rtlwifi: usb: remove extra skb copy on RX path

RX path has extra copying of packets, that can be avoided.
Signed-off-by: NJussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/usb.c

@@ -513,23 +513,12 @@ static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 			if (unicast)
 				rtlpriv->link_info.num_rx_inperiod++;
 		}
-		if (likely(rtl_action_proc(hw, skb, false))) {
-			struct sk_buff *uskb = NULL;
-			u8 *pdata;
-
-			uskb = dev_alloc_skb(skb->len + 128);
-			if (uskb) {	/* drop packet on allocation failure */
-				memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
-				       sizeof(rx_status));
-				pdata = (u8 *)skb_put(uskb, skb->len);
-				memcpy(pdata, skb->data, skb->len);
-				ieee80211_rx_irqsafe(hw, uskb);
-			}
-			dev_kfree_skb_any(skb);
-		} else {
+
+		if (likely(rtl_action_proc(hw, skb, false)))
+			ieee80211_rx_irqsafe(hw, skb);
+		else
 			dev_kfree_skb_any(skb);
 	}
-	}
 }
 
 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)