[dpdk-dev] [PATCH v2] net/hns3: fix parse link fails code fail

["Min Hu (Connor)" <humin29@huawei.com>]

From: Chengwen Feng <fengchengwen@huawei.com>

The link fails code should be parsed using the structure
hns3_mbx_vf_to_pf_cmd, else it will parse fail.

Fixes: 109e4dd1bd7a ("net/hns3: get link state change through mailbox")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
v2:
* kept original API interface.
---
 drivers/net/hns3/hns3_mbx.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c
index eb202dd..755298f 100644
--- a/drivers/net/hns3/hns3_mbx.c
+++ b/drivers/net/hns3/hns3_mbx.c
@@ -346,12 +346,20 @@ hns3_link_fail_parse(struct hns3_hw *hw, uint8_t link_fail_code)
 }
 
 static void
+
 hns3pf_handle_link_change_event(struct hns3_hw *hw,
-			      struct hns3_mbx_pf_to_vf_cmd *req)
+				struct hns3_mbx_pf_to_vf_cmd *cmd)
 {
 #define LINK_STATUS_OFFSET     1
 #define LINK_FAIL_CODE_OFFSET  2
 
+	/*
+	 * This message is reported by the firmware and is reported in
+	 * 'struct hns3_mbx_vf_to_pf_cmd' format. Therefore, we should cast
+	 * the cmd to 'struct hns3_mbx_vf_to_pf_cmd' first.
+	 */
+	struct hns3_mbx_vf_to_pf_cmd *req = (struct hns3_mbx_vf_to_pf_cmd *)cmd;
+
 	if (!req->msg[LINK_STATUS_OFFSET])
 		hns3_link_fail_parse(hw, req->msg[LINK_FAIL_CODE_OFFSET]);
 
-- 
2.7.4