From patchwork Tue Nov 27 08:24:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anju T Sudhakar X-Patchwork-Id: 1003669 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 433xkl0d5Wz9s3C for ; Tue, 27 Nov 2018 19:28:31 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 433xkk5zfMzDqWn for ; Tue, 27 Nov 2018 19:28:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=anju@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 433xfr5Dn9zDqcl for ; Tue, 27 Nov 2018 19:25:08 +1100 (AEDT) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wAR8Ox3K031736 for ; Tue, 27 Nov 2018 03:25:06 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2p10js4r0x-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 27 Nov 2018 03:25:05 -0500 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 27 Nov 2018 08:24:57 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wAR8Oukk59244566 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 27 Nov 2018 08:24:56 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9CDAB5204E; Tue, 27 Nov 2018 08:24:56 +0000 (GMT) Received: from localhost.in.ibm.com (unknown [9.124.35.168]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 89CD552050; Tue, 27 Nov 2018 08:24:55 +0000 (GMT) From: Anju T Sudhakar To: mpe@ellerman.id.au Subject: [PATCH] powerpc/perf: Return accordingly on invalid chip-id in Date: Tue, 27 Nov 2018 13:54:52 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181127082452.8307-1-anju@linux.vnet.ibm.com> References: <20181127082452.8307-1-anju@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18112708-0012-0000-0000-000002D0C4B0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18112708-0013-0000-0000-00002106049A Message-Id: <20181127082452.8307-2-anju@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-11-27_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811270076 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maddy@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, anju@linux.vnet.ibm.com, dan.carpenter@oracle.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Nest hardware counter memory resides in a per-chip reserve-memory. During nest_imc_event_init(), chip-id of the event-cpu is considered to calculate the base memory addresss for that cpu. Return, proper error condition if the chip_id calculated is invalid. Reported-by: Dan Carpenter Fixes: 885dcd709ba91 ("powerpc/perf: Add nest IMC PMU support") Reviewed-by: Madhavan Srinivasan Signed-off-by: Anju T Sudhakar --- arch/powerpc/perf/imc-pmu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c index 6954636b16d1..78514170cf71 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -496,6 +496,11 @@ static int nest_imc_event_init(struct perf_event *event) * Get the base memory addresss for this cpu. */ chip_id = cpu_to_chip_id(event->cpu); + + /* Return, if chip_id is not valid */ + if (chip_id < 0) + return -ENODEV; + pcni = pmu->mem_info; do { if (pcni->id == chip_id) {