rtlwifi: Resubmit skbs with bad CRC early

Once we realize a bad packet was received, don't
waste time unmapping it, freeing it, then allocation
a new skb and mapping it, just resubmit the existing
skb.
Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/pci.c

@@ -669,6 +669,9 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 						 &rx_status,
 						 (u8 *) pdesc, skb);
 
+		if (stats.crc || stats.hwerror)
+			goto done;
+
 		new_skb = dev_alloc_skb(rtlpci->rxbuffersize);
 		if (unlikely(!new_skb)) {
 			RT_TRACE(rtlpriv, (COMP_INTR | COMP_RECV),
@@ -696,7 +699,6 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 		hdr = rtl_get_hdr(skb);
 		fc = rtl_get_fc(skb);
 
-		if (!stats.crc && !stats.hwerror) {
 		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status,
 		       sizeof(rx_status));
 
@@ -722,14 +724,12 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 		rtl_swlps_beacon(hw, (void *)skb->data, skb->len);
 		rtl_recognize_peer(hw, (void *)skb->data, skb->len);
 		if ((rtlpriv->mac80211.opmode == NL80211_IFTYPE_AP) &&
-			    (rtlpriv->rtlhal.current_bandtype ==
-			     BAND_ON_2_4G) &&
+		    (rtlpriv->rtlhal.current_bandtype == BAND_ON_2_4G) &&
 		     (ieee80211_is_beacon(fc) ||
 		     ieee80211_is_probe_resp(fc))) {
 			dev_kfree_skb_any(skb);
 		} else {
-				if (unlikely(!rtl_action_proc(hw, skb,
-				    false))) {
+			if (unlikely(!rtl_action_proc(hw, skb, false))) {
 				dev_kfree_skb_any(skb);
 			} else {
 				struct sk_buff *uskb = NULL;
@@ -744,9 +744,6 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 				ieee80211_rx_irqsafe(hw, uskb);
 			}
 		}
-		} else {
-			dev_kfree_skb_any(skb);
-		}
 
 		if (((rtlpriv->link_info.num_rx_inperiod +
 			rtlpriv->link_info.num_tx_inperiod) > 8) ||