From patchwork Fri Jun 2 18:54:18 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Burton X-Patchwork-Id: 9763195 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 0A96E602BF for ; Fri, 2 Jun 2017 18:55:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F077C285A8 for ; Fri, 2 Jun 2017 18:55:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E4B61285B0; Fri, 2 Jun 2017 18:55:53 +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=-6.9 required=2.0 tests=BAYES_00,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 6612F285A8 for ; Fri, 2 Jun 2017 18:55:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751170AbdFBSzw (ORCPT ); Fri, 2 Jun 2017 14:55:52 -0400 Received: from mailapp01.imgtec.com ([195.59.15.196]:10643 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751007AbdFBSzw (ORCPT ); Fri, 2 Jun 2017 14:55:52 -0400 Received: from hhmail02.hh.imgtec.org (unknown [10.100.10.20]) by Forcepoint Email with ESMTPS id 4AB632291424F; Fri, 2 Jun 2017 19:55:46 +0100 (IST) Received: from localhost (10.20.1.33) by hhmail02.hh.imgtec.org (10.100.10.21) with Microsoft SMTP Server (TLS) id 14.3.294.0; Fri, 2 Jun 2017 19:55:49 +0100 From: Paul Burton To: CC: Bjorn Helgaas , Michal Simek , Bharat Kumar Gogada , Ravikiran Gummaluri , Paul Burton Subject: [PATCH v4 3/4] PCI: xilinx: Don't enable config completion interrupts Date: Fri, 2 Jun 2017 11:54:18 -0700 Message-ID: <20170602185420.22281-4-paul.burton@imgtec.com> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170602185420.22281-1-paul.burton@imgtec.com> References: <20170602185420.22281-1-paul.burton@imgtec.com> MIME-Version: 1.0 X-Originating-IP: [10.20.1.33] 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 The Xilinx AXI bridge for PCI Express device provides interrupts indicating the completion of config space accesses. We have previously enabled/unmasked them but do nothing with them besides acknowledge them. Leave the interrupts masked in order to avoid servicing a large number of pointless interrupts during boot. Signed-off-by: Paul Burton Cc: Bharat Kumar Gogada Cc: Bjorn Helgaas Cc: Michal Simek Cc: Ravikiran Gummaluri Cc: linux-pci@vger.kernel.org --- Changes in v4: None Changes in v3: None Changes in v2: None drivers/pci/host/pcie-xilinx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c index 0c0ecc463f6b..f3018c1c8a59 100644 --- a/drivers/pci/host/pcie-xilinx.c +++ b/drivers/pci/host/pcie-xilinx.c @@ -60,6 +60,7 @@ #define XILINX_PCIE_INTR_MST_SLVERR BIT(27) #define XILINX_PCIE_INTR_MST_ERRP BIT(28) #define XILINX_PCIE_IMR_ALL_MASK 0x1FF30FED +#define XILINX_PCIE_IMR_ENABLE_MASK 0x1FF30F0D #define XILINX_PCIE_IDR_ALL_MASK 0xFFFFFFFF /* Root Port Error FIFO Read Register definitions */ @@ -553,8 +554,8 @@ static void xilinx_pcie_init_port(struct xilinx_pcie_port *port) XILINX_PCIE_IMR_ALL_MASK, XILINX_PCIE_REG_IDR); - /* Enable all interrupts */ - pcie_write(port, XILINX_PCIE_IMR_ALL_MASK, XILINX_PCIE_REG_IMR); + /* Enable all interrupts we handle */ + pcie_write(port, XILINX_PCIE_IMR_ENABLE_MASK, XILINX_PCIE_REG_IMR); /* Enable the Bridge enable bit */ pcie_write(port, pcie_read(port, XILINX_PCIE_REG_RPSC) |