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[2620:137:e000::3:3]) by mx.google.com with ESMTPS id k139-20020a628491000000b0068e3f3c6250si9656085pfd.343.2023.09.25.03.27.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Sep 2023 03:27:59 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id A0CD9807F4DC; Mon, 25 Sep 2023 02:35:16 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233234AbjIYJfP (ORCPT + 99 others); Mon, 25 Sep 2023 05:35:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233226AbjIYJfM (ORCPT ); Mon, 25 Sep 2023 05:35:12 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 11511DA for ; Mon, 25 Sep 2023 02:35:04 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A1CA2DA7; Mon, 25 Sep 2023 02:35:42 -0700 (PDT) Received: from [10.57.0.188] (unknown [10.57.0.188]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 45D8E3F5A1; Mon, 25 Sep 2023 02:35:03 -0700 (PDT) Message-ID: Date: Mon, 25 Sep 2023 10:34:59 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH] perf/arm-cmn: Fix the unhandled overflow status of counter 4 to 7 Content-Language: en-GB To: Jing Zhang , Ilkka Koskinen , Will Deacon , Mark Rutland Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Shuai Xue , Zhuo Song References: <1695612152-123633-1-git-send-email-renyu.zj@linux.alibaba.com> From: Robin Murphy In-Reply-To: <1695612152-123633-1-git-send-email-renyu.zj@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.2 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Mon, 25 Sep 2023 02:35:16 -0700 (PDT) On 2023-09-25 04:22, Jing Zhang wrote: > The register por_dt_pmovsr Bits[7:0] indicates overflow from counters 7 > to 0. But in arm_cmn_handle_irq(), only handled the overflow status of > Bits[3:0] which results in unhandled overflow status of counters 4 to 7. > > So let the overflow status of DTC counters 4 to 7 to be handled. Oh dear goodness, how has such a stupid typo managed to exist for 4 years? Truly this is a brown paper bag moment... :( Reviewed-by: Robin Murphy > Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver") > Signed-off-by: Jing Zhang > --- > drivers/perf/arm-cmn.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c > index 913dc04..6b50bc5 100644 > --- a/drivers/perf/arm-cmn.c > +++ b/drivers/perf/arm-cmn.c > @@ -1972,7 +1972,7 @@ static irqreturn_t arm_cmn_handle_irq(int irq, void *dev_id) > u64 delta; > int i; > > - for (i = 0; i < CMN_DTM_NUM_COUNTERS; i++) { > + for (i = 0; i < CMN_DT_NUM_COUNTERS; i++) { > if (status & (1U << i)) { > ret = IRQ_HANDLED; > if (WARN_ON(!dtc->counters[i]))