From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1A1344C77; Mon, 23 Jun 2025 21:33:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750714402; cv=none; b=pIEvap0TxFSTa1WuK+4BGZMnU5gWCCTH8QowSjvynSz8sLvB/lctmsgCZDT/0tKRcckB4RqpH/1bbH1uh07+LEZA2yh8d0z0oNVWoh50qjnOmZ2jtdAjquiGcrjQSGNv0lgbmw2jvlbkJTKk/dDA5bBKcBKxTYS78vDteJISnDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750714402; c=relaxed/simple; bh=EiCuiFr9vfTZgy++4KU/nXJtPBMngoTpXTTkTYiBAlc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Enydu5fe3ldCHRZsE0yXVCCMXBh5O1oc6Mi6QVsb6wcYpYrlCN3cKxD5qv60n1I6lqunE/UXYTiqa0RXxYBox0MZwzrH5mMbkGvUlkEkxK5vXNTwRvSxukI51QAy/IhmwJF1gmnEsbsf5dicVbpb0nAhg8lFQQZhs5ePzzS+9LA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=P4iIt+T0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="P4iIt+T0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89D41C4CEEA; Mon, 23 Jun 2025 21:33:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750714401; bh=EiCuiFr9vfTZgy++4KU/nXJtPBMngoTpXTTkTYiBAlc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P4iIt+T0IGpMgmmXlQ69sp8DjzttElTAItRXSbuii3qCmbwxELJdKL9VCL/j6ehbo 4VJ+83IPuhXQFzFgK3UFrTNEgpO4d6yb0DJfU5q2CeUM4Dy57gYn9gW+IzITWX/rSB oZPj83IHTqt/AKUFIf2ipQNN1+rdLeB5qqfkxwoU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yanqing Wang , Macpaul Lin , Biao Huang , Paolo Abeni , Sasha Levin Subject: [PATCH 6.1 170/508] driver: net: ethernet: mtk_star_emac: fix suspend/resume issue Date: Mon, 23 Jun 2025 15:03:35 +0200 Message-ID: <20250623130649.457907574@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130645.255320792@linuxfoundation.org> References: <20250623130645.255320792@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yanqing Wang [ Upstream commit ba99c627aac85bc746fb4a6e2d79edb3ad100326 ] Identify the cause of the suspend/resume hang: netif_carrier_off() is called during link state changes and becomes stuck while executing linkwatch_work(). To resolve this issue, call netif_device_detach() during the Ethernet suspend process to temporarily detach the network device from the kernel and prevent the suspend/resume hang. Fixes: 8c7bd5a454ff ("net: ethernet: mtk-star-emac: new driver") Signed-off-by: Yanqing Wang Signed-off-by: Macpaul Lin Signed-off-by: Biao Huang Link: https://patch.msgid.link/20250528075351.593068-1-macpaul.lin@mediatek.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/mediatek/mtk_star_emac.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/mediatek/mtk_star_emac.c b/drivers/net/ethernet/mediatek/mtk_star_emac.c index c42e9f741f959..a631491a19da1 100644 --- a/drivers/net/ethernet/mediatek/mtk_star_emac.c +++ b/drivers/net/ethernet/mediatek/mtk_star_emac.c @@ -1475,6 +1475,8 @@ static __maybe_unused int mtk_star_suspend(struct device *dev) if (netif_running(ndev)) mtk_star_disable(ndev); + netif_device_detach(ndev); + clk_bulk_disable_unprepare(MTK_STAR_NCLKS, priv->clks); return 0; @@ -1499,6 +1501,8 @@ static __maybe_unused int mtk_star_resume(struct device *dev) clk_bulk_disable_unprepare(MTK_STAR_NCLKS, priv->clks); } + netif_device_attach(ndev); + return ret; } -- 2.39.5