drivers/net/wireless/p54: 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, 2 deletions

diff --git a/drivers/net/wireless/p54/p54usb.c b/drivers/net/wireless/p54/p54usb.c
index d5b197b4d5bb..a06862130703 100644
--- a/drivers/net/wireless/p54/p54usb.c
+++ b/drivers/net/wireless/p54/p54usb.c
@@ -433,10 +433,9 @@ static int p54u_firmware_reset_3887(struct ieee80211_hw *dev)
         u8 *buf;
         int ret;
 
-        buf = kmalloc(4, GFP_KERNEL);
+        buf = kmemdup(p54u_romboot_3887, 4, GFP_KERNEL);
         if (!buf)
                 return -ENOMEM;
-        memcpy(buf, p54u_romboot_3887, 4);
         ret = p54u_bulk_msg(priv, P54U_PIPE_DATA,
                             buf, 4);
         kfree(buf);