From patchwork Tue Aug 22 05:26:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Zhang X-Patchwork-Id: 715830 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CEC35EE49B0 for ; Tue, 22 Aug 2023 05:27:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232574AbjHVF1a (ORCPT ); Tue, 22 Aug 2023 01:27:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232620AbjHVF12 (ORCPT ); Tue, 22 Aug 2023 01:27:28 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BD7B1A4; Mon, 21 Aug 2023 22:27:24 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37M4SAO5003861; Tue, 22 Aug 2023 05:26:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=2+FYJqvd8KPGLBxHJyZuzJMgY6Vqc6U1VDQqXT1I4S0=; b=f/W7mCBR4m4jCiAvd2hZTLsVZ05VJ+DpFeX2C0I0CWxNdW7HzCTQe9+89TwNVABF+BTd iWpkixzeD4xgBRThbbiALt8bsqJZkdJYWWeMCaM8hGVOGYRrRjNEAxDUT8mhMh3SJ0UB 4q4Q5lysKjLCiRptwL3J4KNhiwCNOakwutLLjvq9htzZCUMvZeXjdQQCbnTZG6cjLsba vEq9R6zUeyGSMi+ytIRq1suCPW5y9yWE/0jIr9naNOVznl85Yks6A9nrkXn0iSK4LRKC Ud2WFNCqENMBdxzTWu0UZA1UAITufxU8SCYIVvGA4amvR26smifgKxXVOjTYvDjr43m1 fA== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3sm7jdhyva-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Aug 2023 05:26:44 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 37M5QhBE006806 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Aug 2023 05:26:43 GMT Received: from taozha-gv.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Mon, 21 Aug 2023 22:26:38 -0700 From: Tao Zhang To: Mathieu Poirier , Suzuki K Poulose , Alexander Shishkin , Konrad Dybcio , Mike Leach , Rob Herring , Krzysztof Kozlowski CC: Tao Zhang , Jinlong Mao , Leo Yan , Greg Kroah-Hartman , , , , , Tingwei Zhang , Yuanfang Zhang , Trilok Soni , Hao Zhang , , Subject: [PATCH v8 01/13] coresight-tpdm: Remove the unnecessary lock Date: Tue, 22 Aug 2023 13:26:01 +0800 Message-ID: <1692681973-20764-2-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1692681973-20764-1-git-send-email-quic_taozha@quicinc.com> References: <1692681973-20764-1-git-send-email-quic_taozha@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: jbXo9CLZIrer4NZqTvRcJLD704O_p1sH X-Proofpoint-ORIG-GUID: jbXo9CLZIrer4NZqTvRcJLD704O_p1sH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-22_03,2023-08-18_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 phishscore=0 clxscore=1011 mlxscore=0 lowpriorityscore=0 mlxlogscore=999 suspectscore=0 priorityscore=1501 impostorscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308220043 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Remove the unnecessary lock "CS_{UN,}LOCK" in TPDM driver. This lock is only needed while writing the data to Coresight registers. Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-tpdm.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index f4854af..b645612 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -114,11 +114,9 @@ static void tpdm_init_default_data(struct tpdm_drvdata *drvdata) { u32 pidr; - CS_UNLOCK(drvdata->base); /* Get the datasets present on the TPDM. */ pidr = readl_relaxed(drvdata->base + CORESIGHT_PERIPHIDR0); drvdata->datasets |= pidr & GENMASK(TPDM_DATASETS - 1, 0); - CS_LOCK(drvdata->base); } /*