From patchwork Wed Jun 20 21:38:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 10478759 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7960760230 for ; Wed, 20 Jun 2018 21:35:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A49D27CF3 for ; Wed, 20 Jun 2018 21:35:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5EED4290DC; Wed, 20 Jun 2018 21:35:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 00A5727CF3 for ; Wed, 20 Jun 2018 21:35:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933433AbeFTVfi (ORCPT ); Wed, 20 Jun 2018 17:35:38 -0400 Received: from mga03.intel.com ([134.134.136.65]:20584 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933422AbeFTVfX (ORCPT ); Wed, 20 Jun 2018 17:35:23 -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 orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jun 2018 14:35:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,249,1526367600"; d="scan'208";a="238905913" Received: from unknown (HELO localhost.lm.intel.com) ([10.232.112.44]) by fmsmga005.fm.intel.com with ESMTP; 20 Jun 2018 14:35:22 -0700 From: Keith Busch To: Linux PCI , Bjorn Helgaas Cc: Sinan Kaya , Oza Pawandeep , Keith Busch Subject: [PATCH 3/7] PCI/DPC: Remove rp_pio_status from dpc struct Date: Wed, 20 Jun 2018 15:38:29 -0600 Message-Id: <20180620213833.25072-3-keith.busch@intel.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180620213833.25072-1-keith.busch@intel.com> References: <20180620213833.25072-1-keith.busch@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We don't need to save the rp pio status across multiple contexts as all DPC event handling occurs in a single work queue context. Signed-off-by: Keith Busch --- drivers/pci/pcie/dpc.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index 5f5fac279c75..1b0b25ba947c 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -19,7 +19,6 @@ struct dpc_dev { struct work_struct work; u16 cap_pos; bool rp_extensions; - u32 rp_pio_status; u8 rp_log_size; }; @@ -96,11 +95,6 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev) if (dpc->rp_extensions && dpc_wait_rp_inactive(dpc)) return PCI_ERS_RESULT_DISCONNECT; - if (dpc->rp_extensions && dpc->rp_pio_status) { - pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, - dpc->rp_pio_status); - dpc->rp_pio_status = 0; - } pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS, PCI_EXP_DPC_STATUS_TRIGGER); @@ -122,8 +116,6 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) dev_err(dev, "rp_pio_status: %#010x, rp_pio_mask: %#010x\n", status, mask); - dpc->rp_pio_status = status; - pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SEVERITY, &sev); pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SYSERROR, &syserr); pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_EXCEPTION, &exc); @@ -134,15 +126,14 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &dpc_status); first_error = (dpc_status & 0x1f00) >> 8; - status &= ~mask; for (i = 0; i < ARRAY_SIZE(rp_pio_error_string); i++) { - if (status & (1 << i)) + if ((status & ~mask) & (1 << i)) dev_err(dev, "[%2d] %s%s\n", i, rp_pio_error_string[i], first_error == i ? " (First)" : ""); } if (dpc->rp_log_size < 4) - return; + goto clear_status; pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG, &dw0); pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 4, @@ -155,7 +146,7 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) dw0, dw1, dw2, dw3); if (dpc->rp_log_size < 5) - return; + goto clear_status; pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_IMPSPEC_LOG, &log); dev_err(dev, "RP PIO ImpSpec Log %#010x\n", log); @@ -164,6 +155,8 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, &prefix); dev_err(dev, "TLP Prefix Header: dw%d, %#010x\n", i, prefix); } + clear_status: + pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, status); } static void dpc_work(struct work_struct *work)