From nobody Wed Nov 27 02:32:02 2024 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 4F0E428FC; Mon, 14 Oct 2024 16:26:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728923208; cv=none; b=M7rHiuOEgl+Ou3Md1F6bCLML41FOmEl3SXE4l/s8wQROBglZgIy3vfqx+4nev1Zg0Be7pq3cbec738D7L1UHvOKYKpRdsS9Wl+h31VVNaAunnxzl4OT4d5yPjog5fIkoQ0KQatrasGfQBWYSV4xcI/8Ae1Y2pfj1oMhLr1JFl8c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728923208; c=relaxed/simple; bh=k9Br7NGn1JUJDdpw4cdkfc2viP9z4pXwuv/4rditTgM=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=t+KyLzsoX16fXoJHHAFGcd9XCbD+pB4+CZDutjGZo7VcBnSLsnXfdZOO7/NlndSdUr9lMCnII53T7LvArbQ2l1vSBkaj/lM0U7c//CUaUiH8wYKNu9JxvjhEK0pWMhEW/JgFA2xAJ68kZblJhqxdSIhhPPz2d0tfbprsNDjLGeY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=jW5/jYIv; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="jW5/jYIv" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49EAjHBR029461; Mon, 14 Oct 2024 16:26:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=qcppdkim1; bh=tcbhP5eT086myskRJMszrU ovLk1dvJ9QFpMPp6xbhxM=; b=jW5/jYIvnNMLYuKcwxMW2YdqWSV34aBeQz1nCJ WqrnEtRU9c8i17xDveNtcnRJ+rozNO8Fc6I5/tlyu18A0Ub0JNFxIngRKdk3Wnn1 k8p5cVqW8j5Bui/GNCoyLzBU388/Lu1TSYqVvQfHk89CxSnVP7F0TVEv4HoqbnLP IfgsfaBUn3IrdBhIeKCkxmcB/JWMeP4pgn4+nKpSjlFXyzmJTqvCp6J65HUpfs5T +okBxKL1bcMe6Mwl4+Jnwhm1/KiUBum8Wt7WJy0QSw7dWMDYjbEO8SzUqCr+qZdL fZGBG+JnoCU7cOlCNe55sCRaJi8bC9o7LXVHzPY9XOLrHCPw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 427jd8vx0t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Oct 2024 16:26:27 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 49EGQQr0000507 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Oct 2024 16:26:26 GMT Received: from hu-mrana-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 14 Oct 2024 09:26:26 -0700 From: Mayank Rana To: , , , , , CC: , , , Mayank Rana , "Marek Szyprowski" Subject: [PATCH v3] PCI: starfive: Enable PCIe controller's runtime PM before probing host bridge Date: Mon, 14 Oct 2024 09:26:07 -0700 Message-ID: <20241014162607.1247611-1-quic_mrana@quicinc.com> X-Mailer: git-send-email 2.25.1 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-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: FeoM34QLfoUxiLkmq9s0PbLfuQAorsip X-Proofpoint-ORIG-GUID: FeoM34QLfoUxiLkmq9s0PbLfuQAorsip X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 impostorscore=0 bulkscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 priorityscore=1501 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410140118 Content-Type: text/plain; charset="utf-8" PCIe controller device (i.e. PCIe starfive device) is parent to PCIe host bridge device. To enable runtime PM of PCIe host bridge device (child device), it is must to enable parent device's runtime PM to avoid seeing the below warning from PM core: pcie-starfive 940000000.pcie: Enabling runtime PM for inactive device with active children Fix this issue by enabling starfive pcie controller device's runtime PM before calling pci_host_probe() in plda_pcie_host_init(). Tested-by: Marek Szyprowski Signed-off-by: Mayank Rana Reviewed-by: Manivannan Sadhasivam --- v2->v3: - Update commit description based on Mani's feedback - Updated Reviewed-by tag Link to v2: https://patchwork.kernel.org/project/linux-pci/patch/2024101123= 5530.3919347-1-quic_mrana@quicinc.com/ v1->v2: Updated commit description based on Bjorn's feedback Link to v1: https://patchwork.kernel.org/project/linux-pci/patch/2024101020= 2950.3263899-1-quic_mrana@quicinc.com/ =20 drivers/pci/controller/plda/pcie-starfive.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/plda/pcie-starfive.c b/drivers/pci/cont= roller/plda/pcie-starfive.c index 0567ec373a3e..e73c1b7bc8ef 100644 --- a/drivers/pci/controller/plda/pcie-starfive.c +++ b/drivers/pci/controller/plda/pcie-starfive.c @@ -404,6 +404,9 @@ static int starfive_pcie_probe(struct platform_device *= pdev) if (ret) return ret; =20 + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + plda->host_ops =3D &sf_host_ops; plda->num_events =3D PLDA_MAX_EVENT_NUM; /* mask doorbell event */ @@ -413,11 +416,12 @@ static int starfive_pcie_probe(struct platform_device= *pdev) plda->events_bitmap <<=3D PLDA_NUM_DMA_EVENTS; ret =3D plda_pcie_host_init(&pcie->plda, &starfive_pcie_ops, &stf_pcie_event); - if (ret) + if (ret) { + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); return ret; + } =20 - pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); platform_set_drvdata(pdev, pcie); =20 return 0; --=20 2.25.1