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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 9B500C282C4 for ; Mon, 4 Feb 2019 15:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D7F520823 for ; Mon, 4 Feb 2019 15:36:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="YJy5Vp6B" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729298AbfBDPgS (ORCPT ); Mon, 4 Feb 2019 10:36:18 -0500 Received: from mta-01.yadro.com ([89.207.88.251]:49282 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726565AbfBDPgS (ORCPT ); Mon, 4 Feb 2019 10:36:18 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 3310441911; Mon, 4 Feb 2019 15:36:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1549294575; x=1551108976; bh=ZFSpeWXC0G6p3BEjk1YvsGQE5boQjBUMxO0 HRmXCPoU=; b=YJy5Vp6BGkXWZ6z7H4JsavNrPhnh130b9PCKUY+zQj/UaoD5q2p 923xIkIbPPdAemGZ/5pb6nZMWCWZUpiXotk0J0+9Foa/kid+dpncCbKz2O7bb8pp 2pN16+72D0+wLkMWNWr5pY0UwghFeYL+8zURBDhti34RriCHmd/rmmx4= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id T-SJkHKIRIRw; Mon, 4 Feb 2019 18:36:15 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 9935241925; Mon, 4 Feb 2019 18:36:10 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 4 Feb 2019 18:36:10 +0300 From: Sergey Miroshnichenko To: CC: Bjorn Helgaas , Rajat Jain , , Sergey Miroshnichenko Subject: [PATCH RFC v3 04/21] PCI: Define PCI-specific version of the release_child_resources() Date: Mon, 4 Feb 2019 18:35:44 +0300 Message-ID: <20190204153601.7576-5-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190204153601.7576-1-s.miroshnichenko@yadro.com> References: <20190204153601.7576-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [172.17.15.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Make the released resources of a bridge valid for later re-assignment: clear the STARTALIGN flag. Resources marked with PCI_FIXED must preserve their offset and size. Signed-off-by: Sergey Miroshnichenko --- drivers/pci/setup-bus.c | 47 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index ed960436df5e..cca23c393e29 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1520,6 +1520,51 @@ static void __pci_bridge_assign_resources(const struct pci_dev *bridge, (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH |\ IORESOURCE_MEM_64) +/* + * Similar to release_child_resources(), but aware of PCI_FIXED and STARTALIGN flags + */ +static void pci_release_child_resources(struct resource *r) +{ + struct resource *tmp, *p; + + if (!r) + return; + + if (r->flags & IORESOURCE_PCI_FIXED) + return; + + p = r->child; + r->child = NULL; + while (p) { + resource_size_t size = resource_size(p); + + tmp = p; + p = p->sibling; + + tmp->parent = NULL; + tmp->sibling = NULL; + pci_release_child_resources(tmp); + + if (!tmp->flags) + continue; + + if (tmp->flags & IORESOURCE_PCI_FIXED) { + pr_debug("PCI: release fixed %pR (%s), keep its flags, base and size\n", + tmp, tmp->name); + continue; + } + + pr_debug("PCI: release %pR (%s)\n", tmp, tmp->name); + + /* need to restore size, and keep all the flags but STARTALIGN */ + tmp->start = 0; + tmp->end = size - 1; + + tmp->flags &= ~IORESOURCE_STARTALIGN; + tmp->flags |= IORESOURCE_SIZEALIGN; + } +} + static void pci_bridge_release_resources(struct pci_bus *bus, unsigned long type) { @@ -1565,7 +1610,7 @@ static void pci_bridge_release_resources(struct pci_bus *bus, * if there are children under that, we should release them * all */ - release_child_resources(r); + pci_release_child_resources(r); if (!release_resource(r)) { type = old_flags = r->flags & PCI_RES_TYPE_MASK; pci_printk(KERN_DEBUG, dev, "resource %d %pR released\n", -- 2.20.1