From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 19 Jul 2011 14:25:42 +0000 (+0200)
Subject: x86, iommu: Mark DMAR IRQ as non-threaded
X-Git-Tag: v3.0.5~123
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=56794483bcbf98296dffd8d8923402791b305be2;p=karo-tx-linux.git

x86, iommu: Mark DMAR IRQ as non-threaded

commit 477694e71113fd0694b6bb0bcc2d006b8ac62691 upstream.

Mark this lowlevel IRQ handler as non-threaded. This prevents a boot
crash when "threadirqs" is on the kernel commandline. Also the
interrupt handler is handling hardware critical events which should
not be delayed into a thread.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 3dc9befa5aec..6dcc7e2d54de 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -1388,7 +1388,7 @@ int dmar_set_interrupt(struct intel_iommu *iommu)
 		return ret;
 	}
 
-	ret = request_irq(irq, dmar_fault, 0, iommu->name, iommu);
+	ret = request_irq(irq, dmar_fault, IRQF_NO_THREAD, iommu->name, iommu);
 	if (ret)
 		printk(KERN_ERR "IOMMU: can't request irq\n");
 	return ret;