iwlwifi: remove skb_linearize for rx frames

Remove skb_linearize() in the iwlwifi drivers since
mac80211 supports paged rx SKBs now.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 27 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 6b7201551ca7..2c16c5c10bc5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -548,7 +548,6 @@ static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
         struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
         u16 len = le16_to_cpu(rx_hdr->len);
         struct sk_buff *skb;
-        int ret;
         __le16 fc = hdr->frame_control;
 
         /* We received data from the HW, so stop the watchdog */
@@ -565,9 +564,9 @@ static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
                 return;
         }
 
-        skb = alloc_skb(IWL_LINK_HDR_MAX * 2, GFP_ATOMIC);
+        skb = dev_alloc_skb(128);
         if (!skb) {
-                IWL_ERR(priv, "alloc_skb failed\n");
+                IWL_ERR(priv, "dev_alloc_skb failed\n");
                 return;
         }
 
@@ -576,37 +575,13 @@ static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
                                        (struct ieee80211_hdr *)rxb_addr(rxb),
                                        le32_to_cpu(rx_end->status), stats);
 
-        skb_reserve(skb, IWL_LINK_HDR_MAX);
         skb_add_rx_frag(skb, 0, rxb->page,
                         (void *)rx_hdr->payload - (void *)pkt, len);
 
-        /* mac80211 currently doesn't support paged SKB. Convert it to
-         * linear SKB for management frame and data frame requires
-         * software decryption or software defragementation. */
-        if (ieee80211_is_mgmt(fc) ||
-            ieee80211_has_protected(fc) ||
-            ieee80211_has_morefrags(fc) ||
-            le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)
-                ret = skb_linearize(skb);
-        else
-                ret = __pskb_pull_tail(skb, min_t(u16, IWL_LINK_HDR_MAX, len)) ?
-                        0 : -ENOMEM;
-
-        if (ret) {
-                kfree_skb(skb);
-                goto out;
-        }
-
-        /*
-         * XXX: We cannot touch the page and its virtual memory (pkt) after
-         * here. It might have already been freed by the above skb change.
-         */
-
         iwl_update_stats(priv, false, fc, len);
         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 
         ieee80211_rx(priv->hw, skb);
- out:
         priv->alloc_rxb_page--;
         rxb->page = NULL;
 }