refuse to do polled isochronous transfers, as other usb controller drivers do

requested by mpi@

diff --git a/sys/dev/usb/dwc2/dwc2.c b/sys/dev/usb/dwc2/dwc2.c
index 09c2a2c..c5d98b3 100644 (file)
--- a/sys/dev/usb/dwc2/dwc2.c
+++ b/sys/dev/usb/dwc2/dwc2.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: dwc2.c,v 1.26 2015/06/08 00:46:33 jmatthew Exp $      */
+/*     $OpenBSD: dwc2.c,v 1.27 2015/06/08 00:58:23 jmatthew Exp $      */
 /*     $NetBSD: dwc2.c,v 1.32 2014/09/02 23:26:20 macallan Exp $       */
 
 /*-
@@ -1221,14 +1221,15 @@ dwc2_device_isoc_start(struct usbd_xfer *xfer)
        struct dwc2_softc *sc = DWC2_DPIPE2SC(dpipe);
        usbd_status err;
 
+       /* Why would you do that anyway? */
+       if (sc->sc_bus.use_polling)
+               return (USBD_INVAL);
+
        mtx_enter(&sc->sc_lock);
        xfer->status = USBD_IN_PROGRESS;
        err = dwc2_device_start(xfer);
        mtx_leave(&sc->sc_lock);
 
-       if (sc->sc_bus.use_polling)
-               dwc2_waitintr(sc, xfer);
-
        return err;
 }