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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-01-01 12:42:54 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-05-09 07:02:30 +0300 |
| commit | 1b0ccb8a4eee2d8c14adc996e07335cb7aa9e2ac (patch) | |
| tree | b78ae35cc351dd3faffcaf8a6fd200b1dd2a0ec3 /arch/arc/kernel/intc-arcv2.c | |
| parent | 88555cc584d93e658722f090d3f8fb84d5fa15a5 (diff) | |
| download | linux-1b0ccb8a4eee2d8c14adc996e07335cb7aa9e2ac.tar.xz | |
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>
Diffstat (limited to 'arch/arc/kernel/intc-arcv2.c')
| -rw-r--r-- | arch/arc/kernel/intc-arcv2.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c index 942526322ae7..592cc977151e 100644 --- a/arch/arc/kernel/intc-arcv2.c +++ b/arch/arc/kernel/intc-arcv2.c @@ -137,21 +137,24 @@ static const struct irq_domain_ops arcv2_irq_ops = { .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; |