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: 1702660 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=OGgspOZe; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=sIAyS0gB; dkim-atps=neutral Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4N80ZQ68Djz23lT for ; Sat, 12 Nov 2022 00:54:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233644AbiKKNyw (ORCPT ); Fri, 11 Nov 2022 08:54:52 -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-pci@vger.kernel.org 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;