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 3dc9bef..6dcc7e2 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -1388,7 +1388,7 @@
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;