selftests/net: io_uring: fix unknown errnum values

The io_uring functions return negative error values, but error() expects
these to be positive to properly match them to an errno string. Fix this
to make sure the correct error descriptions are displayed upon failure.

Signed-off-by: Carlos Llamas <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

tools/testing/selftests/net/io_uring_zerocopy_tx.c

···
 
 	ret = io_uring_queue_init(512, &ring, 0);
 	if (ret)
-		error(1, ret, "io_uring: queue init");
+		error(1, -ret, "io_uring: queue init");
 
 	iov.iov_base = payload;
 	iov.iov_len = cfg_payload_len;
 
 	ret = io_uring_register_buffers(&ring, &iov, 1);
 	if (ret)
-		error(1, ret, "io_uring: buffer registration");
+		error(1, -ret, "io_uring: buffer registration");
 
 	tstop = gettimeofday_ms() + cfg_runtime_ms;
 	do {
···
 
 		ret = io_uring_submit(&ring);
 		if (ret != cfg_nr_reqs)
-			error(1, ret, "submit");
+			error(1, -ret, "submit");
 
 		if (cfg_cork)
 			do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0);
 		for (i = 0; i < cfg_nr_reqs; i++) {
 			ret = io_uring_wait_cqe(&ring, &cqe);
 			if (ret)
-				error(1, ret, "wait cqe");
+				error(1, -ret, "wait cqe");
 
 			if (cqe->user_data != NONZC_TAG &&
 			    cqe->user_data != ZC_TAG)
-				error(1, -EINVAL, "invalid cqe->user_data");
+				error(1, EINVAL, "invalid cqe->user_data");
 
 			if (cqe->flags & IORING_CQE_F_NOTIF) {
 				if (cqe->flags & IORING_CQE_F_MORE)
-					error(1, -EINVAL, "invalid notif flags");
+					error(1, EINVAL, "invalid notif flags");
 				if (compl_cqes <= 0)
-					error(1, -EINVAL, "notification mismatch");
+					error(1, EINVAL, "notification mismatch");
 				compl_cqes--;
 				i--;
 				io_uring_cqe_seen(&ring);
···
 			}
 			if (cqe->flags & IORING_CQE_F_MORE) {
 				if (cqe->user_data != ZC_TAG)
-					error(1, cqe->res, "unexpected F_MORE");
+					error(1, -cqe->res, "unexpected F_MORE");
 				compl_cqes++;
 			}
 			if (cqe->res >= 0) {
 				packets++;
 				bytes += cqe->res;
 			} else if (cqe->res != -EAGAIN) {
-				error(1, cqe->res, "send failed");
+				error(1, -cqe->res, "send failed");
 			}
 			io_uring_cqe_seen(&ring);
 		}
···
 	while (compl_cqes) {
 		ret = io_uring_wait_cqe(&ring, &cqe);
 		if (ret)
-			error(1, ret, "wait cqe");
+			error(1, -ret, "wait cqe");
 		if (cqe->flags & IORING_CQE_F_MORE)
-			error(1, -EINVAL, "invalid notif flags");
+			error(1, EINVAL, "invalid notif flags");
 		if (!(cqe->flags & IORING_CQE_F_NOTIF))
-			error(1, -EINVAL, "missing notif flag");
+			error(1, EINVAL, "missing notif flag");
 
 		io_uring_cqe_seen(&ring);
 		compl_cqes--;