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>
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 6b72015..2c16c5c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -548,7 +548,6 @@
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 @@
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 @@
(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;
}