drivers/net/wireless/libertas: 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>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index a0cb265e5816bacb6e91a3c3c90591dcdef4a90b..3678e532874fc0b30700105f7bf5916037a6552b 100644 (file)
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -613,16 +613,14 @@ static void if_usb_receive_fwload(struct urb *urb)
                return;
        }
 
-       syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
+       syncfwheader = kmemdup(skb->data + IPFIELD_ALIGN_OFFSET,
+                              sizeof(struct fwsyncheader), GFP_ATOMIC);
        if (!syncfwheader) {
                lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
                kfree_skb(skb);
                return;
        }
 
-       memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
-              sizeof(struct fwsyncheader));
-
        if (!syncfwheader->cmd) {
                lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
                lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",