Commit bf6f869f authored Jan 12, 2016 by Liu Jiang Committed by Bjorn Helgaas Jan 14, 2016

genirq/MSI: Relax msi_domain_alloc() to support parentless MSI irqdomains



Previously msi_domain_alloc() assumed MSI irqdomains always had parent
irqdomains, but that's not true for the new Intel VMD devices.  Relax
msi_domain_alloc() to support parentless MSI irqdomains.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

parent 1ec21837

kernel/irq/msi.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -109,9 +109,11 @@ static int msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
		if (irq_find_mapping(domain, hwirq) > 0)
		return -EEXIST;

		if (domain->parent) {
		ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
		if (ret < 0)
		return ret;
		}

		for (i = 0; i < nr_irqs; i++) {
		ret = ops->msi_init(domain, info, virq + i, hwirq + i, arg);