From patchwork Thu Aug 4 01:07:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 595508 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 DFA9BC19F29 for ; Thu, 4 Aug 2022 01:08:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238924AbiHDBIE (ORCPT ); Wed, 3 Aug 2022 21:08:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236360AbiHDBIC (ORCPT ); Wed, 3 Aug 2022 21:08:02 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6986D40BD8 for ; Wed, 3 Aug 2022 18:07:55 -0700 (PDT) X-UUID: 72c6e1a255e846e6bf7f1fff3df857e4-20220804 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=ShN5Al7J98eU+m9SLdyQUvLe6L2xd8dZtVuQ/xF+kFs=; b=lIwB2IVFrVkCRl9JQ2lW1zazaouOmmbHeL7p3/2A0WxwaIRhbeqA51eBwpHhf4AJASA8zp945x/NgQiwuWT+xr7X1rDzaHcfqYdBPjmDGLLfqC2qRdkCf/sYzZlR/cCPkUZakhwLY3wvK3dSrZD4zUkCtLKbEAcO6czVr4sxt1M=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8, REQID:11499bf4-708a-4049-8258-b7213881c0e2, OB:10, L OB:20,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Release_Ham,A CTION:release,TS:100 X-CID-INFO: VERSION:1.1.8, REQID:11499bf4-708a-4049-8258-b7213881c0e2, OB:10, LOB :20,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Spam_GS981B3D,A CTION:quarantine,TS:100 X-CID-META: VersionHash:0f94e32, CLOUDID:da7739d0-a6cf-4fb6-be1b-c60094821ca2, C OID:a6890e36c514,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:1,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: 72c6e1a255e846e6bf7f1fff3df857e4-20220804 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1970289718; Thu, 04 Aug 2022 09:07:48 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 4 Aug 2022 09:07:46 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Thu, 4 Aug 2022 09:07:46 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , "Deren Wu" Subject: [PATCH v2] mt76: mt7921: fix antenna signal are way off in monitor mode Date: Thu, 4 Aug 2022 09:07:45 +0800 Message-ID: <0f95fcdb8511ec765040c8fe85c1fa09437e8ef5.1659574985.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Sean Wang Group 3 in RxD is disabled in monitor mode. We should use the group 5 in RxD instead to fix antenna signal way off issue, e.g we would see the incorrect antenna signal value in wireshark. On the other hand, Group 5 wouldn't be used in STA or AP mode, so the patch shouldn't cause any harm to those modes. Fixes: cbaa0a404f8d ("mt76: mt7921: fix up the monitor mode") Reported-by: Adrian Granados Co-developed-by: Deren Wu Signed-off-by: Deren Wu Signed-off-by: Sean Wang --- v2: drop an unnecessary blank line and fix typo --- .../net/wireless/mediatek/mt76/mt7921/mac.c | 32 ++++++++++++------- 1 file changed, 21 insertions(+), 11 deletions(-) status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1); @@ -408,17 +429,6 @@ mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb) status->signal = max(status->signal, status->chain_signal[i]); } - - ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband, - rxv, &mode); - if (ret < 0) - return ret; - - if (rxd1 & MT_RXD1_NORMAL_GROUP_5) { - rxd += 18; - if ((u8 *)rxd - skb->data >= skb->len) - return -EINVAL; - } } amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4); diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index 47f0aa81ab02..1c242f2ae997 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -394,6 +394,27 @@ mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb) if (v0 & MT_PRXV_HT_AD_CODE) status->enc_flags |= RX_ENC_FLAG_LDPC; + ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband, + rxv, &mode); + if (ret < 0) + return ret; + + if (rxd1 & MT_RXD1_NORMAL_GROUP_5) { + rxd += 6; + if ((u8 *)rxd - skb->data >= skb->len) + return -EINVAL; + + rxv = rxd; + /* Monitor mode would use RCPI described in GROUP 5 + * instead. + */ + v1 = le32_to_cpu(rxv[0]); + + rxd += 12; + if ((u8 *)rxd - skb->data >= skb->len) + return -EINVAL; + } + status->chains = mphy->antenna_mask; status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);