linux-kernel - [PATCH] selftests/xsk: Fix unsigned comparison with less than zero

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Message-ID: <20221105110443.23872-1-yuehaibing@huawei.com>
Date:   Sat, 5 Nov 2022 19:04:43 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <bjorn@...nel.org>, <magnus.karlsson@...el.com>,
        <maciej.fijalkowski@...el.com>, <jonathan.lemon@...il.com>,
        <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <martin.lau@...ux.dev>, <song@...nel.org>, <yhs@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>, <sdf@...gle.com>,
        <haoluo@...gle.com>, <jolsa@...nel.org>, <mykolal@...com>,
        <shuah@...nel.org>, <shibin.koikkara.reeny@...el.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH] selftests/xsk: Fix unsigned comparison with less than zero

poll() may return negative on error, 'ret' should be int.

Fixes: 3143d10b0945 ("selftests/xsk: Update poll test cases")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 tools/testing/selftests/bpf/xskxceiver.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 681a5db80dae..162d3a516f2c 100644
--- 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) {
-- 
2.17.1