From patchwork Mon Sep 11 12:53:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13380056 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1899CA0EC6 for ; Mon, 11 Sep 2023 21:41:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350573AbjIKVjT (ORCPT ); Mon, 11 Sep 2023 17:39:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237508AbjIKMyo (ORCPT ); Mon, 11 Sep 2023 08:54:44 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97597E40; Mon, 11 Sep 2023 05:54:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1694436880; x=1725972880; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QCUHLcOIhxBRk27P/kLo+OYYTB7a6Wv3t3NHhSYLmJ0=; b=gyuhulO1f4sSNWvKqFVmH51yb9CiwI0WX0vTlhOdWgZEkzRDh8i7oSUI 1HiI4MH5LzbH08Jlv96YouT0MWOVBEuA03qRfGoDE4Wfe03shkkf4vmmj bjE1jNGb/c9u/ZxxxJvYxrzyjdbpr35vg2+vp97tehXw9JCNkd7LoAI2T EZWKq1K2w365gAXnXvI0D5y8/hCRbY+7ub+CXWVpDJ02LEWoNz6VNxo1K eZbrHc77ibTY91otw+Lcjg8Li0Xt7msRsQbLZCcsySLO0oz9d9KynZqSS qWnov/S6qEfw5f5WQgfbOd9bJugrKROiUQrdrT32/2sJn7t0A1zLW7Sqv Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10830"; a="357511257" X-IronPort-AV: E=Sophos;i="6.02,244,1688454000"; d="scan'208";a="357511257" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 05:54:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10830"; a="858304426" X-IronPort-AV: E=Sophos;i="6.02,244,1688454000"; d="scan'208";a="858304426" Received: from mzarkov-mobl3.ger.corp.intel.com (HELO ijarvine-mobl2.ger.corp.intel.com) ([10.252.36.200]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 05:54:34 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Rob Herring , Bjorn Helgaas , linux-pci@vger.kernel.org, Bjorn Helgaas , linux-kernel@vger.kernel.org Cc: 3chas3@gmail.com, brking@us.ibm.com, dalias@libc.org, glaubitz@physik.fu-berlin.de, ink@jurassic.park.msu.ru, jejb@linux.ibm.com, kw@linux.com, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-atm-general@lists.sourceforge.net, linux-scsi@vger.kernel.org, linux-sh@vger.kernel.org, lpieralisi@kernel.org, martin.petersen@oracle.com, mattst88@gmail.com, netdev@vger.kernel.org, richard.henderson@linaro.org, toan@os.amperecomputing.com, ysato@users.sourceforge.jp, =?utf-8?q?Ilpo_J?= =?utf-8?q?=C3=A4rvinen?= Subject: [PATCH v3 4/6] PCI: Do error check on own line to split long if conditions Date: Mon, 11 Sep 2023 15:53:52 +0300 Message-Id: <20230911125354.25501-5-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230911125354.25501-1-ilpo.jarvinen@linux.intel.com> References: <20230911125354.25501-1-ilpo.jarvinen@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Placing PCI error code check inside if condition usually results in need to split lines. Combined with additional conditions the if condition becomes messy. Convert to the usual error handling pattern with an additional variable to improve code readability. In addition, reverse the logic in pci_find_vsec_capability() to get rid of &&. No functional changes intended. Signed-off-by: Ilpo Järvinen --- drivers/pci/pci.c | 9 ++++++--- drivers/pci/probe.c | 6 +++--- drivers/pci/quirks.c | 6 +++--- 3 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 59c01d68c6d5..5e51e8bd5c13 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -732,15 +732,18 @@ u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap) { u16 vsec = 0; u32 header; + int ret; if (vendor != dev->vendor) return 0; while ((vsec = pci_find_next_ext_capability(dev, vsec, PCI_EXT_CAP_ID_VNDR))) { - if (pci_read_config_dword(dev, vsec + PCI_VNDR_HEADER, - &header) == PCIBIOS_SUCCESSFUL && - PCI_VNDR_HEADER_ID(header) == cap) + ret = pci_read_config_dword(dev, vsec + PCI_VNDR_HEADER, &header); + if (ret != PCIBIOS_SUCCESSFUL) + continue; + + if (PCI_VNDR_HEADER_ID(header) == cap) return vsec; } diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index ab2a4a3a4c06..0ad440190a32 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1651,15 +1651,15 @@ static void pci_set_removable(struct pci_dev *dev) static bool pci_ext_cfg_is_aliased(struct pci_dev *dev) { #ifdef CONFIG_PCI_QUIRKS - int pos; + int pos, ret; u32 header, tmp; pci_read_config_dword(dev, PCI_VENDOR_ID, &header); for (pos = PCI_CFG_SPACE_SIZE; pos < PCI_CFG_SPACE_EXP_SIZE; pos += PCI_CFG_SPACE_SIZE) { - if (pci_read_config_dword(dev, pos, &tmp) != PCIBIOS_SUCCESSFUL - || header != tmp) + ret = pci_read_config_dword(dev, pos, &tmp); + if ((ret != PCIBIOS_SUCCESSFUL) || (header != tmp)) return false; } diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 5de09d2eb014..0d2e6b0f56cc 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5383,7 +5383,7 @@ int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) */ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev) { - int pos, i = 0; + int pos, i = 0, ret; u8 next_cap; u16 reg16, *cap; struct pci_cap_saved_state *state; @@ -5429,8 +5429,8 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev) pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD; pdev->cfg_size = PCI_CFG_SPACE_EXP_SIZE; - if (pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status) != - PCIBIOS_SUCCESSFUL || (status == 0xffffffff)) + ret = pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status); + if ((ret != PCIBIOS_SUCCESSFUL) || (status == 0xffffffff)) pdev->cfg_size = PCI_CFG_SPACE_SIZE; if (pci_find_saved_cap(pdev, PCI_CAP_ID_EXP))