linux-kernel - [PATCH net-next] xsk: Return -EINVAL instead of -EBUSY after xsk_get_pool_from

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Message-ID: <20210602031001.18656-1-wanghai38@huawei.com>
Date:   Wed, 2 Jun 2021 11:10:01 +0800
From:   Wang Hai <wanghai38@...wei.com>
To:     <bjorn@...nel.org>, <magnus.karlsson@...el.com>,
        <jonathan.lemon@...il.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
        <hawk@...nel.org>, <john.fastabend@...il.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH net-next] xsk: Return -EINVAL instead of -EBUSY after xsk_get_pool_from_qid() fails

xsk_get_pool_from_qid() fails not because the device's queues are busy,
but because the queue_id exceeds the current number of queues.
So when it fails, it is better to return -EINVAL instead of -EBUSY.

Signed-off-by: Wang Hai <wanghai38@...wei.com>
---
 net/xdp/xsk_buff_pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 8de01aaac4a0..30ece117117a 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -135,7 +135,7 @@ int xp_assign_dev(struct xsk_buff_pool *pool,
 		return -EINVAL;
 
 	if (xsk_get_pool_from_qid(netdev, queue_id))
-		return -EBUSY;
+		return -EINVAL;
 
 	pool->netdev = netdev;
 	pool->queue_id = queue_id;
-- 
2.17.1