From patchwork Fri Jul 1 14:01:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liang He X-Patchwork-Id: 1651244 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=126.com header.i=@126.com header.a=rsa-sha256 header.s=s110527 header.b=Yh/ncU0B; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4LZH2m4XLRz9s07 for ; Sat, 2 Jul 2022 00:02:40 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LZH2l5TSCz3dpg for ; Sat, 2 Jul 2022 00:02:39 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=126.com header.i=@126.com header.a=rsa-sha256 header.s=s110527 header.b=Yh/ncU0B; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=126.com (client-ip=123.126.96.3; helo=mail-m963.mail.126.com; envelope-from=windhl@126.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=126.com header.i=@126.com header.a=rsa-sha256 header.s=s110527 header.b=Yh/ncU0B; dkim-atps=neutral Received: from mail-m963.mail.126.com (mail-m963.mail.126.com [123.126.96.3]) by lists.ozlabs.org (Postfix) with ESMTP id 4LZH2S1jR5z3c7L for ; Sat, 2 Jul 2022 00:02:15 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=STErr QG6cRrz1z3quLcxS0dZKK+r4n/hcnfu9MMRTIg=; b=Yh/ncU0Bo7vCgTWOk0mpZ ln/5apMyrU1LxiQXdT7p8kmSB/YCYSr7I67IMvLcB6v7Ic9mVW3B47Idder2DwGI LlNGaXGB+J/4aI/FcDDpPDLHNyS6XFDaed/vAaaeBtqG2mn7VC/GOq+EeKYv09Br iYdI1Krn5N4YCloakCZcgs= Received: from localhost.localdomain (unknown [124.16.139.61]) by smtp8 (Coremail) with SMTP id NORpCgD3VZow_r5iIrXsGw--.47428S2; Fri, 01 Jul 2022 22:01:21 +0800 (CST) From: Liang He To: oss@buserror.net, mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org, linuxppc-dev@lists.ozlabs.org, windhl@126.com Subject: [PATCH] powerpc: 85xx: Fix refcount bugs in ge_imp3a_pci_assign_primary() Date: Fri, 1 Jul 2022 22:01:19 +0800 Message-Id: <20220701140119.245435-1-windhl@126.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: NORpCgD3VZow_r5iIrXsGw--.47428S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7JryDtF43AF45JFyrAr1UKFg_yoWDZwb_A3 4xZFWDZr4kJr1q9F1q9r4rArWDCrZ3Wr9FgF1Iq3W3u3WYqa4rtrnrJrZ7Aw15urW2yFW3 AFnFy343CaySkjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRNYFCUUUUUU== X-Originating-IP: [124.16.139.61] X-CM-SenderInfo: hzlqvxbo6rjloofrz/1tbizhExF18RPadbtQAAsD 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: , Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" for_each_node_by_type() will automatically increase and decrease the refcount during the iteration. However, there is a reference escaped into global 'fsl_pci_primary' and we need to handle it. Signed-off-by: Liang He --- arch/powerpc/platforms/85xx/ge_imp3a.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/85xx/ge_imp3a.c b/arch/powerpc/platforms/85xx/ge_imp3a.c index 8e827376d97b..e3e8f18825a1 100644 --- a/arch/powerpc/platforms/85xx/ge_imp3a.c +++ b/arch/powerpc/platforms/85xx/ge_imp3a.c @@ -89,8 +89,10 @@ static void __init ge_imp3a_pci_assign_primary(void) of_device_is_compatible(np, "fsl,mpc8548-pcie") || of_device_is_compatible(np, "fsl,p2020-pcie")) { of_address_to_resource(np, 0, &rsrc); - if ((rsrc.start & 0xfffff) == 0x9000) - fsl_pci_primary = np; + if ((rsrc.start & 0xfffff) == 0x9000) { + of_node_put(fsl_pci_primary); + fsl_pci_primary = of_node_get(np); + } } } #endif