Patch "net: hns3: refine the definition for struct hclge_pf_to_vf_msg" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    net: hns3: refine the definition for struct hclge_pf_to_vf_msg

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-hns3-refine-the-definition-for-struct-hclge_pf_t.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f48c35bc49a6e8d7e8871cb8ae767b7974bc494a
Author: Jian Shen <shenjian15@xxxxxxxxxx>
Date:   Tue Apr 19 11:27:03 2022 +0800

    net: hns3: refine the definition for struct hclge_pf_to_vf_msg
    
    [ Upstream commit 6fde96df0447a29ab785de4fcb229e5543f0cbf7 ]
    
    The struct hclge_pf_to_vf_msg is used for mailbox message from
    PF to VF, including both response and request. But its definition
    can only indicate respone, which makes the message data copy in
    function hclge_send_mbx_msg() unreadable. So refine it by edding
    a general message definition into it.
    
    Signed-off-by: Jian Shen <shenjian15@xxxxxxxxxx>
    Signed-off-by: Guangbin Huang <huangguangbin2@xxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Stable-dep-of: ac92c0a9a060 ("net: hns3: add barrier in vf mailbox reply process")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h b/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
index c2bd2584201f8..c4603a70ed60b 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h
@@ -132,10 +132,19 @@ struct hclge_vf_to_pf_msg {
 
 struct hclge_pf_to_vf_msg {
 	u16 code;
-	u16 vf_mbx_msg_code;
-	u16 vf_mbx_msg_subcode;
-	u16 resp_status;
-	u8 resp_data[HCLGE_MBX_MAX_RESP_DATA_SIZE];
+	union {
+		/* used for mbx response */
+		struct {
+			u16 vf_mbx_msg_code;
+			u16 vf_mbx_msg_subcode;
+			u16 resp_status;
+			u8 resp_data[HCLGE_MBX_MAX_RESP_DATA_SIZE];
+		};
+		/* used for general mbx */
+		struct {
+			u8 msg_data[HCLGE_MBX_MAX_MSG_SIZE];
+		};
+	};
 };
 
 struct hclge_mbx_vf_to_pf_cmd {
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
index 4a5b11b6fed3f..dac4ac425481c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c
@@ -108,7 +108,7 @@ static int hclge_send_mbx_msg(struct hclge_vport *vport, u8 *msg, u16 msg_len,
 	resp_pf_to_vf->msg_len = msg_len;
 	resp_pf_to_vf->msg.code = mbx_opcode;
 
-	memcpy(&resp_pf_to_vf->msg.vf_mbx_msg_code, msg, msg_len);
+	memcpy(resp_pf_to_vf->msg.msg_data, msg, msg_len);
 
 	trace_hclge_pf_mbx_send(hdev, resp_pf_to_vf);