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

[Wei Yongjun]

From: Wei Yongjun <weiyongj...@huawei.com>

Use kmemdup rather than duplicating its implementation.

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

Signed-off-by: Wei Yongjun <weiyongj...@huawei.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);