ARC: [intc-*] Do a domain lookup in primary handler for hwirq -> linux virq
The primary interrupt handler arch_do_IRQ() was passing hwirq as linux
virq to core code. This was fragile and worked so far as we only had legacy/linear
domains.
This came out of a rant by Marc Zyngier.
http://lists.infradead.org/pipermail/linux-snps-arc/2015-December/000298.html
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index 9425263..592cc97 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -137,21 +137,24 @@
.map = arcv2_irq_map,
};
-static struct irq_domain *root_domain;
static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
+ struct irq_domain *root_domain;
+
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
&arcv2_irq_ops, NULL);
-
if (!root_domain)
panic("root irq domain not avail\n");
- /* with this we don't need to export root_domain */
+ /*
+ * Needed for primary domain lookup to succeed
+ * This is a primary irqchip, and can never have a parent
+ */
irq_set_default_host(root_domain);
return 0;
