From patchwork Wed Oct 2 06:02:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Bobroff X-Patchwork-Id: 1170478 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) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46jm5v2qvSz9sPL for ; Wed, 2 Oct 2019 16:13:07 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46jm5t6ZnHzDqQh for ; Wed, 2 Oct 2019 16:13:06 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=sbobroff@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.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 46jltK0NsCzDqPg for ; Wed, 2 Oct 2019 16:03:04 +1000 (AEST) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9262KUD065111 for ; Wed, 2 Oct 2019 02:03:02 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vchwkech8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 02 Oct 2019 02:03:01 -0400 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) Wed, 2 Oct 2019 07:02:58 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9262v7I49152138 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 2 Oct 2019 06:02:57 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2437911C05E; Wed, 2 Oct 2019 06:02:57 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C767B11C050; Wed, 2 Oct 2019 06:02:56 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 2 Oct 2019 06:02:56 +0000 (GMT) Received: from osmium.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 82FF7A03B1; Wed, 2 Oct 2019 16:02:53 +1000 (AEST) From: Sam Bobroff To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH RFC 08/15] powerpc/eeh: Sync eeh_handle_normal_event() Date: Wed, 2 Oct 2019 16:02:46 +1000 X-Mailer: git-send-email 2.22.0.216.g00a2a96fc9 In-Reply-To: References: MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19100206-0012-0000-0000-000003533B68 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19100206-0013-0000-0000-0000218E3D1F Message-Id: <928a11a50e2c6a1df56dc1a9c5ed14dd51ba15f1.1569996166.git.sbobroff@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-02_04:, , 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=8.0.1-1908290000 definitions=main-1910020057 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: oohall@gmail.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Synchronize access to eeh_pe. Signed-off-by: Sam Bobroff --- arch/powerpc/kernel/eeh_driver.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index b3245d0cfb22..c9d73070793e 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -879,6 +879,7 @@ static void eeh_clear_slot_attention(struct pci_dev *pdev) * & devices under this slot, and then finally restarting the device * drivers (which cause a second set of hotplug events to go out to * userspace). + * Consumes the reference on 'pe'. */ void eeh_handle_normal_event(struct eeh_pe *pe) { @@ -898,6 +899,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe) if (!bus) { pr_err("%s: Cannot find PCI bus for PHB#%x-PE#%x\n", __func__, pe->phb->global_number, pe->addr); + eeh_put_pe(pe); /* Release ref */ return; } @@ -1141,6 +1143,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe) pci_hp_remove_devices(bus); pci_unlock_rescan_remove(); /* The passed PE should no longer be used */ + eeh_put_pe(pe); /* Release ref */ return; } } @@ -1160,6 +1163,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe) eeh_pe_state_clear(pe, EEH_PE_RECOVERING, true); pr_info("PE state after recovery:\n"); eeh_tree_state_dump_kprintf(pe); + eeh_put_pe(pe); /* Release ref */ } /**