selftests/bpf: Fix u32 variable compared with less than zero

Variable ret is compared with less than zero even though it was set as u32.
So u32 to int conversion is needed.

Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20221105183656.86077-1-tegongkang@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 681a5db..162d3a5 100644 (file)
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -1006,7 +1006,8 @@ static int __send_pkts(struct ifobject *ifobject, u32 *pkt_nb, struct pollfd *fd
 {
        struct xsk_socket_info *xsk = ifobject->xsk;
        bool use_poll = ifobject->use_poll;
-       u32 i, idx = 0, ret, valid_pkts = 0;
+       u32 i, idx = 0, valid_pkts = 0;
+       int ret;
 
        while (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) < BATCH_SIZE) {
                if (use_poll) {