linux-kernel - [PATCH] media: usb: Use kmemdup instead of duplicating its function.

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Message-ID: <1537284325-61744-1-git-send-email-zhongjiang@huawei.com>
Date:   Tue, 18 Sep 2018 23:25:25 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <mchehab@...nel.org>
CC:     <crope@....fi>, <linux-media@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] media: usb: Use kmemdup instead of duplicating its function.

kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 drivers/media/usb/dvb-usb-v2/gl861.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/usb/dvb-usb-v2/gl861.c b/drivers/media/usb/dvb-usb-v2/gl861.c
index 0559417..80fed44 100644
--- a/drivers/media/usb/dvb-usb-v2/gl861.c
+++ b/drivers/media/usb/dvb-usb-v2/gl861.c
@@ -200,11 +200,10 @@ struct friio_config {
 	u8 *buf;
 	int ret;
 
-	buf = kmalloc(wlen, GFP_KERNEL);
+	buf = kmemdup(wbuf, wlen, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 
-	memcpy(buf, wbuf, wlen);
 	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 				 GL861_REQ_I2C_RAW, GL861_WRITE,
 				 addr << (8 + 1), 0x0100, buf, wlen, 2000);
-- 
1.7.12.4