From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B71F7C32789 for ; Sun, 4 Nov 2018 14:02:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 805D6204FD for ; Sun, 4 Nov 2018 14:02:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="O9k/q5ti" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 805D6204FD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731457AbeKDXRT (ORCPT ); Sun, 4 Nov 2018 18:17:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:46940 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730928AbeKDXIT (ORCPT ); Sun, 4 Nov 2018 18:08:19 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CB286204FD; Sun, 4 Nov 2018 13:53:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541339596; bh=+VqJiRuqhuFqZxBNR+S9XgdQ3dPefuhldPmWjGVD00U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O9k/q5tiaRirFp6f9Qdr6k1+vwURQSO8oBJDc02wGx5CBF46I2Hk8PQs7DEn5p04B e32J+TSb5FeN98lV8TLXxnCHy+6CBrXzL1kP96EqNMKiJjyXM84JbqI+cK39F+7lJC ssC+vpwK+2d6loBCfHd5nIQUk8Dr4793CNdvi8Uo= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Huacai Chen , Paul Burton , Ralf Baechle , James Hogan , linux-mips@linux-mips.org, Fuxin Zhang , Zhangjin Wu , Huacai Chen , Sasha Levin Subject: [PATCH AUTOSEL 4.18 34/45] MIPS/PCI: Call pcie_bus_configure_settings() to set MPS/MRRS Date: Sun, 4 Nov 2018 08:52:29 -0500 Message-Id: <20181104135240.88431-34-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181104135240.88431-1-sashal@kernel.org> References: <20181104135240.88431-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Huacai Chen [ Upstream commit 2794f688b2c336e0da85e9f91fed33febbd9f54a ] Call pcie_bus_configure_settings() on MIPS, like for other platforms. The function pcie_bus_configure_settings() makes sure the MPS (Max Payload Size) across the bus is uniform and provides the ability to tune the MRSS (Max Read Request Size) and MPS (Max Payload Size) to higher performance values. Some devices will not operate properly if these aren't set correctly because the firmware doesn't always do it. Signed-off-by: Huacai Chen Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/20649/ Cc: Ralf Baechle Cc: James Hogan Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Cc: Huacai Chen Signed-off-by: Sasha Levin --- arch/mips/pci/pci-legacy.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c index f1e92bf743c2..3c3b1e6abb53 100644 --- a/arch/mips/pci/pci-legacy.c +++ b/arch/mips/pci/pci-legacy.c @@ -127,8 +127,12 @@ static void pcibios_scanbus(struct pci_controller *hose) if (pci_has_flag(PCI_PROBE_ONLY)) { pci_bus_claim_resources(bus); } else { + struct pci_bus *child; + pci_bus_size_bridges(bus); pci_bus_assign_resources(bus); + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child); } pci_bus_add_devices(bus); } -- 2.17.1