40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
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From 4c2dcb5bd22a65d3b30ca64e5c96f67c3b9f5e7e Mon Sep 17 00:00:00 2001
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From: Chengwen Feng <fengchengwen@huawei.com>
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Date: Wed, 31 Mar 2021 18:01:41 +0800
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Subject: [PATCH 083/189] net/hns3: fix VF mailbox head field
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Currently, the VF mailbox synchronization communication is based on
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three fields: head/tail/lost, when head equals tail plus lost, it
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means the response is received successfully.
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The head field indicates the number of requests that are successfully
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sent. If the request sending fails, it should not be updated.
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This patch fix the above bug by roll back updates when the sending
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fails.
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Fixes: 463e748964f5 ("net/hns3: support mailbox")
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Cc: stable@dpdk.org
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Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
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Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
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---
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drivers/net/hns3/hns3_mbx.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c
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index b9190a1..7357d7f 100644
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--- a/drivers/net/hns3/hns3_mbx.c
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+++ b/drivers/net/hns3/hns3_mbx.c
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@@ -142,6 +142,7 @@ hns3_send_mbx_msg(struct hns3_hw *hw, uint16_t code, uint16_t subcode,
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hw->mbx_resp.head++;
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ret = hns3_cmd_send(hw, &desc, 1);
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if (ret) {
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+ hw->mbx_resp.head--;
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rte_spinlock_unlock(&hw->mbx_resp.lock);
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hns3_err(hw, "VF failed(=%d) to send mbx message to PF",
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ret);
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--
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2.7.4
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