w1: ds2490: use kmemdup rather than duplicating its implementation

Use kmemdup rather than duplicating its implementation.

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

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 59d74d1b47a88d82c54ee843ee368c7120150c41..be77b7914fad46aa11dd9184a5ddafeb2b762bab 100644 (file)
--- 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);