drivers/net/usb: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 5 deletions

diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
index 66c5e89326c1..31b73310ec77 100644
--- a/drivers/net/usb/asix.c
+++ b/drivers/net/usb/asix.c
@@ -224,10 +224,9 @@ static int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
                    cmd, value, index, size);
 
         if (data) {
-                buf = kmalloc(size, GFP_KERNEL);
+                buf = kmemdup(data, size, GFP_KERNEL);
                 if (!buf)
                         goto out;
-                memcpy(buf, data, size);
         }
 
         err = usb_control_msg(
diff --git a/drivers/net/usb/mcs7830.c b/drivers/net/usb/mcs7830.c
index 834d8cd3005d..a6281e3987b5 100644
--- a/drivers/net/usb/mcs7830.c
+++ b/drivers/net/usb/mcs7830.c
@@ -142,12 +142,10 @@ static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *
         int ret;
         void *buffer;
 
-        buffer = kmalloc(size, GFP_NOIO);
+        buffer = kmemdup(data, size, GFP_NOIO);
         if (buffer == NULL)
                 return -ENOMEM;
 
-        memcpy(buffer, data, size);
-
         ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
                               MCS7830_WR_BMREQ, 0x0000, index, buffer,
                               size, MCS7830_CTRL_TIMEOUT);