[PATCH v2] io_uring/io-wq: fix incorrect io_wq_for_each_worker() termination logic

[Jens Axboe <axboe@kernel.dk>]

A previous commit added this helper, and had it terminate if false is
returned from the handler. However, that is completely opposite, it
should abort the loop if true is returned.

Fix this up by having io_wq_for_each_worker() keep iterating as long
as false is returned, and only abort if true is returned.

Cc: stable@vger.kernel.org
Fixes: 751eedc4b4b7 ("io_uring/io-wq: move worker lists to struct io_wq_acct")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

---

v2: fix the actual bug, rather than work-around it for the exit
    condition only.

diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c
index cd13d8aac3d2..6c5ef629e59a 100644
--- a/io_uring/io-wq.c
+++ b/io_uring/io-wq.c
@@ -952,11 +952,11 @@ static bool io_wq_for_each_worker(struct io_wq *wq,
 				  void *data)
 {
 	for (int i = 0; i < IO_WQ_ACCT_NR; i++) {
-		if (!io_acct_for_each_worker(&wq->acct[i], func, data))
-			return false;
+		if (io_acct_for_each_worker(&wq->acct[i], func, data))
+			return true;
 	}
 
-	return true;
+	return false;
 }
 
 static bool io_wq_worker_wake(struct io_worker *worker, void *data)

-- 
Jens Axboe