linux-kernel - [PATCH] x86/apic/msi: Unbreak DMAR and HPET MSI

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Date:   Sun, 27 Sep 2020 10:46:44 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>, Qian Cai <cai@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-next@...r.kernel.org, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org, linux-hyperv@...r.kernel.org,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Jon Derrick <jonathan.derrick@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Wei Liu <wei.liu@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Steve Wahl <steve.wahl@....com>,
        Dimitri Sivanich <sivanich@....com>,
        Russ Anderson <rja@....com>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        xen-devel@...ts.xenproject.org, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Megha Dey <megha.dey@...el.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jacob Pan <jacob.jun.pan@...el.com>,
        Baolu Lu <baolu.lu@...el.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH] x86/apic/msi: Unbreak DMAR and HPET MSI

Switching the DMAR and HPET MSI code to use the generic MSI domain ops
missed to add the flag which tells the core code to update the domain
operations with the defaults. As a consequence the core code crashes
when an interrupt in one of those domains is allocated.

Add the missing flags.

Fixes: 9006c133a422 ("x86/msi: Use generic MSI domain ops")
Reported-by: Qian Cai <cai@...hat.com> 
Reported-by: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/kernel/apic/msi.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -309,6 +309,7 @@ static struct msi_domain_ops dmar_msi_do
 static struct msi_domain_info dmar_msi_domain_info = {
 	.ops		= &dmar_msi_domain_ops,
 	.chip		= &dmar_msi_controller,
+	.flags		= MSI_FLAG_USE_DEF_DOM_OPS,
 };
 
 static struct irq_domain *dmar_get_irq_domain(void)
@@ -408,6 +409,7 @@ static struct msi_domain_ops hpet_msi_do
 static struct msi_domain_info hpet_msi_domain_info = {
 	.ops		= &hpet_msi_domain_ops,
 	.chip		= &hpet_msi_controller,
+	.flags		= MSI_FLAG_USE_DEF_DOM_OPS,
 };
 
 struct irq_domain *hpet_create_irq_domain(int hpet_id)