From patchwork Fri Mar 5 08:46:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryder Lee X-Patchwork-Id: 12117963 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14744C433DB for ; Fri, 5 Mar 2021 08:47:13 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AB37E64FD4 for ; Fri, 5 Mar 2021 08:47:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AB37E64FD4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=jhiXlGYMY+TV/myWx05GJlzDxuhUJ9+ySCi9Tggq0lE=; b=TbQ54G6r+/aF1ZSdpAYfgU33aq eyhLmsPGhNGKGvcPzWmI3qM2MQ27ShqA29F70jgKQf4UU3lH1tnMw42Cn0+tXNRubmsnK0z/DAwYN undHznauPwkjMffhDhC7ZVr1JXj2NwWO3m+dfwyjjrSDHjNSu4QbOI+3QSU19AV2RKaJCYlGKUhnG bRZNTNcqEi6C3YlrxdAdGfwx9M8NaYVIBN6UdBcG3T0qlco7CTaCJykA7udSWYBf48+YcpQZGzJA0 9o83rCcQ5AF6IKQSTTkhSLeQVYcM9jOHhNe6qE6NG/48rDNxEvT8LyVXxue3xr9WPlnjy/SwaMoLO 6J5HJvUg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lI66v-00E4sr-Ol; Fri, 05 Mar 2021 08:47:01 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lI66p-00E4pY-Uj for linux-mediatek@lists.infradead.org; Fri, 05 Mar 2021 08:47:00 +0000 X-UUID: 73147d98afd34fa39f05bfd317c7f5b4-20210305 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=4NMmkkXC9cZpxWsmFueHASIOqatrx3PeIkti4rX+7p0=; b=X3MwUTLmr5EoYF5Tx0RS7eh3CWBjcKL10LHAo+k+0PMwnsgVc8fC6tiHHBdHT/9SzbcCL+/KmVXvAmXVZ5nBC79ET09bGdt8VHIRBJ+7AD+/A/iv1wJKWZww/jhp3xK+w7ufBWBnJHPP+dCsJ1sModUUS99I1Vy4Hbuh5lljntY=; X-UUID: 73147d98afd34fa39f05bfd317c7f5b4-20210305 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 662081463; Fri, 05 Mar 2021 00:46:45 -0800 Received: from mtkmbs05n2.mediatek.inc (172.21.101.140) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 5 Mar 2021 00:46:44 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 5 Mar 2021 16:46:42 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 5 Mar 2021 16:46:42 +0800 From: Ryder Lee To: Felix Fietkau , Lorenzo Bianconi CC: Shayne Chen , , , Ryder Lee , Evelyn Tsai Subject: [PATCH] mt76: mt7915: fix possible deadlock while mt7915_register_ext_phy() Date: Fri, 5 Mar 2021 16:46:41 +0800 Message-ID: <96aaea810b92f701e74b27cf030f9ddced6f4a63.1614932804.git.ryder.lee@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210305_084656_659835_82C96960 X-CRM114-Status: GOOD ( 11.58 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org ieee80211_register_hw() is called with rtnl_lock held, and this could be caused lockdep from a work item that's on a workqueue that is flushed with the rtnl held. Move mt7915_register_ext_phy() outside the init_work(). Signed-off-by: Evelyn Tsai Signed-off-by: Ryder Lee --- drivers/net/wireless/mediatek/mt76/mt7915/init.c | 7 ++++--- drivers/net/wireless/mediatek/mt76/mt7915/main.c | 4 ++++ 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c index 165be6abcc96..2ffadd22c259 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c @@ -181,8 +181,6 @@ static void mt7915_mac_init(struct mt7915_dev *dev) MT_WTBL_UPDATE_ADM_COUNT_CLEAR); for (i = 0; i < 2; i++) mt7915_mac_init_band(dev, i); - - mt7915_mcu_set_rts_thresh(&dev->phy, 0x92b); } static int mt7915_txbf_init(struct mt7915_dev *dev) @@ -295,7 +293,6 @@ static void mt7915_init_work(struct work_struct *work) mt7915_mac_init(dev); mt7915_init_txpower(dev); mt7915_txbf_init(dev); - mt7915_register_ext_phy(dev); } static int mt7915_init_hardware(struct mt7915_dev *dev) @@ -677,6 +674,10 @@ int mt7915_register_device(struct mt7915_dev *dev) ieee80211_queue_work(mt76_hw(dev), &dev->init_work); + ret = mt7915_register_ext_phy(dev); + if (ret) + return ret; + return mt7915_init_debugfs(dev); } diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c index 255f87aa1830..cde8c1ce3ae0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c @@ -65,6 +65,10 @@ static int mt7915_start(struct ieee80211_hw *hw) mt7915_mac_enable_nf(dev, 1); } + ret = mt7915_mcu_set_rts_thresh(phy, 0x92b); + if (ret) + goto out; + ret = mt7915_mcu_set_sku_en(phy, true); if (ret) goto out;