From patchwork Fri Aug 9 17:48:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 1144873 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="ODw1VWOk"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 464t5J6tVzz9sP3 for ; Sat, 10 Aug 2019 03:48:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407576AbfHIRsf (ORCPT ); Fri, 9 Aug 2019 13:48:35 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:53506 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726216AbfHIRsf (ORCPT ); Fri, 9 Aug 2019 13:48:35 -0400 Received: by mail-wm1-f68.google.com with SMTP id 10so6509326wmp.3; Fri, 09 Aug 2019 10:48:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=i+ph51ddfAMHxsV4U4mVgIYNDFpq4leR2YkXuGPovKA=; b=ODw1VWOk2pY/Y6L8dxZAHgwAh++yC8hcFSobe4N3wZdVrLP43CjF+AhJMhA+9Q92qe vPi1ZAlhzw7vC9FvVCYC5fIKU1fLcKa3vNT2Dfns1fa20TIiY3bym/EPNm1KSJvckSp2 fIGLWIlcaiGZaxx/50Hpi/nF9lxhF19XIOIdbvee04UzJQiTx88011q1i+HWzJIpjk+O Zq+b11vyy/fOE7vLYz34tgVMquPKQeQrez+Gdhk/6lYCT2Eam2zN2vvQAEaeo5CmHDOI Cxgek5c+RoZpR8B0RpYiXHYFRKZQXwrk3cHaHr9Lk5arFXrshF1+0nGTQnzaYCj8oYB0 mOhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=i+ph51ddfAMHxsV4U4mVgIYNDFpq4leR2YkXuGPovKA=; b=KGebr0AZ4dsfI8JvRhxE82tM+XnyH4/6acgwU1Wkkad3iTMu6FRNxmFbLZwXRw6X2b Ii2ghhlkLLbSShRNqb/lFcWzKUEFDm+nR31fjne9UM68qdkO9xNktd3YRzXmSHMwcqz1 dPl253ehWK3UliDSUsT9EesSX5CNeAoYT0hgxq753dVR+lBIRVOZWvEPbERpf4iJbrj8 0Mt1lz5uIavBfclEudypjjET+T3siIPOJCCI5xiXt8El95UrdNPptpqOuWPdM11VGrbO 3lQDVLMR55og/l7VE+PCzdw/poWDFvqUpnoCNj8w8MK7IE3PccoOhSDAaZI05Rmo4HFD SLBg== X-Gm-Message-State: APjAAAWoNqgkXIuB2oDZxi3kA2nVHiQpPnQyCgLIXDuGXTx63ILHS7E8 9d7pz9Hgi/dubE0YxxO5UFm07op5 X-Google-Smtp-Source: APXvYqxdwunAut7qarespasbnRFivAqSmVHNLCg51VEwmRSEUPncgby36lJVpN1cAWRpRDvZk7FKXQ== X-Received: by 2002:a1c:80d0:: with SMTP id b199mr11917626wmd.31.1565372912850; Fri, 09 Aug 2019 10:48:32 -0700 (PDT) Received: from chi.lan (ip-86-49-35-8.net.upcbroadband.cz. [86.49.35.8]) by smtp.gmail.com with ESMTPSA id z18sm3999182wml.10.2019.08.09.10.48.31 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 09 Aug 2019 10:48:31 -0700 (PDT) From: marek.vasut@gmail.com To: linux-pci@vger.kernel.org Cc: Marek Vasut , Geert Uytterhoeven , Lorenzo Pieralisi , Wolfram Sang , linux-renesas-soc@vger.kernel.org Subject: [PATCH V2 1/3] PCI: rcar: Move the inbound index check Date: Fri, 9 Aug 2019 19:48:23 +0200 Message-Id: <20190809174825.2572-1-marek.vasut@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Marek Vasut Since the $idx variable value is stored across multiple calls to rcar_pcie_inbound_ranges() function, and the $idx value is used to index registers which are written, subsequent calls might cause the $idx value to be high enough to trigger writes into nonexistent registers. Fix this by moving the $idx value check to the beginning of the loop. Signed-off-by: Marek Vasut Cc: Geert Uytterhoeven Cc: Lorenzo Pieralisi Cc: Wolfram Sang Cc: linux-renesas-soc@vger.kernel.org To: linux-pci@vger.kernel.org --- V2: New patch --- drivers/pci/controller/pcie-rcar.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c index f6a669a9af41..0f501acbc3bb 100644 --- a/drivers/pci/controller/pcie-rcar.c +++ b/drivers/pci/controller/pcie-rcar.c @@ -1048,6 +1048,10 @@ static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, mask &= ~0xf; while (cpu_addr < cpu_end) { + if (idx > MAX_NR_INBOUND_MAPS) { + dev_err(pcie->dev, "Failed to map inbound regions!\n"); + return -EINVAL; + } /* * Set up 64-bit inbound regions as the range parser doesn't * distinguish between 32 and 64-bit types. @@ -1067,11 +1071,6 @@ static int rcar_pcie_inbound_ranges(struct rcar_pcie *pcie, pci_addr += size; cpu_addr += size; idx += 2; - - if (idx > MAX_NR_INBOUND_MAPS) { - dev_err(pcie->dev, "Failed to map inbound regions!\n"); - return -EINVAL; - } } *index = idx;