1 files changed, 7 insertions, 22 deletions

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 507b1c608941..dbeef303f27b 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -166,11 +166,6 @@ THROTL_TG_FNS(on_rr);
 #define throtl_log(td, fmt, args...)    \
         blk_add_trace_msg((td)->queue, "throtl " fmt, ##args)
 
-static inline unsigned int total_nr_queued(struct throtl_data *td)
-{
-        return td->nr_queued[0] + td->nr_queued[1];
-}
-
 /*
  * Worker for allocating per cpu stat for tgs. This is scheduled on the
  * system_wq once there are some groups on the alloc_list waiting for
@@ -402,25 +397,18 @@ static void throtl_schedule_delayed_work(struct throtl_data *td,
 {
         struct delayed_work *dwork = &td->dispatch_work;
 
-        if (total_nr_queued(td)) {
-                mod_delayed_work(kthrotld_workqueue, dwork, delay);
-                throtl_log(td, "schedule work. delay=%lu jiffies=%lu",
-                           delay, jiffies);
-        }
+        mod_delayed_work(kthrotld_workqueue, dwork, delay);
+        throtl_log(td, "schedule work. delay=%lu jiffies=%lu", delay, jiffies);
 }
 
 static void throtl_schedule_next_dispatch(struct throtl_data *td)
 {
         struct throtl_rb_root *st = &td->tg_service_tree;
 
-        /*
-         * If there are more bios pending, schedule more work.
-         */
-        if (!total_nr_queued(td))
+        /* any pending children left? */
+        if (!st->count)
                 return;
 
-        BUG_ON(!st->count);
-
         update_min_dispatch_time(st);
 
         if (time_before_eq(st->min_disptime, jiffies))
@@ -844,14 +832,11 @@ void blk_throtl_dispatch_work_fn(struct work_struct *work)
 
         spin_lock_irq(q->queue_lock);
 
-        if (!total_nr_queued(td))
-                goto out;
-
         bio_list_init(&bio_list_on_stack);
 
         throtl_log(td, "dispatch nr_queued=%u read=%u write=%u",
-                        total_nr_queued(td), td->nr_queued[READ],
-                        td->nr_queued[WRITE]);
+                   td->nr_queued[READ] + td->nr_queued[WRITE],
+                   td->nr_queued[READ], td->nr_queued[WRITE]);
 
         nr_disp = throtl_select_dispatch(td, &bio_list_on_stack);
 
@@ -859,7 +844,7 @@ void blk_throtl_dispatch_work_fn(struct work_struct *work)
                 throtl_log(td, "bios disp=%u", nr_disp);
 
         throtl_schedule_next_dispatch(td);
-out:
+
         spin_unlock_irq(q->queue_lock);
 
         /*