timer); }