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net: hns3: check msg_data before memcpy in hclgevf_send_mbx_msg 

The value of msg_data may be NULL in some cases, which will cause
errors reported by some compiler.

So this patch adds a check to fix it.

Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Weihang Li 2019-07-04 22:04:25 +08:00 committed by David S. Miller
parent c09ba48456
commit 0bae5cf25d
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
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@ -102,7 +102,8 @@ int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, u16 code, u16 subcode,
~HCLGE_MBX_NEED_RESP_BIT;
req->msg[0] = code;
req->msg[1] = subcode;
memcpy(&req->msg[2], msg_data, msg_len);
if (msg_data)
memcpy(&req->msg[2], msg_data, msg_len);
/* synchronous send */
if (need_resp) {