workqueue: cosmetic update in try_to_grab_pending()

With the recent is-work-queued-here test simplification, the nested
if() in try_to_grab_pending() can be collapsed.  Collapse it.

This patch is purely cosmetic.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>

kernel/workqueue.c

@@ -1107,24 +1107,21 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 	 * item is currently queued on that pool.
 	 */
 	cwq = get_work_cwq(work);
-	if (cwq) {
-		if (cwq->pool == pool) {
+	if (cwq && cwq->pool == pool) {
 		debug_work_deactivate(work);
 
 		/*
-			 * A delayed work item cannot be grabbed directly
-			 * because it might have linked NO_COLOR work items
-			 * which, if left on the delayed_list, will confuse
-			 * cwq->nr_active management later on and cause
-			 * stall.  Make sure the work item is activated
-			 * before grabbing.
+		 * A delayed work item cannot be grabbed directly because
+		 * it might have linked NO_COLOR work items which, if left
+		 * on the delayed_list, will confuse cwq->nr_active
+		 * management later on and cause stall.  Make sure the work
+		 * item is activated before grabbing.
 		 */
 		if (*work_data_bits(work) & WORK_STRUCT_DELAYED)
 			cwq_activate_delayed_work(work);
 
 		list_del_init(&work->entry);
-			cwq_dec_nr_in_flight(get_work_cwq(work),
-				get_work_color(work));
+		cwq_dec_nr_in_flight(get_work_cwq(work), get_work_color(work));
 
 		/* work->data points to cwq iff queued, point to pool */
 		set_work_pool_and_keep_pending(work, pool->id);
@@ -1132,7 +1129,6 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 		spin_unlock(&pool->lock);
 		return 1;
 	}
-	}
 	spin_unlock(&pool->lock);
 fail:
 	local_irq_restore(*flags);