staging: r8188eu: remove intf_stop pointer

Remove the intf_stop pointer that points to a media-specific stop
function. The r8188eu driver supports only usb.

For usb drivers, intf_stop points to usb_intf_stop, which is only
two lines long.  We can remove intf_stop and usb_intf_stop and call
the two cancel functions directly.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230206201800.139195-7-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/drv_types.h

@@ -171,7 +171,6 @@ struct adapter {
 	s8	signal_strength;
 
 	void *cmdThread;
-	void (*intf_stop)(struct adapter *adapter);
 	struct  net_device *pnetdev;
 
 	/*  used by rtw_rereg_nd_name related function */

drivers/staging/r8188eu/os_dep/os_intfs.c

@@ -761,8 +761,8 @@ void rtw_ips_dev_unload(struct adapter *padapter)
 {
 	rtw_fifo_cleanup(padapter);
 
-	if (padapter->intf_stop)
-		padapter->intf_stop(padapter);
+	rtw_read_port_cancel(padapter);
+	rtw_write_port_cancel(padapter);
 
 	/* s5. */
 	if (!padapter->bSurpriseRemoved)

drivers/staging/r8188eu/os_dep/usb_intf.c

@@ -152,17 +152,6 @@ static void usb_dvobj_deinit(struct usb_interface *usb_intf)
 
 }
 
-static void usb_intf_stop(struct adapter *padapter)
-{
-	/* cancel in irp */
-	rtw_read_port_cancel(padapter);
-
-	/* cancel out irp */
-	rtw_write_port_cancel(padapter);
-
-	/* todo:cancel other irps */
-}
-
 static void rtw_dev_unload(struct adapter *padapter)
 {
 	if (padapter->bup) {
@@ -170,8 +159,9 @@ static void rtw_dev_unload(struct adapter *padapter)
 		if (padapter->xmitpriv.ack_tx)
 			rtw_ack_tx_done(&padapter->xmitpriv, RTW_SCTX_DONE_DRV_STOP);
 		/* s3. */
-		if (padapter->intf_stop)
-			padapter->intf_stop(padapter);
+		rtw_read_port_cancel(padapter);
+		rtw_write_port_cancel(padapter);
+
 		/* s4. */
 		rtw_stop_drv_threads(padapter);
 
@@ -308,8 +298,6 @@ static int rtw_usb_if1_init(struct dvobj_priv *dvobj, struct usb_interface *pusb
 	SET_NETDEV_DEV(pnetdev, dvobj_to_dev(dvobj));
 	padapter = rtw_netdev_priv(pnetdev);
 
-	padapter->intf_stop = &usb_intf_stop;
-
 	/* step read_chip_version */
 	rtl8188e_read_chip_version(padapter);