linux-kernel - [tip:irq/core] x86/PCI/VMD: Use untracked irq handler

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Date:	Sat, 18 Jun 2016 01:07:38 -0700
From:	tip-bot for Keith Busch <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	bhelgaas@...gle.com, jonathan.derrick@...el.com,
	keith.busch@...el.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, mingo@...nel.org, hpa@...or.com
Subject: [tip:irq/core] x86/PCI/VMD: Use untracked irq handler

Commit-ID:  30ce0350381351646ef86b64e6d3840b3869833b
Gitweb:     http://git.kernel.org/tip/30ce0350381351646ef86b64e6d3840b3869833b
Author:     Keith Busch <keith.busch@...el.com>
AuthorDate: Fri, 17 Jun 2016 16:00:21 -0600
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sat, 18 Jun 2016 10:00:55 +0200

x86/PCI/VMD: Use untracked irq handler

There is no way to know which device in a VMD triggered an interrupt
without invoking every registered driver's actions. This uses the
untracked irq handler so that a less used device does not trigger
spurious interrupt.

We have been previously recommending users to enable "noirqdebug", but do
not want to force a system setting just to keep this domain functional.

Signed-off-by: Keith Busch <keith.busch@...el.com>
Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org
Cc: Jon Derrick <jonathan.derrick@...el.com>
Link: http://lkml.kernel.org/r/1466200821-29159-2-git-send-email-keith.busch@intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 arch/x86/pci/vmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/pci/vmd.c b/arch/x86/pci/vmd.c
index 7792aba..613cac7 100644
--- a/arch/x86/pci/vmd.c
+++ b/arch/x86/pci/vmd.c
@@ -195,7 +195,7 @@ static int vmd_msi_init(struct irq_domain *domain, struct msi_domain_info *info,
 	vmdirq->virq = virq;
 
 	irq_domain_set_info(domain, virq, vmdirq->irq->vmd_vector, info->chip,
-			    vmdirq, handle_simple_irq, vmd, NULL);
+			    vmdirq, handle_untracked_irq, vmd, NULL);
 	return 0;
 }