linux-kernel - [PATCH] net: dsa: felix: use kmemdup() to replace kmalloc + memcpy

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Message-Id: <20211207064419.38632-1-hanyihao@vivo.com>
Date:   Mon,  6 Dec 2021 22:44:18 -0800
From:   Yihao Han <hanyihao@...o.com>
To:     Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kernel@...o.com, Yihao Han <hanyihao@...o.com>
Subject: [PATCH] net: dsa: felix: use kmemdup() to replace kmalloc + memcpy

Fix following coccicheck warning:
/drivers/net/dsa/ocelot/felix_vsc9959.c:1627:13-20:
WARNING opportunity for kmemdup
/drivers/net/dsa/ocelot/felix_vsc9959.c:1506:16-23:
WARNING opportunity for kmemdup

Signed-off-by: Yihao Han <hanyihao@...o.com>
---
 drivers/net/dsa/ocelot/felix_vsc9959.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 9add86eda7e3..0076420308a7 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1503,12 +1503,10 @@ static int vsc9959_stream_table_add(struct ocelot *ocelot,
 	struct felix_stream *stream_entry;
 	int ret;
 
-	stream_entry = kzalloc(sizeof(*stream_entry), GFP_KERNEL);
+	stream_entry = kmemdup(stream, sizeof(*stream_entry), GFP_KERNEL);
 	if (!stream_entry)
 		return -ENOMEM;
 
-	memcpy(stream_entry, stream, sizeof(*stream_entry));
-
 	if (!stream->dummy) {
 		ret = vsc9959_mact_stream_set(ocelot, stream_entry, extack);
 		if (ret) {
@@ -1624,11 +1622,10 @@ static int vsc9959_psfp_sfi_list_add(struct ocelot *ocelot,
 	struct felix_stream_filter *sfi_entry;
 	int ret;
 
-	sfi_entry = kzalloc(sizeof(*sfi_entry), GFP_KERNEL);
+	sfi_entry = kmemdup(sfi, sizeof(*sfi_entry), GFP_KERNEL);
 	if (!sfi_entry)
 		return -ENOMEM;
 
-	memcpy(sfi_entry, sfi, sizeof(*sfi_entry));
 	refcount_set(&sfi_entry->refcount, 1);
 
 	ret = vsc9959_psfp_sfi_set(ocelot, sfi_entry);
-- 
2.17.1