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>

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index fbb4c13..c89d6d7 100644 (file)
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/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),
@@ -696,56 +699,50 @@ 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));
+               memcpy(IEEE80211_SKB_RXCB(skb), &rx_status,
+                      sizeof(rx_status));
 
-                       if (is_broadcast_ether_addr(hdr->addr1)) {
-                               ;/*TODO*/
-                       } else if (is_multicast_ether_addr(hdr->addr1)) {
-                               ;/*TODO*/
-                       } else {
-                               unicast = true;
-                               rtlpriv->stats.rxbytesunicast += skb->len;
-                       }
+               if (is_broadcast_ether_addr(hdr->addr1)) {
+                       ;/*TODO*/
+               } else if (is_multicast_ether_addr(hdr->addr1)) {
+                       ;/*TODO*/
+               } else {
+                       unicast = true;
+                       rtlpriv->stats.rxbytesunicast += skb->len;
+               }
 
-                       rtl_is_special_data(hw, skb, false);
+               rtl_is_special_data(hw, skb, false);
 
-                       if (ieee80211_is_data(fc)) {
-                               rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
+               if (ieee80211_is_data(fc)) {
+                       rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 
-                               if (unicast)
-                                       rtlpriv->link_info.num_rx_inperiod++;
-                       }
+                       if (unicast)
+                               rtlpriv->link_info.num_rx_inperiod++;
+               }
 
-                       /* for sw lps */
-                       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) &&
-                            (ieee80211_is_beacon(fc) ||
-                            ieee80211_is_probe_resp(fc))) {
+               /* for sw lps */
+               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) &&
+                    (ieee80211_is_beacon(fc) ||
+                    ieee80211_is_probe_resp(fc))) {
+                       dev_kfree_skb_any(skb);
+               } else {
+                       if (unlikely(!rtl_action_proc(hw, skb, false))) {
                                dev_kfree_skb_any(skb);
                        } else {
-                               if (unlikely(!rtl_action_proc(hw, skb,
-                                   false))) {
-                                       dev_kfree_skb_any(skb);
-                               } else {
-                                       struct sk_buff *uskb = NULL;
-                                       u8 *pdata;
-                                       uskb = dev_alloc_skb(skb->len + 128);
-                                       memcpy(IEEE80211_SKB_RXCB(uskb),
-                                              &rx_status, sizeof(rx_status));
-                                       pdata = (u8 *)skb_put(uskb, skb->len);
-                                       memcpy(pdata, skb->data, skb->len);
-                                       dev_kfree_skb_any(skb);
-
-                                       ieee80211_rx_irqsafe(hw, uskb);
-                               }
+                               struct sk_buff *uskb = NULL;
+                               u8 *pdata;
+                               uskb = dev_alloc_skb(skb->len + 128);
+                               memcpy(IEEE80211_SKB_RXCB(uskb),
+                                      &rx_status, sizeof(rx_status));
+                               pdata = (u8 *)skb_put(uskb, skb->len);
+                               memcpy(pdata, skb->data, skb->len);
+                               dev_kfree_skb_any(skb);
+
+                               ieee80211_rx_irqsafe(hw, uskb);
                        }
-               } else {
-                       dev_kfree_skb_any(skb);
                }
 
                if (((rtlpriv->link_info.num_rx_inperiod +