mISDN: don't use flush_scheduled_work()

flush_scheduled_work() is deprecated and scheduled to be removed.
Directly flush ch->workq when freeing channel and cancel it on
release.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: netdev@vger.kernel.org

drivers/isdn/mISDN/hwchannel.c

@@ -110,7 +110,7 @@ mISDN_freedchannel(struct dchannel *ch)
 	}
 	skb_queue_purge(&ch->squeue);
 	skb_queue_purge(&ch->rqueue);
-	flush_scheduled_work();
+	flush_work_sync(&ch->workq);
 	return 0;
 }
 EXPORT_SYMBOL(mISDN_freedchannel);
@@ -143,7 +143,7 @@ mISDN_freebchannel(struct bchannel *ch)
 	mISDN_clear_bchannel(ch);
 	skb_queue_purge(&ch->rqueue);
 	ch->rcount = 0;
-	flush_scheduled_work();
+	flush_work_sync(&ch->workq);
 	return 0;
 }
 EXPORT_SYMBOL(mISDN_freebchannel);

drivers/isdn/mISDN/l1oip_core.c

@@ -1269,6 +1269,8 @@ release_card(struct l1oip *hc)
 	if (timer_pending(&hc->timeout_tl))
 		del_timer(&hc->timeout_tl);
 
+	cancel_work_sync(&hc->workq);
+
 	if (hc->socket_thread)
 		l1oip_socket_close(hc);