linux-kernel - [PATCH -next] w1: ds2490: use kmemdup rather than duplicating its implementation

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Message-Id: <20170209154542.16315-1-weiyj.lk@gmail.com>
Date:   Thu,  9 Feb 2017 15:45:42 +0000
From:   Wei Yongjun <weiyj.lk@...il.com>
To:     Evgeniy Polyakov <zbr@...emap.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:     Wei Yongjun <weiyongjun1@...wei.com>, linux-kernel@...r.kernel.org
Subject: [PATCH -next] w1: ds2490: use kmemdup rather than duplicating its implementation

From: Wei Yongjun <weiyongjun1@...wei.com>

Use kmemdup rather than duplicating its implementation.

Generated by: scripts/coccinelle/api/memdup.cocci

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 drivers/w1/masters/ds2490.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 59d74d1..be77b79 100644
--- a/drivers/w1/masters/ds2490.c
+++ b/drivers/w1/masters/ds2490.c
@@ -909,11 +909,10 @@ static void ds9490r_write_block(void *data, const u8 *buf, int len)
 	if (len <= 0)
 		return;
 
-	tbuf = kmalloc(len, GFP_KERNEL);
+	tbuf = kmemdup(buf, len, GFP_KERNEL);
 	if (!tbuf)
 		return;
 
-	memcpy(tbuf, buf, len);
 	ds_write_block(dev, tbuf, len);
 
 	kfree(tbuf);