io_uring/iopoll: fix unexpected returns

We may propagate a positive return value of io_run_task_work() out of
io_iopoll_check(), which breaks our tests. io_run_task_work() doesn't
return anything useful for us, ignore the return value.

Fixes: c0e0d6ba25f1 ("io_uring: add IORING_SETUP_DEFER_TASKRUN")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/c442bb87f79cea10b3f857cbd4b9a4f0a0493fa3.1662652536.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 39dda1b..c6c32aa 100644 (file)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1435,12 +1435,9 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
                                u32 tail = ctx->cached_cq_tail;
 
                                mutex_unlock(&ctx->uring_lock);
-                               ret = io_run_task_work();
+                               io_run_task_work();
                                mutex_lock(&ctx->uring_lock);
 
-                               if (ret < 0)
-                                       break;
-
                                /* some requests don't go through iopoll_list */
                                if (tail != ctx->cached_cq_tail ||
                                    wq_list_empty(&ctx->iopoll_list))