From patchwork Fri Sep 16 22:46:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 12978864 X-Patchwork-Delegate: nbd@nbd.name 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 3284AECAAA1 for ; Fri, 16 Sep 2022 22:46:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229566AbiIPWq5 (ORCPT ); Fri, 16 Sep 2022 18:46:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56530 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229498AbiIPWqz (ORCPT ); Fri, 16 Sep 2022 18:46:55 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 713C3E20 for ; Fri, 16 Sep 2022 15:46:54 -0700 (PDT) X-UUID: b546db002b4f4c3abc19b9b4a6e7584a-20220917 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=EnE1DpBt00fr09eib0oxcLVmLK6pfdjmd1P/7LoLDp8=; b=ccy3FxqQr50mvdqema9Nm9XsKwQC5nTQ1eV96kT1Fvfw3/JqJG0teW0rtkiZKab3jNEYS/8vDGBkB4wMDCoNb3e2OUgMCjBzSP72yVdfJsryUkCEQgL+YRs2qmF7pN9smi5IhUclFizidTftyYVT0CGSo9QHdN5blzfCeal028U=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.11,REQID:2a69defb-29b8-4c4d-84db-7b65ab20f864,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.11,REQID:2a69defb-29b8-4c4d-84db-7b65ab20f864,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:39a5ff1,CLOUDID:03bdf05d-5ed4-4e28-8b00-66ed9f042fbd,B ulkID:220917064651LD5YIWDH,BulkQuantity:0,Recheck:0,SF:28|17|19|48|823|824 ,TC:nil,Content:0,EDM:-3,IP:nil,URL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil, COL:0 X-UUID: b546db002b4f4c3abc19b9b4a6e7584a-20220917 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1389867685; Sat, 17 Sep 2022 06:46:48 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Sat, 17 Sep 2022 06:46:47 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Sat, 17 Sep 2022 06:46:47 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , "Deren Wu" Subject: [PATCH v4] wifi: mt76: mt7921: fix antenna signal are way off in monitor mode Date: Sat, 17 Sep 2022 06:46:45 +0800 Message-ID: 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 v3: I didn't find wrapped line, just rebase and resend to see if it can properly show in patchwork. v4: add wifi in the prefix --- .../net/wireless/mediatek/mt76/mt7921/mac.c | 32 ++++++++++++------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index e4868c492bc0..8de5e36a3780 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); 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);