staging: wlan-ng: Remove flush_scheduled_work

flush_scheduled_work() is scheduled for deprecation. Use
cancel_work_sync() instead to ensure that there is no pending or
running work item.

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/wlan-ng/prism2usb.c b/drivers/staging/wlan-ng/prism2usb.c
index 194f67e..ae6a53c 100644
--- a/drivers/staging/wlan-ng/prism2usb.c
+++ b/drivers/staging/wlan-ng/prism2usb.c
@@ -177,7 +177,8 @@
 		tasklet_kill(&hw->completion_bh);
 		tasklet_kill(&hw->reaper_bh);
 
-		flush_scheduled_work();
+		cancel_work_sync(&hw->link_bh);
+		cancel_work_sync(&hw->commsqual_bh);
 
 		/* Now we complete any outstanding commands
 		 * and tell everyone who is waiting for their