From patchwork Thu Jun 13 16:45:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 13697134 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 E512912D775; Thu, 13 Jun 2024 16:45:32 +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=1718297138; cv=none; b=GM9/BSX0V6awjPhpCFhxP8EQWuF6GQyJXUyYoTCjUjRGLOwja7Znoq2Uhme3Ja+JNqCiaQ1KgeKhF3DK6v8oQn9B4Tl0bcV13jYqOL7NERIh8TWjqJWHr1P4Z4ui+Ab+7/FxwcoOutMuG3G5BY6AN2gLDuX4ItMeXNGRlSv1Kvs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718297138; c=relaxed/simple; bh=tiljCiNLvQGlJmjyR9Odqrxtift+JD+Stzcu183Qx4I=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=QISi4Y29dU15O5LrjBhV+xX9s8KKEs5Es5HLCNs2p86Fihe402edbmgvrzn9Cfnxc2BWaTovXgU0IvrM2b4knMElxYqQXTVoCzZ2wUnqUOchXn60fEaJL9/xn+zAo/zR1i+LkE2E33ZdpSui3InYkgVTRg7HmtG0NmEemHNagMs= 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=SdG3oHth; 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="SdG3oHth" Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45DEXQc6001018; Thu, 13 Jun 2024 16:45:28 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=PRE9Shmd/Dulfe9+6Jgtbb tk2F/LuqPjSOhBVuWT80I=; b=SdG3oHthUbhE6UaFags5CYfb0Ok1n59r8WuBd+ eJzInV70JwhK+0EV2oADFp6grZZWhyr5JYsn+o+lfaXJ2i5qndrwET1cmATuwwzD Py3Q/lmGVQi9LkwVAcLIR75WUNZBu9hML+GV3FW5p5jMpX7ogKieZUuYxtiMvDdq JKeC4AweSDVoMfB8Dbpkc0I+VmoWYX1ucpBp5rG6sb1u965f3tTsKnMCe5sg23HJ JNDQv4ClQ4hyJBIshmC11yBwYkGFZP4FGFdAupyoqd/4hsSjudFfGQ5RDamC1Bp4 6GIUav/7qhg9Ai1NZBlVWDEergM4lRU+YzkExBoj8BnFlJJg== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3yqukc9nec-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 13 Jun 2024 16:45:28 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 45DGjRGR006196 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 13 Jun 2024 16:45:27 GMT Received: from hu-sibis-blr.qualcomm.com (10.80.80.8) 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; Thu, 13 Jun 2024 09:45:23 -0700 From: Sibi Sankar To: , , , CC: , , , , , Subject: [PATCH] soc: qcom: icc-bwmon: Fix refcount imbalance seen during bwmon_remove Date: Thu, 13 Jun 2024 22:15:06 +0530 Message-ID: <20240613164506.982068-1-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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: Tk_GMHvcatbzUhbysq0mQ6TfHl9eutXt X-Proofpoint-ORIG-GUID: Tk_GMHvcatbzUhbysq0mQ6TfHl9eutXt 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=2024-06-13_11,2024-06-13_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 spamscore=0 mlxscore=0 suspectscore=0 mlxlogscore=999 clxscore=1011 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406130118 The following warning is seen during bwmon_remove due to refcount imbalance, fix this by releasing the OPPs after use. Logs: WARNING: at drivers/opp/core.c:1640 _opp_table_kref_release+0x150/0x158 Hardware name: Qualcomm Technologies, Inc. X1E80100 CRD (DT) ... Call trace: _opp_table_kref_release+0x150/0x158 dev_pm_opp_remove_table+0x100/0x1b4 devm_pm_opp_of_table_release+0x10/0x1c devm_action_release+0x14/0x20 devres_release_all+0xa4/0x104 device_unbind_cleanup+0x18/0x60 device_release_driver_internal+0x1ec/0x228 driver_detach+0x50/0x98 bus_remove_driver+0x6c/0xbc driver_unregister+0x30/0x60 platform_driver_unregister+0x14/0x20 bwmon_driver_exit+0x18/0x524 [icc_bwmon] __arm64_sys_delete_module+0x184/0x264 invoke_syscall+0x48/0x118 el0_svc_common.constprop.0+0xc8/0xe8 do_el0_svc+0x20/0x2c el0_svc+0x34/0xdc el0t_64_sync_handler+0x13c/0x158 el0t_64_sync+0x190/0x194 --[ end trace 0000000000000000 ]--- Fixes: 0276f69f13e2 ("soc: qcom: icc-bwmon: Set default thresholds dynamically") Fixes: b9c2ae6cac40 ("soc: qcom: icc-bwmon: Add bandwidth monitoring driver") Signed-off-by: Sibi Sankar Reviewed-by: Konrad Dybcio --- drivers/soc/qcom/icc-bwmon.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/icc-bwmon.c b/drivers/soc/qcom/icc-bwmon.c index fb323b3364db..ecddb60bd665 100644 --- a/drivers/soc/qcom/icc-bwmon.c +++ b/drivers/soc/qcom/icc-bwmon.c @@ -565,7 +565,7 @@ static void bwmon_start(struct icc_bwmon *bwmon) int window; /* No need to check for errors, as this must have succeeded before. */ - dev_pm_opp_find_bw_ceil(bwmon->dev, &bw_low, 0); + dev_pm_opp_put(dev_pm_opp_find_bw_ceil(bwmon->dev, &bw_low, 0)); bwmon_clear_counters(bwmon, true); @@ -772,11 +772,13 @@ static int bwmon_probe(struct platform_device *pdev) opp = dev_pm_opp_find_bw_floor(dev, &bwmon->max_bw_kbps, 0); if (IS_ERR(opp)) return dev_err_probe(dev, PTR_ERR(opp), "failed to find max peak bandwidth\n"); + dev_pm_opp_put(opp); bwmon->min_bw_kbps = 0; opp = dev_pm_opp_find_bw_ceil(dev, &bwmon->min_bw_kbps, 0); if (IS_ERR(opp)) return dev_err_probe(dev, PTR_ERR(opp), "failed to find min peak bandwidth\n"); + dev_pm_opp_put(opp); bwmon->dev = dev;