drivers/net/wireless/wl12xx: 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>

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -576,16 +576,14 @@ static int wl1271_fetch_nvs(struct wl1271 *wl)
 		goto out;
 	}
 
-	wl->nvs = kzalloc(sizeof(struct wl1271_nvs_file), GFP_KERNEL);
+	wl->nvs = kmemdup(fw->data, sizeof(struct wl1271_nvs_file), GFP_KERNEL);
 
 	if (!wl->nvs) {
 		wl1271_error("could not allocate memory for the nvs file");
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	memcpy(wl->nvs, fw->data, fw->size);
-
 out:
 	release_firmware(fw);
 
@@ -2350,15 +2348,13 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 		goto err_hw_alloc;
 	}
 
-	plat_dev = kmalloc(sizeof(wl1271_device), GFP_KERNEL);
+	plat_dev = kmemdup(&wl1271_device, sizeof(wl1271_device), GFP_KERNEL);
 	if (!plat_dev) {
 		wl1271_error("could not allocate platform_device");
 		ret = -ENOMEM;
 		goto err_plat_alloc;
 	}
 
-	memcpy(plat_dev, &wl1271_device, sizeof(wl1271_device));
-
 	wl = hw->priv;
 	memset(wl, 0, sizeof(*wl));