From: Min Hu (Connor) Date: Thu, 28 Oct 2021 11:52:30 +0000 (+0800) Subject: net/hns3: fix mailbox communication with HW X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=599ef84add7ed02537ff43a8e8a36f42b36e107e;p=dpdk.git net/hns3: fix mailbox communication with HW Mailbox is the communication mechanism between SW and HW. There exist two approaches for SW to recognize mailbox message from HW. One way is using match_id, the other is to compare the message code. The two approaches are independent and used in different scenarios. But for the second approach, "next_to_use" should be updated and written to HW register. If it not done, HW do not know the position SW steps, then, the communication between SW and HW will turn to be failed. Fixes: dbbbad23e380 ("net/hns3: fix VF handling LSC event in secondary process") Cc: stable@dpdk.org Signed-off-by: Min Hu (Connor) --- diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c index a47622b8a6..245652e2ed 100644 --- a/drivers/net/hns3/hns3_mbx.c +++ b/drivers/net/hns3/hns3_mbx.c @@ -435,6 +435,9 @@ hns3_handle_mbx_msg_out_intr(struct hns3_hw *hw) scan_next: next_to_use = (next_to_use + 1) % hw->cmq.crq.desc_num; } + + crq->next_to_use = next_to_use; + hns3_write_dev(hw, HNS3_CMDQ_RX_HEAD_REG, crq->next_to_use); } void