From patchwork Wed Mar 24 02:57:43 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Yi X-Patchwork-Id: 87798 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o2O2rkTr001506 for ; Wed, 24 Mar 2010 02:53:46 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754491Ab0CXCxp (ORCPT ); Tue, 23 Mar 2010 22:53:45 -0400 Received: from mga11.intel.com ([192.55.52.93]:19845 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754209Ab0CXCxo (ORCPT ); Tue, 23 Mar 2010 22:53:44 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 23 Mar 2010 19:50:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.51,298,1267430400"; d="scan'208";a="551575435" Received: from yzhu-mobl0.sh.intel.com (HELO localhost.localdomain) ([10.239.36.65]) by fmsmga002.fm.intel.com with ESMTP; 23 Mar 2010 19:52:26 -0700 From: Zhu Yi To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, Zhu Yi Subject: [PATCH 2/2] iwlwifi: remove skb_linearize for rx frames Date: Wed, 24 Mar 2010 10:57:43 +0800 Message-Id: <1269399463-5244-2-git-send-email-yi.zhu@intel.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1269399463-5244-1-git-send-email-yi.zhu@intel.com> References: <1269399463-5244-1-git-send-email-yi.zhu@intel.com> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Wed, 24 Mar 2010 02:53:46 +0000 (UTC) diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index e847e61..c2b907d 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -363,13 +363,6 @@ enum { #define DEF_CMD_PAYLOAD_SIZE 320 -/* - * IWL_LINK_HDR_MAX should include ieee80211_hdr, radiotap header, - * SNAP header and alignment. It should also be big enough for 802.11 - * control frames. - */ -#define IWL_LINK_HDR_MAX 64 - /** * struct iwl_device_cmd * diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index b6a64d8..05dd057 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c @@ -1075,7 +1075,6 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, struct ieee80211_rx_status *stats) { struct sk_buff *skb; - int ret = 0; __le16 fc = hdr->frame_control; /* We only process data packets if the interface is open */ @@ -1090,45 +1089,18 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) 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"); return; } - skb_reserve(skb, IWL_LINK_HDR_MAX); skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), 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 || - (ieee80211_is_data_qos(fc) && - *ieee80211_get_qos_ctl(hdr) & - IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)) - 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 (hdr) 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; }