io_uring/io-wq: fix incorrect io_wq_for_each_worker() termination logic

io_uring/io-wq: fix incorrect io_wq_for_each_worker() termination logic

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")
Reported-by: Lewis Campbell <info@lewiscampbell.tech>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>