From patchwork Fri Dec 10 22:18:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12671013 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9C39C4167B for ; Fri, 10 Dec 2021 22:19:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344733AbhLJWWq (ORCPT ); Fri, 10 Dec 2021 17:22:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344691AbhLJWW3 (ORCPT ); Fri, 10 Dec 2021 17:22:29 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62527C061746; Fri, 10 Dec 2021 14:18:51 -0800 (PST) Message-ID: <20211210221813.434156196@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1639174730; 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=VrU+cUwVNt/tRlW4lw+bzWjrRhpWxr0n5kAnta20rq4=; b=pE4rQ2ru1rC+MOxwgCFck9hIsKI0LjZICNGNwEw8ze9/meweY1qANt4dgwIHKfQOPC1beg yPBns7caG7PjSlQkEoMvTCi/DDid/5ijo+pcU/3ZLIE1LS+qQRJIeuxZj2Mi/GYsUgFxDG UfE4buF12pfMJCkH4E7kXOGXF3Tdxoadhmimlb4Oqaa6At4sxsqGTcRd4XwvSUVolW7xT/ BZ6l4WzdOdHBFzRU8fuHCGeKVTvU3fpMB68bg/XbArySIyUaHyjLg/eiywsouAZhDcRfnk 7ETqReSwtzm9CpcynGCRQWFvda5xRxitOgtngCsHnX2u5kMmZ6hOfaZO1ylegg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1639174730; 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=VrU+cUwVNt/tRlW4lw+bzWjrRhpWxr0n5kAnta20rq4=; b=4a4+C7WhuYdeuyTtWKdNyTdvLDhhfziSubOZ+5mUXlzgk+OuqIM6rjcLPfL3/GtWFOnIFc gcXKQZiyuUQutAAA== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , Juergen Gross , xen-devel@lists.xenproject.org, Arnd Bergmann , Michael Ellerman , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, Greg Kroah-Hartman , Bjorn Helgaas , Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , Santosh Shilimkar , linux-arm-kernel@lists.infradead.org, Vinod Koul , dmaengine@vger.kernel.org, Mark Rutland , Will Deacon , Robin Murphy , Joerg Roedel , iommu@lists.linux-foundation.org, Jassi Brar , Peter Ujfalusi , Sinan Kaya Subject: [patch V3 04/35] genirq/msi: Use PCI device property References: <20211210221642.869015045@linutronix.de> MIME-Version: 1.0 Date: Fri, 10 Dec 2021 23:18:49 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org From: Thomas Gleixner to determine whether this is MSI or MSIX instead of consulting MSI descriptors. Signed-off-by: Thomas Gleixner Reviewed-by: Jason Gunthorpe --- V2: Use PCI device property - Jason --- kernel/irq/msi.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -77,21 +77,8 @@ EXPORT_SYMBOL_GPL(get_cached_msi_msg); static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct msi_desc *entry; - bool is_msix = false; - unsigned long irq; - int retval; - - retval = kstrtoul(attr->attr.name, 10, &irq); - if (retval) - return retval; - - entry = irq_get_msi_desc(irq); - if (!entry) - return -ENODEV; - - if (dev_is_pci(dev)) - is_msix = entry->pci.msi_attrib.is_msix; + /* MSI vs. MSIX is per device not per interrupt */ + bool is_msix = dev_is_pci(dev) ? to_pci_dev(dev)->msix_enabled : false; return sysfs_emit(buf, "%s\n", is_msix ? "msix" : "msi"); }