From patchwork Tue Apr 5 07:22:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557911 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9E84C46467 for ; Tue, 5 Apr 2022 08:37:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233089AbiDEIiZ (ORCPT ); Tue, 5 Apr 2022 04:38:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34686 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237956AbiDEISe (ORCPT ); Tue, 5 Apr 2022 04:18:34 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAB6CB821D; Tue, 5 Apr 2022 01:07:49 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 83336617EE; Tue, 5 Apr 2022 08:07:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90FE6C385A1; Tue, 5 Apr 2022 08:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649146068; bh=y+dar7JCW4XERL+1xxtW86hKLcwtyN/Rw9l7lfqSf5s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uYJV8jRNvYG1pbJjafeRnCl1e6xIZIKyw9a1yaLSnFRMrJMz4yUvs2wFrM/0AyiUi DB54fuTEWE1IMsgTAZvNIGE9PPfB6I+2xdWXh3nT5DmNQj4lyNnzAM8yqrXJnMpcTL XQihK4gWVimd6U1C8U2UoPCDUqVRhqvKbBwD7gP0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lorenzo Bianconi , Felix Fietkau , Sasha Levin Subject: [PATCH 5.17 0593/1126] mt76: do not always copy ethhdr in reverse_frag0_hdr_trans Date: Tue, 5 Apr 2022 09:22:20 +0200 Message-Id: <20220405070425.040301065@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070407.513532867@linuxfoundation.org> References: <20220405070407.513532867@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Lorenzo Bianconi [ Upstream commit eea7437e80216ac29a87b417896ce75656816b56 ] Do not always copy ethernet header in mt{7615,7915,7921}_reverse_frag0_hdr_trans and use a pointer instead. Signed-off-by: Lorenzo Bianconi Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- .../net/wireless/mediatek/mt76/mt7615/mac.c | 19 +++++++++---------- .../net/wireless/mediatek/mt76/mt7915/mac.c | 19 +++++++++---------- .../net/wireless/mediatek/mt76/mt7921/mac.c | 19 +++++++++---------- 3 files changed, 27 insertions(+), 30 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c index 6d0ff5af8fec..21941e7873d8 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c @@ -253,12 +253,12 @@ static void mt7615_mac_fill_tm_rx(struct mt7615_phy *phy, __le32 *rxv) static int mt7615_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; + struct ethhdr *eth_hdr = (struct ethhdr *)(skb->data + hdr_gap); struct mt7615_sta *msta = (struct mt7615_sta *)status->wcid; + __le32 *rxd = (__le32 *)skb->data; struct ieee80211_sta *sta; struct ieee80211_vif *vif; struct ieee80211_hdr hdr; - struct ethhdr eth_hdr; - __le32 *rxd = (__le32 *)skb->data; __le32 qos_ctrl, ht_ctrl; if (FIELD_GET(MT_RXD1_NORMAL_ADDR_TYPE, le32_to_cpu(rxd[1])) != @@ -275,7 +275,6 @@ static int mt7615_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) vif = container_of((void *)msta->vif, struct ieee80211_vif, drv_priv); /* store the info from RXD and ethhdr to avoid being overridden */ - memcpy(ð_hdr, skb->data + hdr_gap, sizeof(eth_hdr)); hdr.frame_control = FIELD_GET(MT_RXD4_FRAME_CONTROL, rxd[4]); hdr.seq_ctrl = FIELD_GET(MT_RXD6_SEQ_CTRL, rxd[6]); qos_ctrl = FIELD_GET(MT_RXD6_QOS_CTL, rxd[6]); @@ -290,24 +289,24 @@ static int mt7615_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) ether_addr_copy(hdr.addr3, vif->bss_conf.bssid); break; case IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_source); break; case IEEE80211_FCTL_TODS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); break; case IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); - ether_addr_copy(hdr.addr4, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); + ether_addr_copy(hdr.addr4, eth_hdr->h_source); break; default: break; } skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2); - if (eth_hdr.h_proto == htons(ETH_P_AARP) || - eth_hdr.h_proto == htons(ETH_P_IPX)) + if (eth_hdr->h_proto == cpu_to_be16(ETH_P_AARP) || + eth_hdr->h_proto == cpu_to_be16(ETH_P_IPX)) ether_addr_copy(skb_push(skb, ETH_ALEN), bridge_tunnel_header); - else if (eth_hdr.h_proto >= htons(ETH_P_802_3_MIN)) + else if (eth_hdr->h_proto >= cpu_to_be16(ETH_P_802_3_MIN)) ether_addr_copy(skb_push(skb, ETH_ALEN), rfc1042_header); else skb_pull(skb, 2); diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index d18a2e93cff5..bca340cf8dcc 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -391,12 +391,12 @@ mt7915_mac_decode_he_radiotap(struct sk_buff *skb, __le32 *rxv, u32 mode) static int mt7915_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; + struct ethhdr *eth_hdr = (struct ethhdr *)(skb->data + hdr_gap); struct mt7915_sta *msta = (struct mt7915_sta *)status->wcid; + __le32 *rxd = (__le32 *)skb->data; struct ieee80211_sta *sta; struct ieee80211_vif *vif; struct ieee80211_hdr hdr; - struct ethhdr eth_hdr; - __le32 *rxd = (__le32 *)skb->data; __le32 qos_ctrl, ht_ctrl; if (FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, le32_to_cpu(rxd[3])) != @@ -413,7 +413,6 @@ static int mt7915_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) vif = container_of((void *)msta->vif, struct ieee80211_vif, drv_priv); /* store the info from RXD and ethhdr to avoid being overridden */ - memcpy(ð_hdr, skb->data + hdr_gap, sizeof(eth_hdr)); hdr.frame_control = FIELD_GET(MT_RXD6_FRAME_CONTROL, rxd[6]); hdr.seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, rxd[8]); qos_ctrl = FIELD_GET(MT_RXD8_QOS_CTL, rxd[8]); @@ -428,24 +427,24 @@ static int mt7915_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) ether_addr_copy(hdr.addr3, vif->bss_conf.bssid); break; case IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_source); break; case IEEE80211_FCTL_TODS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); break; case IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); - ether_addr_copy(hdr.addr4, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); + ether_addr_copy(hdr.addr4, eth_hdr->h_source); break; default: break; } skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2); - if (eth_hdr.h_proto == htons(ETH_P_AARP) || - eth_hdr.h_proto == htons(ETH_P_IPX)) + if (eth_hdr->h_proto == cpu_to_be16(ETH_P_AARP) || + eth_hdr->h_proto == cpu_to_be16(ETH_P_IPX)) ether_addr_copy(skb_push(skb, ETH_ALEN), bridge_tunnel_header); - else if (eth_hdr.h_proto >= htons(ETH_P_802_3_MIN)) + else if (eth_hdr->h_proto >= cpu_to_be16(ETH_P_802_3_MIN)) ether_addr_copy(skb_push(skb, ETH_ALEN), rfc1042_header); else skb_pull(skb, 2); diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index c6a849ee817c..2b6bbe0682c0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -402,12 +402,12 @@ mt7921_mac_assoc_rssi(struct mt7921_dev *dev, struct sk_buff *skb) static int mt7921_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; + struct ethhdr *eth_hdr = (struct ethhdr *)(skb->data + hdr_gap); struct mt7921_sta *msta = (struct mt7921_sta *)status->wcid; + __le32 *rxd = (__le32 *)skb->data; struct ieee80211_sta *sta; struct ieee80211_vif *vif; struct ieee80211_hdr hdr; - struct ethhdr eth_hdr; - __le32 *rxd = (__le32 *)skb->data; __le32 qos_ctrl, ht_ctrl; if (FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, le32_to_cpu(rxd[3])) != @@ -424,7 +424,6 @@ static int mt7921_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) vif = container_of((void *)msta->vif, struct ieee80211_vif, drv_priv); /* store the info from RXD and ethhdr to avoid being overridden */ - memcpy(ð_hdr, skb->data + hdr_gap, sizeof(eth_hdr)); hdr.frame_control = FIELD_GET(MT_RXD6_FRAME_CONTROL, rxd[6]); hdr.seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, rxd[8]); qos_ctrl = FIELD_GET(MT_RXD8_QOS_CTL, rxd[8]); @@ -439,24 +438,24 @@ static int mt7921_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) ether_addr_copy(hdr.addr3, vif->bss_conf.bssid); break; case IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_source); break; case IEEE80211_FCTL_TODS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); break; case IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS: - ether_addr_copy(hdr.addr3, eth_hdr.h_dest); - ether_addr_copy(hdr.addr4, eth_hdr.h_source); + ether_addr_copy(hdr.addr3, eth_hdr->h_dest); + ether_addr_copy(hdr.addr4, eth_hdr->h_source); break; default: break; } skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2); - if (eth_hdr.h_proto == htons(ETH_P_AARP) || - eth_hdr.h_proto == htons(ETH_P_IPX)) + if (eth_hdr->h_proto == cpu_to_be16(ETH_P_AARP) || + eth_hdr->h_proto == cpu_to_be16(ETH_P_IPX)) ether_addr_copy(skb_push(skb, ETH_ALEN), bridge_tunnel_header); - else if (eth_hdr.h_proto >= htons(ETH_P_802_3_MIN)) + else if (eth_hdr->h_proto >= cpu_to_be16(ETH_P_802_3_MIN)) ether_addr_copy(skb_push(skb, ETH_ALEN), rfc1042_header); else skb_pull(skb, 2);