diff --git a/sys/dev/usb/input/uhid.c b/sys/dev/usb/input/uhid.c
index 99e4b5d5125c..b6fa631fd31c 100644
--- a/sys/dev/usb/input/uhid.c
+++ b/sys/dev/usb/input/uhid.c
@@ -668,8 +668,8 @@ uhid_attach(device_t dev)
 			 * feature report ID 2 before it'll start
 			 * returning digitizer data.
 			 */
-			error = usb2_req_set_report
-			    (uaa->device, &Giant, reportbuf, sizeof(reportbuf),
+			error = usb2_req_set_report(uaa->device, NULL,
+			    reportbuf, sizeof(reportbuf),
 			    uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, 2);
 
 			if (error) {
@@ -691,16 +691,16 @@ uhid_attach(device_t dev)
 	}
 	if (sc->sc_repdesc_ptr == NULL) {
 
-		error = usb2_req_get_hid_desc
-		    (uaa->device, &Giant, &sc->sc_repdesc_ptr,
-		    &sc->sc_repdesc_size, M_USBDEV, uaa->info.bIfaceIndex);
+		error = usb2_req_get_hid_desc(uaa->device, NULL,
+		    &sc->sc_repdesc_ptr, &sc->sc_repdesc_size,
+		    M_USBDEV, uaa->info.bIfaceIndex);
 
 		if (error) {
 			device_printf(dev, "no report descriptor\n");
 			goto detach;
 		}
 	}
-	error = usb2_req_set_idle(uaa->device, &Giant,
+	error = usb2_req_set_idle(uaa->device, NULL,
 	    uaa->info.bIfaceIndex, 0, 0);
 
 	if (error) {
diff --git a/sys/dev/usb/input/ums.c b/sys/dev/usb/input/ums.c
index 5b884e8a44dd..9539e20905d2 100644
--- a/sys/dev/usb/input/ums.c
+++ b/sys/dev/usb/input/ums.c
@@ -338,7 +338,7 @@ ums_probe(device_t dev)
 	    (id->bInterfaceClass != UICLASS_HID))
 		return (ENXIO);
 
-	error = usb2_req_get_hid_desc(uaa->device, &Giant,
+	error = usb2_req_get_hid_desc(uaa->device, NULL,
 	    &d_ptr, &d_len, M_TEMP, uaa->info.bIfaceIndex);
 
 	if (error)
@@ -395,8 +395,7 @@ ums_attach(device_t dev)
 		DPRINTF("error=%s\n", usb2_errstr(err));
 		goto detach;
 	}
-	err = usb2_req_get_hid_desc
-	    (uaa->device, &Giant, &d_ptr,
+	err = usb2_req_get_hid_desc(uaa->device, NULL, &d_ptr,
 	    &d_len, M_TEMP, uaa->info.bIfaceIndex);
 
 	if (err) {
diff --git a/sys/dev/usb/serial/ubser.c b/sys/dev/usb/serial/ubser.c
index 3aaad78acd33..266af1d5bca9 100644
--- a/sys/dev/usb/serial/ubser.c
+++ b/sys/dev/usb/serial/ubser.c
@@ -244,8 +244,8 @@ ubser_attach(device_t dev)
 	req.wIndex[0] = sc->sc_iface_no;
 	req.wIndex[1] = 0;
 	USETW(req.wLength, 1);
-	error = usb2_do_request_flags
-	    (uaa->device, &Giant, &req, &sc->sc_numser,
+	error = usb2_do_request_flags(uaa->device, NULL,
+	    &req, &sc->sc_numser,
 	    0, NULL, USB_DEFAULT_TIMEOUT);
 
 	if (error || (sc->sc_numser == 0)) {
diff --git a/sys/dev/usb/serial/ucycom.c b/sys/dev/usb/serial/ucycom.c
index ff965cacd2c0..a7f569981bdf 100644
--- a/sys/dev/usb/serial/ucycom.c
+++ b/sys/dev/usb/serial/ucycom.c
@@ -222,8 +222,7 @@ ucycom_attach(device_t dev)
 
 	/* get report descriptor */
 
-	error = usb2_req_get_hid_desc
-	    (uaa->device, &Giant,
+	error = usb2_req_get_hid_desc(uaa->device, NULL,
 	    &urd_ptr, &urd_len, M_USBDEV,
 	    UCYCOM_IFACE_INDEX);
 
diff --git a/sys/dev/usb/serial/umodem.c b/sys/dev/usb/serial/umodem.c
index 9960635dd926..9c53c884a3c1 100644
--- a/sys/dev/usb/serial/umodem.c
+++ b/sys/dev/usb/serial/umodem.c
@@ -769,7 +769,7 @@ umodem_set_comm_feature(struct usb2_device *udev, uint8_t iface_no,
 	USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH);
 	USETW(ast.wState, state);
 
-	return (usb2_do_request(udev, &Giant, &req, &ast));
+	return (usb2_do_request(udev, NULL, &req, &ast));
 }
 
 static int
diff --git a/sys/dev/usb/serial/uplcom.c b/sys/dev/usb/serial/uplcom.c
index 44e676b22759..a915160240ba 100644
--- a/sys/dev/usb/serial/uplcom.c
+++ b/sys/dev/usb/serial/uplcom.c
@@ -441,7 +441,7 @@ uplcom_reset(struct uplcom_softc *sc, struct usb2_device *udev)
 	req.wIndex[1] = 0;
 	USETW(req.wLength, 0);
 
-	return (usb2_do_request(udev, &Giant, &req, NULL));
+	return (usb2_do_request(udev, NULL, &req, NULL));
 }
 
 struct pl2303x_init {
@@ -485,7 +485,7 @@ uplcom_pl2303x_init(struct usb2_device *udev)
 		USETW(req.wIndex, pl2303x[i].index);
 		USETW(req.wLength, pl2303x[i].length);
 
-		err = usb2_do_request(udev, &Giant, &req, buf);
+		err = usb2_do_request(udev, NULL, &req, buf);
 		if (err) {
 			DPRINTF("error=%s\n", usb2_errstr(err));
 			return (EIO);
diff --git a/sys/dev/usb/serial/uvisor.c b/sys/dev/usb/serial/uvisor.c
index 0fb06581d790..bff317bef44a 100644
--- a/sys/dev/usb/serial/uvisor.c
+++ b/sys/dev/usb/serial/uvisor.c
@@ -373,8 +373,8 @@ uvisor_init(struct uvisor_softc *sc, struct usb2_device *udev, struct usb2_confi
 		USETW(req.wValue, 0);
 		USETW(req.wIndex, 0);
 		USETW(req.wLength, UVISOR_CONNECTION_INFO_SIZE);
-		err = usb2_do_request_flags
-		    (udev, &Giant, &req, &coninfo, USB_SHORT_XFER_OK,
+		err = usb2_do_request_flags(udev, NULL,
+		    &req, &coninfo, USB_SHORT_XFER_OK,
 		    &actlen, USB_DEFAULT_TIMEOUT);
 
 		if (err) {
@@ -427,7 +427,7 @@ uvisor_init(struct uvisor_softc *sc, struct usb2_device *udev, struct usb2_confi
 		USETW(req.wLength, UVISOR_GET_PALM_INFORMATION_LEN);
 
 		err = usb2_do_request_flags
-		    (udev, &Giant, &req, &pconinfo, USB_SHORT_XFER_OK,
+		    (udev, NULL, &req, &pconinfo, USB_SHORT_XFER_OK,
 		    &actlen, USB_DEFAULT_TIMEOUT);
 
 		if (err) {
@@ -468,7 +468,7 @@ uvisor_init(struct uvisor_softc *sc, struct usb2_device *udev, struct usb2_confi
 		USETW(req.wIndex, 0);
 		USETW(req.wLength, 1);
 
-		err = usb2_do_request(udev, &Giant, &req, buffer);
+		err = usb2_do_request(udev, NULL, &req, buffer);
 		if (err) {
 			goto done;
 		}
@@ -479,7 +479,7 @@ uvisor_init(struct uvisor_softc *sc, struct usb2_device *udev, struct usb2_confi
 		USETW(req.wValue, 0);
 		USETW(req.wIndex, 0);
 		USETW(req.wLength, 1);
-		err = usb2_do_request(udev, &Giant, &req, buffer);
+		err = usb2_do_request(udev, NULL, &req, buffer);
 		if (err) {
 			goto done;
 		}
@@ -490,7 +490,7 @@ uvisor_init(struct uvisor_softc *sc, struct usb2_device *udev, struct usb2_confi
 	USETW(req.wValue, 0);
 	USETW(req.wIndex, 5);
 	USETW(req.wLength, sizeof(wAvail));
-	err = usb2_do_request(udev, &Giant, &req, &wAvail);
+	err = usb2_do_request(udev, NULL, &req, &wAvail);
 	if (err) {
 		goto done;
 	}
diff --git a/sys/dev/usb/storage/umass.c b/sys/dev/usb/storage/umass.c
index a3fc19899469..c4d8ae1380b2 100644
--- a/sys/dev/usb/storage/umass.c
+++ b/sys/dev/usb/storage/umass.c
@@ -1583,7 +1583,7 @@ umass_attach(device_t dev)
 	 * some devices need a delay after that the configuration value is
 	 * set to function properly:
 	 */
-	usb2_pause_mtx(&Giant, hz);
+	usb2_pause_mtx(NULL, hz);
 
 	/* register the SIM */
 	err = umass_cam_attach_sim(sc);
@@ -1642,7 +1642,7 @@ umass_init_shuttle(struct umass_softc *sc)
 	req.wIndex[0] = sc->sc_iface_no;
 	req.wIndex[1] = 0;
 	USETW(req.wLength, sizeof(status));
-	err = usb2_do_request(sc->sc_udev, &Giant, &req, &status);
+	err = usb2_do_request(sc->sc_udev, NULL, &req, &status);
 
 	DPRINTF(sc, UDMASS_GEN, "Shuttle init returned 0x%02x%02x\n",
 	    status[0], status[1]);
@@ -2161,7 +2161,7 @@ umass_bbb_get_max_lun(struct umass_softc *sc)
 	req.wIndex[1] = 0;
 	USETW(req.wLength, 1);
 
-	err = usb2_do_request(sc->sc_udev, &Giant, &req, &buf);
+	err = usb2_do_request(sc->sc_udev, NULL, &req, &buf);
 	if (err) {
 		buf = 0;