From nobody Fri Sep 25 14:31:50 2026 Received: from mail-m155101.qiye.163.com (mail-m155101.qiye.163.com [101.71.155.101]) (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 475D83F412B; Fri, 11 Sep 2026 06:09:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=101.71.155.101 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789106975; cv=none; b=pRZWY8b/BNpVVYH9YGhPAUB0h07hwCVNqbRbOoqnPU1DfpnRjbjl7IG17EK8u+WA5NqgnwaAw+vmbO3XhrxrcKLgPlLOPRiHzcUg365q5izel6Ve5XoepLriOVnDFsGed4EyF1xiVDoqJAZiE7kTYpkT3eIws01qTme/cc75gFs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789106975; c=relaxed/simple; bh=ADkggTW8RH6T2yTzoHu9/jk42cW3Kw5gtDzEFKW4+3I=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=oobNewa0sNIse84iDJk2JazkXsYvZw3WR5SLNjC3863SfaJ/FNaT+/ET39yNCGMBRd8zJF2duAklG6W/vS96bq3SQEpDSZCkxym3nRU+CFHAClOE3Gn5kvIg62GvlfXKi6Z9IjoKrnrswlYc+1KTULRCG3wkAHybSwHQQNbiTFc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn; spf=pass smtp.mailfrom=seu.edu.cn; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b=j930sFoJ; arc=none smtp.client-ip=101.71.155.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b="j930sFoJ" Received: from seu.edu.cn (unknown [222.191.246.242]) by smtp.qiye.163.com (Hmail) with ESMTP id 4d62c4fc2; Fri, 11 Sep 2026 14:09:30 +0800 (GMT+08:00) From: Slavin Liu To: ulfh@kernel.org, frank.li@nxp.com, s.hauer@pengutronix.de Cc: kernel@pengutronix.de, festevam@gmail.com, linux-pm@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bolin.liu@seu.edu.cn Subject: [PATCH RFC] pmdomain: imx: reject a missing bus power domain Date: Fri, 11 Sep 2026 14:09:29 +0800 Message-Id: <20260911060929.94481-1-bolin.liu@seu.edu.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-HM-Tid: 0aa08f15dceb03a1kunm8126a0a81c7377 X-HM-MType: 10 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkZS01NVhlDSUpPGRpISk4eTFYeHw 5VEwETFhoSFyQUDg9ZV1kYEgtZQVlJSUlVSkJKVUlPTVVJT0lZV1kWGg8SFR0UWUFZT0tIVUpLSU hOQ0NVSktLVUtZBg++ DKIM-Signature: a=rsa-sha256; b=j930sFoJBSDlrQKg5hhUbpgFngB5t6l/UFcdtdQtZ4DttF9DdBRdN8GcPFX+xlwHvGz1gEmpkkJAIVosHU3dDF6yE+mY7Zj+eUoVmCjseS7mtUufsXJki71slHoqavXBfrGQOQSQKymp91UflSBQJBmoe61S81PhhHamLtKGd18=; c=relaxed/relaxed; s=default; d=seu.edu.cn; v=1; bh=Q/gVuEgQ+O1MlxzayRMNUxUrBsV8eHwDdB0w2KFHMt4=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" The named-domain attach API may return NULL for an absent name. Treat that as -ENODEV before publishing bus_power_dev to later unwind paths, without changing the handling of existing error pointers. Detected by static analysis and reviewed with AI-assisted source auditing. Fixes: 2684ac05a8c4 ("soc: imx: add i.MX8M blk-ctrl driver") Fixes: 556f5cf9568a ("soc: imx: add i.MX8MP HSIO blk-ctrl") Assisted-by: LLM Signed-off-by: Slavin Liu --- drivers/pmdomain/imx/imx8m-blk-ctrl.c | 2 ++ drivers/pmdomain/imx/imx8mp-blk-ctrl.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/pmdomain/imx/imx8m-blk-ctrl.c b/drivers/pmdomain/imx/i= mx8m-blk-ctrl.c index 479789009c7f..9653a8ac9a6e 100644 --- a/drivers/pmdomain/imx/imx8m-blk-ctrl.c +++ b/drivers/pmdomain/imx/imx8m-blk-ctrl.c @@ -228,6 +228,8 @@ static int imx8m_blk_ctrl_probe(struct platform_device = *pdev) return -ENOMEM; =20 bc->bus_power_dev =3D dev_pm_domain_attach_by_name(dev, "bus"); + if (!bc->bus_power_dev) + return dev_err_probe(dev, -ENODEV, "missing bus power domain\n"); if (IS_ERR(bc->bus_power_dev)) { if (PTR_ERR(bc->bus_power_dev) =3D=3D -ENODEV) return dev_err_probe(dev, -EPROBE_DEFER, diff --git a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c b/drivers/pmdomain/imx/= imx8mp-blk-ctrl.c index d255c20f58e2..e952b4ee75c0 100644 --- a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c +++ b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c @@ -655,6 +655,8 @@ static int imx8mp_blk_ctrl_probe(struct platform_device= *pdev) return -ENOMEM; =20 bc->bus_power_dev =3D dev_pm_domain_attach_by_name(dev, "bus"); + if (!bc->bus_power_dev) + return dev_err_probe(dev, -ENODEV, "missing bus power domain\n"); if (IS_ERR(bc->bus_power_dev)) return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev), "failed to attach bus power domain\n");