linux-kernel - [PATCH -next] hinic: Use kmemdup instead of kzalloc and memcpy

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Date:   Wed, 29 Apr 2020 11:35:28 +0800
From:   Zou Wei <zou_wei@...wei.com>
To:     <aviad.krawczyk@...wei.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Zou Wei <zou_wei@...wei.com>
Subject: [PATCH -next] hinic: Use kmemdup instead of kzalloc and memcpy

Fixes coccicheck warnings:

 drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c:452:17-24: WARNING opportunity for kmemdup
 drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c:458:23-30: WARNING opportunity for kmemdup

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zou Wei <zou_wei@...wei.com>
---
 drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c
index f8626df..a39cc16 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c
@@ -449,18 +449,15 @@ static void recv_mbox_handler(struct hinic_mbox_func_to_func *func_to_func,
 		return;
 	}
 
-	rcv_mbox_temp = kzalloc(sizeof(*rcv_mbox_temp), GFP_KERNEL);
+	rcv_mbox_temp = kmemdup(recv_mbox, sizeof(*rcv_mbox_temp), GFP_KERNEL);
 	if (!rcv_mbox_temp)
 		return;
 
-	memcpy(rcv_mbox_temp, recv_mbox, sizeof(*rcv_mbox_temp));
-
-	rcv_mbox_temp->mbox = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
+	rcv_mbox_temp->mbox = kmemdup(recv_mbox->mbox, MBOX_MAX_BUF_SZ,
+				      GFP_KERNEL);
 	if (!rcv_mbox_temp->mbox)
 		goto err_alloc_rcv_mbox_msg;
 
-	memcpy(rcv_mbox_temp->mbox, recv_mbox->mbox, MBOX_MAX_BUF_SZ);
-
 	rcv_mbox_temp->buf_out = kzalloc(MBOX_MAX_BUF_SZ, GFP_KERNEL);
 	if (!rcv_mbox_temp->buf_out)
 		goto err_alloc_rcv_mbox_buf;
-- 
2.6.2