From patchwork Wed Sep 5 20:35:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 966665 X-Patchwork-Delegate: bhelgaas@google.com 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=fail (p=none dis=none) header.from=intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 425Fnd2Y1xz9s3Z for ; Thu, 6 Sep 2018 06:35:17 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727618AbeIFBHG (ORCPT ); Wed, 5 Sep 2018 21:07:06 -0400 Received: from mga18.intel.com ([134.134.136.126]:27539 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727364AbeIFBHG (ORCPT ); Wed, 5 Sep 2018 21:07:06 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Sep 2018 13:35:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,334,1531810800"; d="scan'208";a="260164733" Received: from unknown (HELO localhost.lm.intel.com) ([10.232.112.44]) by fmsmga005.fm.intel.com with ESMTP; 05 Sep 2018 13:34:53 -0700 From: Keith Busch To: Linux PCI , Bjorn Helgaas Cc: Benjamin Herrenschmidt , Sinan Kaya , Thomas Tai , poza@codeaurora.org, Lukas Wunner , Christoph Hellwig , Dennis Dalessandro , Sinan Kaya Subject: [PATCHv2 02/20] PCI: Fix faulty logic in pci_reset_bus() Date: Wed, 5 Sep 2018 14:35:28 -0600 Message-Id: <20180905203546.21921-3-keith.busch@intel.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180905203546.21921-1-keith.busch@intel.com> References: <20180905203546.21921-1-keith.busch@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Dennis Dalessandro The pci_rest_bus() function calls into pci_probe_reset_slot() to determine whether to call the slot or bus reset. The check has faulty logic in that it does not account for pci_probe_reset_slot() being able to return an errno. Fix by only calling the slot reset when the function returns 0. Treat < 1 and > 1 the same. Cc: Sinan Kaya Fixes: 811c5cb37df4 ("PCI: Unify try slot and bus reset API") Reviewed-by: Michael J. Ruhl Reviewed-by: Keith Busch Signed-off-by: Dennis Dalessandro --- drivers/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 29ff9619b5fa..30b260332a10 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5200,7 +5200,7 @@ static int __pci_reset_bus(struct pci_bus *bus) */ int pci_reset_bus(struct pci_dev *pdev) { - return pci_probe_reset_slot(pdev->slot) ? + return (!pci_probe_reset_slot(pdev->slot)) ? __pci_reset_slot(pdev->slot) : __pci_reset_bus(pdev->bus); } EXPORT_SYMBOL_GPL(pci_reset_bus);