iocost: Fix check condition of iocg abs_vdebt

We shouldn't skip iocg when its abs_vdebt is not zero.

Fixes: 0b80f98 ("iocost: protect iocg->abs_vdebt with iocg->waitq.lock")
Signed-off-by: Chengming Zhou <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

Author: Chengming Zhou

block/blk-iocost.c

@@ -1370,7 +1370,7 @@ static void ioc_timer_fn(struct timer_list *timer)
 	 * should have woken up in the last period and expire idle iocgs.
 	 */
 	list_for_each_entry_safe(iocg, tiocg, &ioc->active_iocgs, active_list) {
-		if (!waitqueue_active(&iocg->waitq) && iocg->abs_vdebt &&
+		if (!waitqueue_active(&iocg->waitq) && !iocg->abs_vdebt &&
 		    !iocg_is_idle(iocg))
 			continue;