From patchwork Fri Jul 29 14:44:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 12932481 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 A1621C00144 for ; Fri, 29 Jul 2022 14:45:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235862AbiG2OpX (ORCPT ); Fri, 29 Jul 2022 10:45:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235283AbiG2OpW (ORCPT ); Fri, 29 Jul 2022 10:45:22 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31BB115831 for ; Fri, 29 Jul 2022 07:45:16 -0700 (PDT) X-UUID: 23a98cd47989462c90afb3fab26c6f2d-20220729 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:9a593e24-3106-432a-9357-e080fa0f06d7,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:0f94e32,CLOUDID:874abe24-a982-4824-82d2-9da3b6056c2a,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 23a98cd47989462c90afb3fab26c6f2d-20220729 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 211206583; Fri, 29 Jul 2022 22:45:09 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Fri, 29 Jul 2022 22:45:08 +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; Fri, 29 Jul 2022 22:45:08 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH RESEND v2 2/2] mt76: mt7921: add mt7921_mutex_acquire at mt7921_sta_set_decap_offload Date: Fri, 29 Jul 2022 22:44:57 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <6353fe62ebeb0f78aa34b40e9c1745061b229f6c.1659105379.git.objelf@gmail.com> References: <6353fe62ebeb0f78aa34b40e9c1745061b229f6c.1659105379.git.objelf@gmail.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Sean Wang Add mt7921_mutex_acquire at mt7921_[start, stop]_ap to fix the race with the context holding dev->muxtex and the driver might access the device in low power state. Fixes: 24299fc869f7 ("mt76: mt7921: enable rx header traslation offload") Tested-by: AngeloGioacchino Del Regno Acked-by: Lorenzo Bianconi Signed-off-by: Sean Wang --- drivers/net/wireless/mediatek/mt76/mt7921/main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c index 63fd33dcd3af..7214735011d0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c @@ -1404,6 +1404,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw, struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv; struct mt7921_dev *dev = mt7921_hw_dev(hw); + mt7921_mutex_acquire(dev); + if (enabled) set_bit(MT_WCID_FLAG_HDR_TRANS, &msta->wcid.flags); else @@ -1411,6 +1413,8 @@ static void mt7921_sta_set_decap_offload(struct ieee80211_hw *hw, mt76_connac_mcu_sta_update_hdr_trans(&dev->mt76, vif, &msta->wcid, MCU_UNI_CMD(STA_REC_UPDATE)); + + mt7921_mutex_release(dev); } #if IS_ENABLED(CONFIG_IPV6)