From mboxrd@z Thu Jan 1 00:00:00 1970 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 AD598C43217 for ; Wed, 19 Oct 2022 10:39:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231995AbiJSKj6 (ORCPT ); Wed, 19 Oct 2022 06:39:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232297AbiJSKjH (ORCPT ); Wed, 19 Oct 2022 06:39:07 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1ECE15626B; Wed, 19 Oct 2022 03:18:06 -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 ams.source.kernel.org (Postfix) with ESMTPS id 4A4DFB822D8; Wed, 19 Oct 2022 08:51:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6E80C433C1; Wed, 19 Oct 2022 08:51:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666169467; bh=mq8aG3PtaIpytEmkRarYYnE2UdSfF3zSy5rZl30dsz8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FwHvII86Pg6LdAFn/a6yjs+dgURQ5+7duyhvgHtzqtKxDnhMcTjPYBrPmWpDWsouG hb9sH+sXSKeHwe4G5vX2+a8Ex102p6eR7voyjYi6SPBA0SplU1m6oTa+Cvt3VjvoYA s9jHc0dCGNjf8nW8RJvAD25tDovrhmY7gdU/LmUQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, AngeloGioacchino Del Regno , Lorenzo Bianconi , Sean Wang , Felix Fietkau , Sasha Levin Subject: [PATCH 6.0 287/862] wifi: mt76: mt7921: add mt7921_mutex_acquire at mt7921_sta_set_decap_offload Date: Wed, 19 Oct 2022 10:26:14 +0200 Message-Id: <20221019083302.689314366@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sean Wang [ Upstream commit 59c20b91786d5f140ee7be2f24c242b5f8986046 ] 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 Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- 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) -- 2.35.1