drivers/net/wireless/ath/ath9k: 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: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 77b359162d6c..3bd66220604f 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -907,12 +907,10 @@ static void ath9k_hif_usb_reboot(struct usb_device *udev)
         void *buf;
         int ret;
 
-        buf = kmalloc(4, GFP_KERNEL);
+        buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
         if (!buf)
                 return;
 
-        memcpy(buf, &reboot_cmd, 4);
-
         ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
                            buf, 4, NULL, HZ);
         if (ret)