diff mbox series

[07/10] net/hns3: fix VF mailbox head field wrong update

Message ID 1617184904-55349-8-git-send-email-humin29@huawei.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers
Series some bugfixes for hns3 PMD |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

humin (Q) March 31, 2021, 10:01 a.m. UTC 
  From: Chengwen Feng <fengchengwen@huawei.com>

Currently, the VF mailbox synchronization communication is based on
three fields: head/tail/lost, when head equals tail plus lost, it
means the response is received successfully.

The head field indicates the number of requests that are successfully
sent. If the request sending fails, it should not be updated.

This patch fix the above bug by roll back updates when the sending
fails.

Fixes: 463e748964f57 ("net/hns3: support mailbox")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_mbx.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c
index ad0b4e6..3ba65f1 100644
--- a/drivers/net/hns3/hns3_mbx.c
+++ b/drivers/net/hns3/hns3_mbx.c
@@ -142,6 +142,7 @@  hns3_send_mbx_msg(struct hns3_hw *hw, uint16_t code, uint16_t subcode,
 		hw->mbx_resp.head++;
 		ret = hns3_cmd_send(hw, &desc, 1);
 		if (ret) {
+			hw->mbx_resp.head--;
 			rte_spinlock_unlock(&hw->mbx_resp.lock);
 			hns3_err(hw, "VF failed(=%d) to send mbx message to PF",
 				 ret);