From patchwork Tue Jul 9 09:01:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Varadarajan Narayanan X-Patchwork-Id: 13727484 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 938B214A0A7; Tue, 9 Jul 2024 09:02:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720515735; cv=none; b=XArH8+3uDRPSrVVi/fx47ohnJdtsflbS2la7FAafwrpbe+vwFgSqeQh2FjfkSTiYEiF5qhfryuuUYZTZXWFgFU6OCw0a4UVIDF2xqGr2pV2lwQPTCJvHwrnBMK2XZPKaSYtCzcm4PaB0j9yF9VQnj0wpI7dqFuDnSURCaKvplyc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720515735; c=relaxed/simple; bh=b3i/0MCfgU6QEYwO+bz83cgYeRopRLQVdxliOV9f+Mc=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oF9wR6G7GMsTK0cyN1K/HLinpeiya6EvhP7XDo2EEtKrAa8TpAZ52De7Q3P4AiLsYrmG6mfKnExldkc9+TRgupC8Z+zmAr+j8bj8msQ5Abz+G/zqKdwuNBXDWLrqa/Z5qEKt1ikQ5JRVhByXBApgMCFxEq7a2rp5MIritfgrF/A= 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=fp0tQxqx; arc=none smtp.client-ip=205.220.180.131 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="fp0tQxqx" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4691kXAw028546; Tue, 9 Jul 2024 09:02:01 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= FzK5OFs+lr/zFK/GI0khIU41rLOIjusdVR//B7Nztbs=; b=fp0tQxqxlFYK+fIQ aHrk49mP6cIm8qMNjEYe+j04KzniQyG7fGxkITOs5GyvROVfslOeNcMvBiJ+rKAm NZqTj0kwwYbiqql4nVjdQtnWp3s37I+8aW1uajDkIZVY9FiCQMbwsmM6swO2PtrV T+lIOBdkxoDSDDkTs2ssDhUXm7VB/38gOWbpMNc1rl2ioCn02U3ulrD0TY3RL+xX N0urStyAA98HwyMWKqkspWbXnjc7NaHyDesOf9OjSxMrJdzMcS7K9oPd40Hs9wN+ awmyS7q8AuaNl8TjbFASUt+8i7HxYeZQxABpi1NOlP3Wt4cN0Jj/r4GCu/Kk4KfK k2sCXw== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 406wjn63ns-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 Jul 2024 09:02:01 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 469920XL028282 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 9 Jul 2024 09:02:00 GMT Received: from hu-varada-blr.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 9 Jul 2024 02:01:52 -0700 From: Varadarajan Narayanan To: , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 1/9] soc: qcom: cpr3: Fix 'acc_desc' usage Date: Tue, 9 Jul 2024 14:31:24 +0530 Message-ID: <20240709090132.117077-2-quic_varada@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240709090132.117077-1-quic_varada@quicinc.com> References: <20240709090132.117077-1-quic_varada@quicinc.com> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: bCZa46p-U440S9LoGlUdWHdjqZURj8v6 X-Proofpoint-GUID: bCZa46p-U440S9LoGlUdWHdjqZURj8v6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-08_15,2024-07-08_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=901 clxscore=1015 mlxscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 phishscore=0 malwarescore=0 bulkscore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2407090060 cpr3 code assumes that 'acc_desc' is available for SoCs implementing CPR version 4 or less. However, IPQ9574 SoC implements CPRv4 without ACC. This causes NULL pointer accesses resulting in crashes. Hence, check if 'acc_desc' is populated before using it. Signed-off-by: Varadarajan Narayanan --- v5: Add acc_desc check in a different way without breaking other SoC v4: Undo the acc_desc validation in probe function as that could affect other SoC. --- drivers/pmdomain/qcom/cpr3.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pmdomain/qcom/cpr3.c b/drivers/pmdomain/qcom/cpr3.c index c7790a71e74f..08a306d86403 100644 --- a/drivers/pmdomain/qcom/cpr3.c +++ b/drivers/pmdomain/qcom/cpr3.c @@ -2399,12 +2399,12 @@ static int cpr_pd_attach_dev(struct generic_pm_domain *domain, if (ret) goto exit; - if (acc_desc->config) + if (acc_desc && acc_desc->config) regmap_multi_reg_write(drv->tcsr, acc_desc->config, acc_desc->num_regs_per_fuse); /* Enable ACC if required */ - if (acc_desc->enable_mask) + if (acc_desc && acc_desc->enable_mask) regmap_update_bits(drv->tcsr, acc_desc->enable_reg, acc_desc->enable_mask, acc_desc->enable_mask); @@ -2703,7 +2703,7 @@ static int cpr_probe(struct platform_device *pdev) mutex_init(&drv->lock); - if (desc->cpr_type < CTRL_TYPE_CPRH) { + if (data->acc_desc && desc->cpr_type < CTRL_TYPE_CPRH) { np = of_parse_phandle(dev->of_node, "qcom,acc", 0); if (!np) return -ENODEV;