From patchwork Fri Nov 11 13:54:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 18752 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp752561wru; Fri, 11 Nov 2022 05:56:20 -0800 (PST) X-Google-Smtp-Source: AA0mqf4XPStNRa0FxwV7HDtXfYcFWoB8KVRuD4vDgoO6idF+T3TrBMeEU6wisjAws82esOCzU/q3 X-Received: by 2002:a17:907:2904:b0:78d:8b9b:de8c with SMTP id eq4-20020a170907290400b0078d8b9bde8cmr1868563ejc.436.1668174980184; Fri, 11 Nov 2022 05:56:20 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668174980; cv=none; d=google.com; s=arc-20160816; b=jiv0Zr0U35QRJ4ceWXGgp74G1wBvpS1cbyEHOykryvCKEp1SkZ8XbNErQFmxakfijT jmQbkqwGgNjmIjFIVXZA+ATKEDTVT1rfAvLPRGzn/8Zet+THXCUdzNpOXVMRiGGVnogZ bGkHfcDAN12GsMxzr2D37+rluMaXs0ToGSqQj2eXs1XVVuuagYx2iAdIuPXtA83YGoBH bgJAXnvg/bwlz7N907ALYQO6Ezgf5fkcU+AhOJ52/bowIinyxZZRDaUFtGy9dTjEw53/ eLGHvbEIY+q4Fz01Wd5V+Il7/y3Yp8H4cTdcA3bq2mF+jY5gBKpQU5h/l9v+pC2/wpMB OKkA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:date:mime-version:references:subject:cc:to:from :dkim-signature:dkim-signature:message-id; bh=efOtDMgGZtrOq2C93xDB3bkE3dnMFMUi6PhL2K3F+Xc=; b=IYp+gMtMuqzuyi8rIAxCrr6iPi8FDsb3HJEOzxbJWyWwTfXLY2eY4Crm1bqSYLzZKy DW7RGeippZZXb0/mc2/Kd5a8QjLZrprLKBPRcHaYftpYzZUtgkOk1UKO0L+41w8mXGva S6WeGq+U6Q0jdbhscrcfnWntsvVNfKdU/0cvdhTDtLdiPs4SQkPztrEXC+6CQYDz0oLu 1+JWS59ZhjAa9iZ5XaZD7BMgp4ZrhNmgla3L1b4Hmnx7hrtL1NQVev8DQ4yu3yTaRNnl T3xXf/5z1brkj+8wrQrvK3+bF0IXD6qeiizrJAJjw/jgNJP8YqbyjPSMLBNsn+Kgfn7j D3Sg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=OGgspOZe; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id cs15-20020a170906dc8f00b007ad2d85d753si1989777ejc.495.2022.11.11.05.55.55; Fri, 11 Nov 2022 05:56:20 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=OGgspOZe; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233690AbiKKNyy (ORCPT + 99 others); Fri, 11 Nov 2022 08:54:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57854 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233518AbiKKNyY (ORCPT ); Fri, 11 Nov 2022 08:54:24 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2220F654F6; Fri, 11 Nov 2022 05:54:24 -0800 (PST) Message-ID: <20221111122013.888850936@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1668174862; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=efOtDMgGZtrOq2C93xDB3bkE3dnMFMUi6PhL2K3F+Xc=; b=OGgspOZeBC55SSE4L/03t3Yj8kEAUvaCDyesgMfIQ/8qhXJLoIiwTqSD0usnmt+jNWsGxe jJQIhOK2glpk+B7OSR+bSxnJRrGYjm7l6+v8O35MDAj8CaLu4GeF+phCjLDtbCTxh5572M +ZpPJAvMXeUjr0mPgIt+9+snp1r51HIvN8aPT4w0auBrP/NkfAAUYZzp759bwdCn1Kq78A lb32ySTfELSWx1/+L0w3PdN47RZdW50J4E5gvQQfzie7ob1/CZlWpi2e3Wn5ebKYWS0ZtB zSBgFrBCzs8wHVGv86iPTFC38nFfQbhWVVsDO/a8gXoX8MLGY2aFp0qzQ9nWRA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1668174862; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=efOtDMgGZtrOq2C93xDB3bkE3dnMFMUi6PhL2K3F+Xc=; b=sIAyS0gBMPiZE7rx+h8POgBoJq70Rx877SA8g16n791fowonYh2meMpqEAwdbzM0ajaQbK ljBVTKfudKOlfWCg== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Joerg Roedel , Will Deacon , linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Marc Zyngier , Greg Kroah-Hartman , Jason Gunthorpe , Dave Jiang , Alex Williamson , Kevin Tian , Dan Williams , Logan Gunthorpe , Ashok Raj , Jon Mason , Allen Hubbe , Michael Ellerman , Christophe Leroy , linuxppc-dev@lists.ozlabs.org, "Ahmed S. Darwish" , Reinette Chatre Subject: [patch 05/39] genirq/msi: Remove filter from msi_free_descs_free_range() References: <20221111120501.026511281@linutronix.de> MIME-Version: 1.0 Date: Fri, 11 Nov 2022 14:54:22 +0100 (CET) X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749208248353951191?= X-GMAIL-MSGID: =?utf-8?q?1749208248353951191?= When a range of descriptors is freed then all of them are not associated to a linux interrupt. Remove the filter and add a warning to the free function. Signed-off-by: Thomas Gleixner Reviewed-by: Jason Gunthorpe Tested-by: Miquel Raynal --- drivers/base/platform-msi.c | 2 +- include/linux/msi.h | 5 ++--- kernel/irq/msi.c | 19 ++++++++++--------- 3 files changed, 13 insertions(+), 13 deletions(-) --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -325,7 +325,7 @@ void platform_msi_device_domain_free(str msi_lock_descs(data->dev); irq_domain_free_irqs_common(domain, virq, nr_irqs); - msi_free_msi_descs_range(data->dev, MSI_DESC_ALL, virq, virq + nr_irqs - 1); + msi_free_msi_descs_range(data->dev, virq, virq + nr_irqs - 1); msi_unlock_descs(data->dev); } --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -247,8 +247,7 @@ static inline void pci_write_msi_msg(uns #endif /* CONFIG_PCI_MSI */ int msi_add_msi_desc(struct device *dev, struct msi_desc *init_desc); -void msi_free_msi_descs_range(struct device *dev, enum msi_desc_filter filter, - unsigned int first_index, unsigned int last_index); +void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, unsigned int last_index); /** * msi_free_msi_descs - Free MSI descriptors of a device @@ -256,7 +255,7 @@ void msi_free_msi_descs_range(struct dev */ static inline void msi_free_msi_descs(struct device *dev) { - msi_free_msi_descs_range(dev, MSI_DESC_ALL, 0, MSI_MAX_INDEX); + msi_free_msi_descs_range(dev, 0, MSI_MAX_INDEX); } void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -120,7 +120,7 @@ static int msi_add_simple_msi_descs(stru fail_mem: ret = -ENOMEM; fail: - msi_free_msi_descs_range(dev, MSI_DESC_ALL, index, last); + msi_free_msi_descs_range(dev, index, last); return ret; } @@ -141,12 +141,11 @@ static bool msi_desc_match(struct msi_de /** * msi_free_msi_descs_range - Free MSI descriptors of a device * @dev: Device to free the descriptors - * @filter: Descriptor state filter * @first_index: Index to start freeing from * @last_index: Last index to be freed */ -void msi_free_msi_descs_range(struct device *dev, enum msi_desc_filter filter, - unsigned int first_index, unsigned int last_index) +void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, + unsigned int last_index) { struct xarray *xa = &dev->msi.data->__store; struct msi_desc *desc; @@ -155,10 +154,12 @@ void msi_free_msi_descs_range(struct dev lockdep_assert_held(&dev->msi.data->mutex); xa_for_each_range(xa, idx, desc, first_index, last_index) { - if (msi_desc_match(desc, filter)) { - xa_erase(xa, idx); - msi_free_desc(desc); - } + xa_erase(xa, idx); + + /* Leak the descriptor when it is still referenced */ + if (WARN_ON_ONCE(msi_desc_match(desc, MSI_DESC_ASSOCIATED))) + continue; + msi_free_desc(desc); } } @@ -739,7 +740,7 @@ int msi_domain_populate_irqs(struct irq_ fail: for (--virq; virq >= virq_base; virq--) irq_domain_free_irqs_common(domain, virq, 1); - msi_free_msi_descs_range(dev, MSI_DESC_ALL, virq_base, virq_base + nvec - 1); + msi_free_msi_descs_range(dev, virq_base, virq_base + nvec - 1); unlock: msi_unlock_descs(dev); return ret;